What can be cooked from squid: quick and tasty

Demolition of all types of bridges is one of the specializations construction company"Triumph". We have all the necessary approvals, working and technical means for dismantling bridges of any complexity.

Our services

How much does it cost to demolish a bridge?

The preliminary cost of dismantling the bridge is calculated based on the following data:

Our specialist will tell you the exact cost of the work after visiting the site and carrying out all the necessary engineering calculations.

Dismantling technology

Work begins with an inspection of the object, after which a decision is made on the use of certain technical means.

Your benefits

Dismantling of bridges today is in demand along with the demolition of buildings. The reason is that many structures have long served their time and require replacement, and given the fact that the bridge is a dangerous structure, it must be replaced and repaired without delay, especially when it comes to transport bridges: automobile, railway, metro bridges. ... Constant vibrations, external natural influences and regular operation wear out the structure, due to which it loses its strength and reliability.

How are bridges dismantled

Depending on the structure, the size of the bridge, the main material from which it was erected and features road surface dismantling of bridges can be carried out in several ways: explosive, mechanical and technical. In addition, his choice is also influenced by the physical state of the bridge, the presence of bypass roads and the surrounding traffic conditions: whether there is still partial traffic on the bridge or the bridge is not being fully used at the moment.

As a rule, the explosive dismantling of the bridge is used for monolithic structures, and dismantling with the dismantling of the structure into separate elements is preferable for prefabricated bridges. The blasting method is used only when it is possible to protect the hazardous area for access and passage and blasting operations will not harm the environment. If this is not possible, then the dismantling of bridges is carried out manually or mechanically using special tools and heavy equipment, for example, laser cutting.

Dismantling of steel bridges is carried out using auxiliary supports and scaffolds, the bridge is dismantled in large parts. Dismantling also uses cranes, self-propelled modular trolleys, jacking and rigging systems, platform barges, etc.

The easiest thing is to dismantle wooden bridges with low bearing capacity. Such demolition of the bridge can be carried out by means of cable traction using a cable winch or by disassembly method. Today wooden bridges are rarely built, their service life is very short - only 10-15 years. They are used only as temporary structures.

With the greatest care, the dismantling of the bridge thrown over the reservoir is carried out: all work must be done carefully, completely excluding construction waste in water. For this, a modern and effective technology of diamond cutting with discs and a rope is used, which makes it possible to easily cope with concrete, reinforced concrete, monolith with a minimum volume of construction waste.

Connecting elements and reinforcement elements for converting beam-split spans into a continuous system should be designed for easy, safe and reliable dismantling.

The connecting elements and reinforcement elements are dismantled, starting with the operation of removing fasteners in the nodes and joints only in the absence of axial forces in them, preventing the simultaneous disassembly of several main nodes of the trusses (or branches).

The elements are unloaded by jacking up the mounted superstructure on the support. The procedure for dismantling the connecting elements and reinforcement elements must be specified in the project for the production of works. Work on the dismantling of connecting elements is classified as particularly difficult and must be carried out with the participation of a manager. installation works.

For typical spans, inventory reusable connectors and reinforcements should be used. When dismantling, it is necessary to take measures for their safety.

When dismantling the connecting elements and SVSiU, the sequence of removal of structures specified in the PPR must be observed. In the dismantled elements at the level of the center of gravity of the section, there should be no forces from the weight of the mounted superstructure. When removing the elements suspended from the crane hook from the units and connections, jacks, lever winches and other means of movement should be used.Dismantled elements should be laid on the ground, on floating or transport vehicles, ensuring their stable position.

Performing particularly critical operations with mounted, semi-mounted and balanced surface mounting should be supervised by the manufacturer of installation work, appointed by order of the bridge building organization. Particularly important operations include:

Lifting and lowering of superstructures with hydraulic jacks with installation on supporting parts;

Sampling of the cantilever deflection with the support of the superstructure on the next support;

Dismantling of connecting elements between split superstructures;

Closing the superstructure in the middle of the span when installing from two banks;

Balanced hinged installation.

If necessary, the organization carrying out the installation develops production instructions for ensuring labor safety.

To avoid contamination environment the following activities should be performed:

The assembly site, including a warehouse of metal structures, stands for pre-assembly and welding of assembly elements, household and industrial premises should be located outside the water protection zone;

Access roads and the installation site itself must be covered with precast concrete slabs, laid on a sandy base, without damaging the soil layer;

Crane overpasses and working bridges in the water area of ​​streams or reservoirs should be erected according to projects agreed with the water and fish protection authorities;

The bases of temporary supports for semi-mounted installation should be arranged, as a rule, from driven metal pipes without excavation of soil from cavities.

