RU2509186C2 - Mobile span of bridge and method for its transportation and assembly - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method for transportation and assembly of a bridge span is determined by span design. The mobile bridge span comprises a traffic area made of longitudinal middle main block and two side cantilevers, each made as capable of folding to the middle above the traffic area and is hingedly connected by longitudinal edges to the main block. Each side cantilever of the traffic area is equipped with a pavement cantilever hingedly connected to the free longitudinal edge of the side cantilever as capable of folding above the traffic area, and the main block comprises two bearing beams of double-tee type with support surfaces in the extreme lower position. Each side cantilever of the traffic area is equipped with a folding longitudinal bump stop. Each pavement cantilever is equipped with a folding railing barrier. The main block comprises a rail track, besides, the top of the rail head does not protrude the level of the traffic area. The rail track may be set for a track of 1520 mm and a track of 1435 mm.

EFFECT: using the invention makes it possible to increase efficiency and to simplify assembly works as a span is installed in a bridge structure, to expand its functional capabilities.

8 cl, 4 dwg

Description

The invention relates to bridge construction and can be used in collapsible bridges.

A known method of mounting the span of the bridge with bulk blocks of large mass, which relates to the field of technology for the construction of bridges and can be used in the construction of bridges with a span of metal (patent RU No. 2260650, IPC E01D 21/00, 11.24.2004). The method of mounting the bridge span with volumetric blocks includes the assembly, welding and enlargement of volumetric blocks in conductors placed on the ground. The installation of the first of them on the main support is carried out by an installation crane. Prior to installing the first enlarged volumetric block on the main support on the foundation edge of the specified capital support, four support posts are installed and fastened together by ties, providing stability to the first mounting block installed on the main support. Then, at a distance between the axes of the supports, not less than the sum of half the length of the installed and the length of the installed block, next to the main support along the axis of the span, a temporary support is mounted and a second enlarged volumetric block is lifted, which is joined with the first end to the first, and the second end is supported on the specified temporary support. Subsequent temporary supports are installed no earlier than under every third volumetric block based on the bearing capacity for bending of the mounted span.

A known bridge and method of mounting a metal box-shaped span of this bridge (patent RU No. 2397287, IPC E01D 1/00, 06/26/2009). The bridge includes abutments, intermediate supports and a metal box-shaped span with support sections of increased height, consisting of an orthotropic driveway plate, supported by longitudinal beams, interconnected by transverse connections and support diaphragms. New is that in the heads of the abutments and intermediate supports longitudinal openings are made with a depth equal to the height of the supporting sections, and the metal box-shaped span is made in the supporting zone two-tier, and the upper tier in the cross section is equal to the width of the carriageway of the bridge, has a constant height along the entire length bridge and is equipped with external and internal longitudinal beams, interconnected in the lower plane of the ribbed slab. The lower tier is located in the longitudinal openings of the intermediate supports and consists of longitudinal beams joined in height with the inner longitudinal beams of the upper tier and interconnected in the lower plane of the ribbed plate. The supporting parts of the upper tier of the superstructure are mounted on the heads of the intermediate supports coaxially with the outer longitudinal beams of the upper tier, and the supporting parts of the lower tier are located in the longitudinal openings of the abutments and intermediate supports coaxially with the longitudinal beams of the lower tier. A method of mounting a metal box-shaped span of a bridge with supporting sections of increased height consists in constructing a slipway with a pushing device, installing skating paths on the supports and heads of intermediate supports, assembling sections of a box-shaped span on a slipway, installing an outback on the cantilever section and then sliding them into the span. What is new is that a two-tier box-shaped span structure is assembled on a slipway at full height, including support sections, mounted on abutments and head ends full-time supports of the ski path coaxially with the outer longitudinal beams of the first tier and carry out longitudinal sliding of the two-tier span, freely moving the lower tier of the metal box-span, forming supporting sections of increased height, through the longitudinal openings of abutments and intermediate supports.

A common drawback of the above technical solutions is the difficulty of installing spans in a bridge structure, the complexity and length of assembly operations, the need for additional and special assembly equipment and generally low efficiency of the work performed.