After completion of construction and installation work, all temporary structures in the riverbed and on the site must be dismantled, and the riverbed and banks must be brought to the condition indicated in the master plan of the bridge structure.

2.Dismantling the connecting elements

Dismantling the connecting elements split spans with (Fig. 6.30) is performed only when the values ​​of the forces in these elements are brought to zero.

Rice. 6.30 - Diagrams for the dismantling of connecting elements

This is achieved by jacking up the end of the superstructure by the value Δ, when the angle in the vertical plane between adjacent superstructures is zero, i.e., if the mutual angle of rotation of the ends of the superstructure during their deflection from their own weight when the profile of the adjacent superstructures is fractured will be zero. For this, the value of the end of the superstructure blowing out should be equal to 2Lφ where φ is the angle of rotation of the end of the superstructure with a span of length L when it is loaded with its own weight.

The expiration value can be quite large, for example, with a span of 100 m, the end of the console can be raised by 80 cm.

Erection cranes for hinged mounting, these are full-slewing jib cranes, as well as rigid-legged derrick cranes with a lifting capacity of up to 20 tons with a boom length of about 20 m, moving along the upper chords of the trusses. Before installing the element, the cranes (Fig. 6.31 and 6.32) are anchored behind the belts of the trusses of the superstructure to be assembled.

Rice. 6.31 - Derrick-crane МДК-63-1100: I, II, III, IV - possible layouts of crane runways (scheme IV - with equal gauge A and base B)

Figure 6.32 - Derrick-crane UMK-2 on the upper chords of the superstructure to be mounted: 1 - truss axis; 2 - the upper belt of the truss

Non-full-slewing cranes are used, the boom angle of which in the plan reaches 240-260 ° when the crane is supported at three points (at the base of the mast and the lower knots of the struts) and up to 160-170 ° when the crane is installed on a horizontal frame of a rectangular truss.

When dismantling the connecting elements and SVSiU, the sequence of removal of structures specified in the PPR must be observed. The dismantled elements should not contain any forces from the weight of the assembled superstructure. When removing the elements suspended from the crane hook from the nodes and connections, jacks, lever winches and other means of movement should be used. The elements to be dismantled should be laid on the ground, floating or transport vehicles, ensuring their stable position.

Connecting elements for converting ball-split superstructures into a continuous system should be designed on the basis of their simple, safe and reliable dismantling.

The connecting elements are removed, starting with the operation of removing the fasteners, only if there are no axial forces in them.

The elements are unloaded by jacking up the mounted superstructure on a capital support. The procedure for dismantling the connecting elements must be specified in the project for the production of works. Dismantling of connecting elements is classified as particularly difficult and must be carried out with the participation of the head of installation work.

For typical spans, inventory reusable connectors should be used. When dismantling, it is necessary to take measures for their safety.

When dismantling the connecting elements and SVSiU, the sequence of removing structures specified in the PPR must be observed. The dismantled elements should not contain any forces from the weight of the assembled superstructure. When removing elements suspended from the crane hook from units and connections, jacks, lever winches and other means of movement should be used. The elements to be dismantled should be laid on the ground, floating or transport vehicles, ensuring their stable position.
Source: http://www.gosthelp.ru/text/STP00497Navesnojipolunave.html

Comprehensive mechanization of erection (dismantling) of building structures during the reconstruction of buildings and structures has some peculiarities, consisting in the parameters of the external and internal constraint of the object and the need to replace or strengthen existing structures. During the installation of building structures during the reconstruction of buildings, it is necessary to perform some manual operations, for example, when passing prefabricated elements through obstacles, making interfaces with existing structures. This must be taken into account when choosing the means of complex mechanization of installation work to ensure the continuity of the technological process.

In domestic practice, the method of large-block installation with preliminary enlargement of structures is widely used. The enlargement of individual structural elements into assembly blocks can significantly reduce the volume of labor-intensive and dangerous work at height, reduce the cost of arranging temporary scaffolds, supports, etc., improve working conditions and improve the quality of work. The optimal degree of enlargement of structures should be determined by technical and economic calculations. At. In this case, the dimensions of the mounting blocks during the reconstruction of buildings and structures should be compared with the parameters of the constraint of the object.

A prerequisite for the effectiveness of methods of reconstruction of objects in general is the industrialization of the dismantling of building structures. Dismantling work is rather difficult to mechanize. The task is there „so that the dismantling of structures, if possible, is carried out by block methods, using all the materials obtained during the processing of dismantling blocks.
The main methods of erection of building structures during reconstruction are determined by: parameters of constraint; the ability to use mounted blocks to move assembly machines around them; types of mounted structures; the degree of wear and tear of existing structures; the order in which the floors are assembled; technological conditions.

The technological sequence of installation and dismantling of structures predetermines the organization of work according to separate or complex schemes.

With a separate scheme, at the first stage of the technological process, all structures to be replaced within the facility are dismantled, and then new ones are mounted. In this case, dismantling and installation can be done using different machines. A separate scheme is used in conditions when the dismantling of structures does not threaten the collapse of adjacent elements or the overall stability of buildings. Its advantage is the possibility of using powerful assembly machines. However, it is often necessary to carry out a large amount of work to strengthen structures and ensure the overall stability of the building. The possibility of combining the execution of subsequent works is also somewhat limited.

The complex scheme provides for the combination of dismantling and erection of structures in compliance with the conditions ensuring sufficient strength, rigidity and stability of adjacent structures and the structure as a whole. The scheme provides for the sequential replacement of structures by grips, sections and cells. Assembly and disassembly works are performed using the same set of machines. At the same time, the front is opened for subsequent work, as a result of which the overall reconstruction time is reduced.

Currently, installation organizations have wide choice serial hoisting machines. However, in conditions of reconstruction, such characteristics of means as their mobility, dimensions in transport position and own weight, ease of re-equipment, the ability to maneuver with a load on a hook in a confined space, etc. are of significant importance. Our industry does not yet produce technologically specialized cranes for reconstruction conditions. Therefore, it is necessary to use existing serial lifting mechanisms.

The most widespread during reconstruction are self-propelled jib cranes, including automobile, pneumatic, crawler and, less often, railway cranes. This is due to the relatively low costs of transportation, installation and dismantling, as well as the relatively high maneuverability.

However, the ability of self-propelled jib cranes to move with a load, in contrast to tower cranes, is very limited. Therefore, the erected structures, prior to the start of installation, must be laid in a specially designated place, taking into account the erection parking of the crane, its lifting capacity, boom reach and the place of installation of the structures in the design position.

Occupation of the area of ​​the reconstructed spans with existing lifting structures often does not allow fulfilling this requirement, which causes additional costs for sorting structures, arranging special entrances, feeding structures under the hook using auxiliary transport vehicles (transport carts, tractors, etc.).

When organizing installation work in cramped conditions, it is advisable to carry out the installation of building structures from vehicles. This will make it possible to reduce the areas allotted for storage of structures, to reduce the non-productive costs of the machine time of assembly cranes, to reduce labor intensity and to shorten the production time.

The efficiency of the use of self-propelled jib cranes during the installation of attached, built-in and connecting spans increases when they are equipped with tower-boom equipment, which provides greater freedom of maneuvering when turning the boom and its longer reach. The use of such cranes makes it possible to erect structures from parking lots located outside the constrained erected spans, and provides significant cost savings in preparing the site for production.

The scope of application of self-propelled jib cranes during reconstruction increases also when they are equipped with telescopic boom equipment. The small dimensions of such cranes in the transport position, quick putting into working condition, and the simplicity of changing the boom length create favorable conditions even for in-house assembly work.
TsNIIOMTP has developed equipment for the MKG-6,3 crane, which is a hinged parallelogram mounted instead of a boom on the crane's slewing platform with a retractable jib in the form of an upper parallelogram link.

The lifting capacity of the crane, depending on the angle of inclination of the parallelogram to the horizon, ranges from 2.7 to 3.2 t, the boom reach is from 2.06 to 8.96 m, and the lifting height of the hook is up to 7.6 m. hard-to-reach places for a conventional jib crane, provides separate horizontal and vertical movement of loads, facilitates the passage of the crane under obstacles.

On some cranes (for example, SKG-30), special types of booms with forked heads are used to lift tall columns, sling above the middle and placed inside the forked boom head. This boom design makes it possible to reduce the outreach and lifting height of the hook required for the given columns and to use a crane with a lower lifting capacity, and also creates favorable conditions for the installation and dismantling of columns while limiting the height dimensions by existing structures and communications.

One of the ways to increase the technological capabilities of jib cranes is the use of additional inventory devices capable of taking on increased loads ("derrick effect"). So, for example, it is advisable to use a shevra device in combination with crawler cranes with a lifting capacity of 25, 40, 63 and 100 tons for the installation of large-sized structures and equipment, the weight of which exceeds the rated lifting capacity of the crane. Its application allows to increase the lifting capacity of the crane by 1.5-3 times. The use of a chevron device in the context of reconstruction makes it possible to mount heavy structures when the transportation of more powerful cranes to the facility is impracticable or ineffective.

There are also other proposals for using the derrick effect to increase the lifting capacity of jib cranes.
Tower cranes are used less frequently in the reconstruction of workshops than in the construction of new facilities. This is due to an increase in unit costs for the construction of crane runways, installation and dismantling of the crane, with an increased constraint of the installation area, which limits the possibility of delivering the crane to construction site... However, the verticality of the crane tower and high altitude boom hangers allow to move the erected structures over existing ones and place them even in narrow corridors formed by existing buildings.

The invention relates to bridge construction, in particular to methods for dismantling metal superstructures of a bridge (trusses), and can be used for overhaul bridge on highways under construction or in operation.

To replace old, worn out superstructures, different methods dismantling. In this case, first of all, the technical condition of the superstructure structures and local conditions are taken into account. It would seem that the easiest and most logical way, according to the operating conditions of the structures, is to dismantle in the reverse order to the installation that was used in the construction of the bridge. But this is practically not done due to the lack of initial design data, changes in the structure itself (especially in the nodal connections), changes in the operating conditions of the structures during the long-term operation of the bridge. The dismantling and disassembly of the span structures of the lattice structure is of particular difficulty.

There is a known method of dismantling the superstructure of the bridge, which includes installation preparation for removal and removal of the superstructure. What is new is that the cutting charges are preliminarily installed in the cross section of each beam, located in the section of one of the two transverse planes symmetrically distant from the central vertical axis of the superstructure, the detonator is installed by means of at least three duplicated detonating cords, and ramps with the possibility of movement of the lateral parts along them under the action of mechanical impulses, while the removal is carried out by in-phase cutting by the method of explosive shears cross-sections superstructure beams in the indicated planes (RU No. 2171872 C1, E01D 22/00, 2001).

Of the known, the closest is the method of dismantling the lattice superstructure of the bridge, in which on the rail tracks laid on both banks perpendicular to the axis of the bridge, collapsible movable frames are installed under the superstructure to be dismantled, on which collapsible towers, cargo beams, clamps are mounted - limiters, on which hydraulic jacks (brand DG-175 with a stroke of 1100 mm) are installed and fixed, guide rods in which the upper, lifting beams are installed, pivotally resting on the heads of the hydraulic jack rods. On prefabricated movable frames, lower lifting beams are installed, located across the span with lower lifting beams passed through them, located along the span. The upper lifting beams are combined with the lower lifting beams with cargo holes with belts using rods. Hydraulic jacks gradually raise the lower lifting beams located across the span until they come into contact with the superstructure, and then the superstructure is raised to the required height. The rods of the hydraulic jacks are raised by 750-1000 mm, and when the holes in the cargo girders are aligned at this height with the holes in the cargo straps, the rods are installed in the latter. After that, the hydraulic jacks are recharged for the next lift. Hydraulic jack rods are initially lowered by 10-15 mm until the rods are released and removed from the holes in the upper lifting beams and load belts. Further, the hydraulic jack rods are lowered together with the upper lifting beams to the lower position and the holes in the cargo belts and in the upper lifting beams, in which the rods are installed, coincide. At the end of the reloading of the hydraulic jacks, the next lift is made by 750-1000 mm, while initially the lift is performed by 10-15 mm until the rods are released and removed from the holes in the cargo girders and in the cargo belts. The superstructure lifted from the supporting parts is fixed by installing rods in the holes in the cargo girders and in the cargo belts and moved on the device along the rail tracks to the extreme position, then lowered down onto the sleeper cages. The lowering of the superstructure is carried out in stages by recharging the hydraulic jacks 4 by analogy with the above-described lifting method. After installing the dismantled superstructure on the sleeper cages, dismantle the lower lifting beams located along and across the span and the connections of collapsible frames. The parts of the device, separated in this way, located on the side of the abutments of the bridge, are moved along the rail tracks to the axis of the bridge. The dismantled superstructure is lifted from the sleeper cages, moved to the axis of the longitudinal slide of the new superstructure, and lowered onto the rolling tracks. The dismantled superstructure is pushed longitudinally at a low level onto the site from the assembly of the new superstructure and disassembled (SU No. 1649016 A1, E01D 22/00, 2001).

Lattice superstructures are usually dismantled by transporting spatial trusses by barges with subsequent cutting into separate elements, or by disassembling element-wise floating cranes, or cranes moving along the superstructure. These methods are rather laborious and expensive, because do not remove the problem of element-by-element dismemberment of the superstructure after transportation afloat, or a long period of work is required when element-by-element cutting of elements on site, which in many cases must first be strengthened and then cut. Such operations must be carried out with careful monitoring of the stress state of the structure during the cutting of individual elements.

The proposed technical solution is the guaranteed implementation of the dismantling of the spatial lattice superstructure without prolonged occupation of the water area by floating means and temporary supports and ensuring the reduction of material and labor costs when performing these works due to the possibility of combining in time the operations for the downsizing of the superstructure.

This is achieved by the fact that in the method of dismantling the lattice superstructure of the bridge with a height of the upper belt above the water level up to 30-35 m and with a span of more than 40 m, including the construction of temporary auxiliary supports at the sites of division of the superstructure trusses into bulk blocks, the installation is performed hydraulic jacks on temporary auxiliary supports under the lower nodes of trusses, their temporary fixation, at least for the period of division, from vertical movement by prying with steel sheets on capital or auxiliary supports, dismantling of the carriageway in the area of ​​spatial blocks, division into volumetric blocks with a length of at least 20 m of the superstructure by cutting or cutting individual elements of the truss while ensuring the regulation of internal forces in the truss by prying and / or using hydraulic jacks installed on auxiliary supports within the limits of static loads acting in the elements of the truss that do not exceed the calculated ones, slinging, release from temporary fixation and dismantling of the isolated blocks by a floating crane with a lifting capacity of at least 80 tons with their transfer to pre-prepared receiving berths for their downsizing on the shore and dismantling of temporary auxiliary supports. In this case, the division of the farm can be done initially along the upper, then along the lower belts, starting from the upper plane of the farm. And the receiving slipways are placed on the shore, and the isolated blocks are moved on them by a floating crane immediately after their dismantling, excluding the transfer to a barge or pontoon. Alternatively, the receiving berths are placed on the shore, and the isolated blocks are moved to them by a floating crane after they have been transferred to a barge or pontoon.

Grinding, lifting and transporting pieces of concrete construction.

The technique dismantles buildings in three ways:

• Classic demolition and dismantling of monolithic reinforced concrete. Concrete buildings are destroyed by ball hits, and.
• Preliminary destruction, crushing of concrete and dismantling of reinforced concrete floors and walls.
• Dismantling of reinforced concrete, dismantling and removal of elements, dismantling of equipment. Concrete buildings often contain many products that can be reused or recycled.

After dismantling, concrete chips are possible, destruction and dismantling of reinforced concrete structures of the underground part of the building, landscape restoration, preparation of the territory for new construction.

Price demolition and dismantling of reinforced concrete structures and reinforced concrete objects

Dismantling of reinforced concrete structures: price and equipment for dismantling

Depending on the complexity and scale of the project, any equipment from the ProgressAvtoStroy vehicle fleet is used to dismantle reinforced concrete and concrete structures. We offer special equipment, teams that perform manual dismantling and dismantling of structures, machines for waste removal, earthmoving equipment for demolition and site restoration.

Dismantling of reinforced concrete supports, pillars and concrete structures with a dragline with a ball ("woman")

The impacts of a load weighing up to three tons make it possible to dismantle tall reinforced concrete structures, knock down pillars and pillars, and destroy walls and floors of concrete buildings. Such dismantling is suitable when there is no powerful metal frame inside the concrete building, and around there is enough free space for debris to fall and the possibility of the site allows the use of special dismantling equipment.

Hand held power tool for demolishing concrete buildings

For manual dismantling of reinforced concrete structures, the price is usually higher than when using technology, but the dismantling of reinforced concrete products helps to do without dangerous large-scale destruction. Plasma cutters and grinders prepare concrete structures for subsequent demolition, installers act - carry out dismantling work, cut reinforcement, separate bearing parts that interfere with the operation of machines.

Dismantling with a tool based on special equipment (hydraulic shears, hydraulic hammer)

Powerful dismantling tools quickly break and grind pieces of the structure. The equipment is suitable for dismantling at a height, performing services for the dismantling of reinforced concrete structures of any type. Hydraulic breakers, shears and buckets are often used to break concrete and brick walls, opening the base of the structure - this facilitates the demolition and dismantling of the metal frame, the reinforced concrete structure is easily folded.

Grapples, grippers, cranes and attachments: dismantling and loading concrete

The equipment is used to assist in the dismantling, disassembly and loading of fragments of reinforced concrete structures. The equipment completes the dismantling process: it lifts the reinforced concrete and large pieces of the building, takes them out of the dismantling area, and moves them to the loading or waste collection area.

Bulldozer or front loader: dismantling and waste collection

The machine is independently engaged in dismantling small buildings (for example, the demolition of reinforced concrete garages in Moscow is usually carried out by bulldozers), and on large-scale projects it is used for loading, leveling the territory. Sometimes the technique is used as a tractor, which tears off or helps to dump concrete structural elements - such dismantling is faster and safer than other methods.

Excavators: demolition and demolition of concrete

The dismantling of reinforced concrete structures is inexpensively performed - the price per cube is calculated with the subsequent loading of concrete. Excavators help to completely demolish the building, including dismantling and loading parts of underground utilities.

Dismantling of reinforced concrete structures: prices and order

Contact a representative of ProgressAvtoStroy and specify how much it will cost to dismantle reinforced concrete: supports, pillars, slabs and concrete structures in your case (see also the section). Get complete information: prices for objects (Moscow, Moscow region), deadlines for dismantling, removal of reinforced concrete. When concluding a contract, an engineer comes to the facility, draws up a concrete dismantling scheme and calculates the final cost.

• In Russia, there are many morally and physically obsolete bridges and overpasses that need to be dismantled as soon as possible. Some of them have not even been decommissioned yet, although their use poses a clear threat.
• Dismantling and dismantling of bridges and overpasses - difficult technological challenge, the implementation of which in case of violation of the technology can become a source of increased danger. At the same time, the dismantling technology depends on the structure of the structure and the building materials used in it.

Our company starts dismantling after a thorough engineering survey of the facility and the creation of a full-fledged technical documentation for the upcoming work, and when performing the work, it strictly observes all safety rules and environmental standards.
We dismantle all types of bridges and overpasses: wooden, concrete, reinforced concrete and metal - throughout Russia, which requires a well-developed dispatching service to coordinate, ensure and control the work.

Demolition and dismantling of wooden bridges
In our country, there are still many wooden bridges, not only small local bridges for pedestrians and carts, but intended for the movement of cars and trucks. Most of them were built in Soviet times, are significantly dilapidated and pose a threat to people and vehicles using them. And certainly such bridges restrain the further development of traffic flows and must be replaced as soon as possible with modern reinforced concrete structures.

Dismantling of bridges and overpasses made of concrete
Demolition and dismantling of bridges and overpasses made of concrete is a specific and rather complicated procedure that requires a well-tested and carefully observed technology, qualified performers with experience in this particular type of work, and appropriate equipment. In addition, a significant traffic flow usually passes through and under these structures, which must be competently redirected to other routes during the reconstruction, and the dismantling itself must be performed as soon as possible to reduce economic damage. If there is a railway or river track under the dismantled bridge or overpass, traffic on it must be canceled during the reconstruction, and the rails and sleepers must be placed in protective boxes intended for this to prevent damage.
When dismantling and dismantling bridges and overpasses made of concrete, our organization uses specialized equipment: demolition excavators equipped with hydraulic shears for cutting concrete or hydraulic hammers.

Dismantling of metal bridges and overpasses
All of the above about the general organization, precautions and conditions for the effective implementation of the demolition and dismantling of bridges and overpasses made of concrete is applicable to the dismantling of these structures made of metal, although specific technological operations and the technical means used are different. Our organization carries out these works with the help of specialized equipment, using, depending on the terrain and access conditions, hydraulic shears or cutters in combination with rafters and cranes.

Dismantling of reinforced concrete bridges and overpasses
General scheme the organization of work and the precautions used in the dismantling and dismantling of concrete and metal bridges are also preserved when carrying out these activities for reinforced concrete bridges. The changes relate to the technology for performing individual operations and the applied technical equipment. When carrying out this type of work, our performers use specialized demolition excavators with hydraulic shears for cutting concrete structures or with hydraulic hammers for their mechanization.

Contact us
For the demolition and dismantling of bridges and overpasses made of wood, concrete, metal and reinforced concrete, we invite you to contact our specialized construction organization, which has developed technological processes, qualified personnel and special equipment... We carry out these works in all regions of Russia, quickly, with a guaranteed high quality and by reasonable prices.
In addition to the demolition and dismantling of bridges and overpasses made of any material and any design, we carry out orders for the dismantling of residential and industrial buildings and structures for various purposes (towers, mills, bomb shelters, special structures), as well as the complete elimination of all structures left after the redeployment of military parts.

Land resources are becoming more expensive every day, with each new building. For this reason, special attention is paid today to the renewal of the fund of structures, structures and buildings. Removing unserviceable building objects can cost-effectively free up space for new buildings. The situation is the same with regard to the dismantling of bridges. Dismantling of old objects will allow building a structure using the latest technologies and increasing the throughput.

The main parsing tasks that our team solves

Among our services are the dismantling of bridges different types and configurations. Metal and concrete structures, overpasses and crossings will be dismantled as soon as possible. Work with bridge structures is carried out in accordance with the project approved by the customer. Before the start of dismantling works, an expert examination of the work object is carried out. The composition of adjacent communications is being studied, The analysis of bridges is carried out by three standard methods:

• Manual. Used for parsing metal structures planned for further use. This includes gas and plasma cutting of bridge structures;
• Mechanized. It is carried out using modern technology (excavator destroyer). The effectiveness of the technique depends on the reach of the arrow;
• The explosive method is used to destroy monolithic structures, the materials of which are not planned for further use.

You can order the dismantling of bridges of any complexity in our company. An experienced staff of specialists and technicians in all cases contribute to the solution of any, even the most impracticable tasks.

What are the reasons for dismantling bridges

According to statistical data on the territory of Russia, a large number of bridge structures are not only unsuitable for operation, but also pose a potential danger to occasionally passing cars and even pedestrians. Often, old bridges are the reason for delays in the delivery of objects.

Related services for bridges, the analysis of which is taken into account

Our clients include commercial organizations and government agencies. Regardless of the conditions of dismantling, we provide additional services for clients. Often, the old bridge is the infrastructure for the construction of new facilities. We sort the materials obtained during the dismantling of bridges, dispose of unusable structural elements and remove construction waste. The site where our team worked is almost ready for the construction of modern bridges with a large capacity. Sorted materials during work will allow customers to save money on procurement.

The cost of dismantling bridges and the timing of orders

The calculation of order execution is made on an individual basis. The complexity and urgency of the work to be done by our workers is taken into account. Regardless of the deadlines set by the customer, we comply with the process technology and the requirements of the current legislation.

Dismantling cost by type of work

Working documentation can be downloaded in pdf format (scan)

The history of the construction of the overpass

The project of organizing work on the demolition and dismantling of capital construction objects (overpass) The overpass is single-span, double-track under I, 11 main tracks. Calculation scheme- 1x5.0 m, full length of the overpass - 7.73 m, opening - 4.0 m. Distance between cabinet walls - 5.73 m.

The overpass was built in 1861 during the construction of the Moscow-Petushki line through Obiralovsky proezd in the village of Kuchino, for the passage of transport.

In 1976, the bridge was overhauled with the replacement of superstructures, according to the project No.ZHDP-7352, carried out by the Zheldorproekt Institute in 1973.

In 2002, in the immediate vicinity of the overpass, in the body of the railway embankment from the Petushki side, two road tunnels were built for the passage of vehicles.

At the moment, under the overpass, the passage for vehicles is closed, pedestrian passage is taking place.

Overpass design

Reinforced concrete overpass, single-span, double-track.

Spans - reinforced concrete, slab, two-block, design span - 5.0 m, full length - 5.6 m. No. 557, designed for C-14 load, installed in 1976, the volume of reinforced concrete of each superstructure - 10.25 m3

Supporting parts - metal, welded, flat, grade P-1 are made according to the standard design inv. No. 557

Massive stone abutments were built in 1861. Abutments length - 2.86 m. Width - 10.73 m, abutment masonry volume with foundations = 369.87 m3 Abutments are plastered.

During the overhaul of the overpass in 1976, the cabinet walls of the abutments and cordon blocks were partially dismantled, new cordon blocks were installed on the side of the second track.

Rubble concrete wings are attached to the abutments, located at an angle to the abutments, on the right side along the course of kilometers, the wings are lengthened by FBS blocks, on the left side they are conjugated with concrete retaining walls of the abutments of the III track bridge.

Shallow foundation on a natural foundation. The depth of the foundation is 2.13 m.

The path on the overpass and approaches is continuous on reinforced concrete sleepers. Rails R-65. Crushed stone ballast.

Before starting work, it is necessary to carry out the following organizational and technical measures:

Comprehensively survey structures in order to clarify the future scope of work, identify dangerous places and determine measures to ensure the safety of people. Based on the results of the survey, an act is drawn up on the basis of which the decisions of the following issues are determined (the choice of the method of disassembly, the establishment of the sequence of work, dust suppression measures, etc.);

Decide on the order, stages, demolition queues:

Disable existing communications: electricity;

Enclose the work area (construction site) with a security mesh fence;

Prohibit the admission of unauthorized persons to the site;

Prevent the entry of strangers and animals into the object;

Carry out the removal of green spaces according to the inventory lists;

The overpass dismantling project proposes to dismantle all structures by dismantling;

Complex auxiliary structures and devices.

Dismantling of the overpass is carried out in the conditions of the current railroad... This section is used by high-speed rolling stock.

To ensure safe traffic during the work, the project provides for the dismantling of the Obiralovsky overpass under the unloading packages along all three tracks.

The unloading package with an estimated length of 18.2 m with a ride on top on wooden crossbars was made according to the standard project 2176/2000.

Due to the fact that high-speed trains circulate on the site, the project provides for the installation of a pile foundation for temporary stacked superstructures made of metal pipes with a diameter of 630 mm and a wall thickness of 8 mm.

Security devices are represented by counter-drills and security corners. Pedestrian walkways on metal consoles with wooden planks are arranged on both sides of the superstructure. For the possibility of placing the superstructure on abutments No. 0 "and No. Г, on one side the sidewalk consoles are shortened and there is no railings. The sidewalk railings consist of metal posts and handrails, filled with bars round section... The elements of the superstructure are made of steel grades 15ХСНД or 10ХСНД. Elements of sidewalks, railings, diaphragms of the main beams from steel grade 16D. Support of the superstructure on abutments VU1, VU2 through movable support parts of the T2PL type according to N 2120RCH, developed by JSC "Transmost". In the lower chord and the supporting sheet of the superstructure, holes ø25mm are arranged for fastening the supporting parts. The position of the supporting parts on the grillage of the temporary abutment is fixed with stops. On abutments No. 0 "and No. G, the superstructure rests on fixed support parts of the Т2Н type according to project No. 2120RCH, developed by JSC" Transmost ". In the lower chord and support sheet of the superstructure, holes of 25mm diameter are made for fastening the support parts with bolts.

The abutments for the 3rd track are without grillage, on a pile foundation of 2 piles. Piles from a pipe ф630х8, length 7.4 m, steel ВСт20. Bollards for supporting superstructures made of I-beams No. 55B1

The abutments for the 1st and 2nd tracks are without grouting, on a pile foundation of 4 piles. Piles from a pipe ф630х8, length 7.4 m, steel ВСт20.

Temporary spans rest on a transverse girder, which, in turn, rests on piles at the edges, and in between paths on a longitudinal girder made of I-beams No. 55B

Organization of the construction site

For arrival of construction equipment on both sides of the overpass through the 1st N-th way technological races are arranged. For the arrival of technicians in the inter-track, technological platforms are arranged through the railway tracks, which are used only during the "window".

Two technological platforms for the operation of an excavator with attachments... The excavator must be parked between the paths in strict observance of the dimensions of the approach of the structure along the adjacent tracks.

To service the staff, a platform with change houses, toilets and a foreman's room is being arranged.

Technological sequence of work

Work on the construction of temporary bridges is carried out in the "windows", according to the schedule of their provision, developed in the PPR.

All work on the construction of temporary bridges is divided into two stages:

... Stage I. Construction of the pile foundations of temporary bridges.

Temporary batch superstructure (VPZ) under Sh-th way rests on a pile base in the amount of 2 pcs. from each side. Piles are met. a pipe 630 mm in diameter and a wall thickness of 8 mm and a length of 10 m. Prior to the start of the main "window", the piles are transported to the work area by an automatic machine with ADM-4 and unloaded into the pathway observing the size of the building approach.

After the start of the "window", the pile is vibrated to the design level by an excavator with attachments, a vibratory pile driver with a side grip Movax SP-40F. At the time of work on the site contact network on dismantled.

In this way, a pile foundation is made for the temporary superstructure of the 3rd track. During the operation of the excavator, the clearance along the adjacent tracks is not violated.

Similar technological sequence installation of a pile foundation and for temporary package superstructures of the 1st and 2nd tracks.

... Stage II. Installation of superstructure supports and temporary stacked superstructures.

Before the start of work, the main "window" is transported to the place of work, unloading and laying out on the site technological equipment, structures of support heads, longitudinal and transverse girders. As well as cutting continuous welts in the work area on inventory rails of 3x12.5 m along each track and joining them into rail joints.

In the main "window" with the closure of traffic on the Sh-th track by the track-laying crane UK-25SP, the upper structure of the track is dismantled with the loading of the links onto the cover platform. After dismantling the first link, the excavator begins to dismantle the soil to the design level for cutting pipe piles, installing their heads and supporting beams.

After dismantling the track superstructure, the track-laying crane is retracted to a safe distance of 50 m. After that, a team of workers begins to cut the ballast trough.

In parallel with these works, the construction of the pile foundation is being carried out on the opposite side.

After cutting the ballast trough, a track-laying crane is brought in and the existing superstructure of the 3rd track is torn off and dismantled with loading onto the covering platform.

After dismantling the existing superstructure of the 3rd track, the tracklayer is retracted to a safe distance, the platform is uncoupled with the superstructure of the track and the existing superstructure. Then the platform is transported to the place of unloading at the base of the local FC or PMS.

After that, the second set is fed to the crane by a cover platform with a submerged temporary package superstructure and a bridge deck.

In parallel with these works, the construction of the pile foundation and the installation of the support girder continue, as well as the cutting of the top of the cabinet wall by a backhoe loader with attachments, a hydraulic hammer to the design level. The crossbar is mounted by an excavator boom from the path to the design position.

After finishing works on construction and cutting of concrete at the top of the cabinet wall, a track-laying crane is brought in, which mounts a temporary package superstructure on the track axis.

At the final stage, the sinuses are backfilled with crushed stone, the installation of the bridge deck, security devices, the restoration of the contact network

Installation of temporary bridges under the I-th and N-th tracks is carried out in the "window" to be carried out with the closure of traffic on both tracks. The dimension along the Sh-th path is not violated.

The rest of the work is carried out in the same sequence.