Known prefabricated metal span bridge with riding on top to pass railway and road loads, which consists of a spatial block of the internal circuit mounted on the spatial block of the external circuit, and pivotally connected in the upper zone by horizontal connections. In this case, the inner beam transfers the load to the longitudinal beams of the lower orthotropic plate of the outer beam only at four points through the bearing device. Thus, the internal beam according to the static scheme is a continuous three-span beam, which increases its rigidity, and the bending moment decreases in the external main beam. This provides a rational distribution of loads and a decrease in metal consumption in the whole span. The optimal distance between the bearing devices is: in the middle between the second and third - 0.4-0.6 span lengths; between the first and second, third and fourth - 0.2-0.3 lengths. EFFECT: reduction of labor costs for laying a bridge web and, by implementing a longitudinal slide method without using a long back-up and intermediate supports, reducing the metal consumption of the structure (patent RU 93819, MPK E01D 2/00, 12/11/2009).

The span of the collapsible bridge is known, which is taken as a prototype, which consists of a pickup beam and individual bridge sections that are connected to each other and are pushed along it, which are made of the central and two side parts, articulated to each other with the possibility of folding under the middle part and unfolding from under her. The middle bridge sections are equipped with movable lower belts connected to the U-shaped part of the beams by means of telescopic racks with the possibility of fixing in the lower (open) position. The lower belts of the intermediate sections are pivotally fixed at one end to the section, while others can be lowered and fixed by a telescopic stand. The lower belt of the extreme sections is fixed to the beam rigidly. The span of a collapsible bridge of this design can be installed on an obstacle with both lowered and undescended lower belts of U-shaped beams of middle and intermediate sections (patent RU 2055107, IPC E01D 15/12, 05/18/1993).

A mobile bridge span structure is known that comprises a carriageway consisting of a longitudinal middle main block (of two ruts) and two side consoles, each of which is foldable to the middle and pivotally attached by longitudinal edges to the main block with the possibility of folding above the main block of the carriageway parts (see SU 446576 A1, 10/15/1974).

The disadvantages of these technical solutions, the last of which is taken as a prototype, are the need for, low efficiency and complexity of installation work when installing the span at the place of use, insufficient strength and reliability of the structure associated with the presence of loaded telescopic joints, the violation of which can lead to a complete loss bearing capacity and stability of the span. When transporting it on structural elements to the place of use in the folded state, their deformation and difficulty in installation at the place of use are possible.

The technical result from the use of inventions is to eliminate or reduce the above disadvantages of analogues and prototype and consists in increasing the efficiency and simplification of installation work when installing a span in a bridge structure, increasing the manufacturability of bringing the span into working position from transport and back, as well as in expanding the functionality of the span compared to the prototype due to the simplification of the installation and the elimination of its deformation in the process transportation to the place of use and the provision of the possibility of train, road and track loads without reorganization of the carriageway of the superstructure.

To achieve a technical result in a mobile bridge span containing a carriageway, consisting of a longitudinal middle main block and two side consoles, each of which can be folded to the middle above the carriageway and pivotally attached by longitudinal edges to the main block, each side console is a carriageway part is equipped with a sidewalk console pivotally attached to the free longitudinal edge of the side console with the possibility of folding over the roadway, and the main block contains weighting beams of I-beam type with supporting surfaces in the lowest position. The top of the beams is recessed relative to the top of the roadway.

In addition, each side console of the carriageway is equipped with a folding longitudinal chipper.

In addition, each sidewalk console is equipped with a folding railing.

In addition, the main unit contains a rail track, and the top of the rail head does not protrude beyond the level of the carriageway.

In addition, the rail has the ability to build for 1520 mm gauge and 1435 mm gauge.

In addition, the carriageway is coated with a polymer thin-layer coating to provide structural protection when transmitting tank load.

In addition, the end surfaces of the main unit and side consoles are equipped with flange connections for joining into a continuous system with other spans of the bridge during installation using the longitudinal slide method.

The indicated technical result is also achieved by the method of transportation and installation of the bridge span, which consists in using a mobile bridge span having a bearing bearing surface in the lowest position and the possibility of folding the carriageway into the size of the shipping dimension of a motor vehicle and a railway vehicle, and in the process transportation and installation establish the span of the bridge on the specified bearing support surface.

Figure 1 presents a General view of the mobile span.

Figure 2 is a side view of a mobile span.

Figure 3 shows a cross section of a mobile span in the working position on the bridge supports.

Figure 4 shows a cross section of a mobile span when folded for transportation.

The mobile bridge span 1 comprises a carriageway 2 consisting of a main unit 3 and two lateral (automobile) consoles 4, each of which is foldable to the middle and pivotally attached by longitudinal edges 5 to the main unit 3. The main unit 3 is provided with lateral support surfaces 6, and each console 4 is a corresponding reciprocal longitudinal supporting surface 7 and is made with the possibility of folding over the carriageway, as shown in figure 4. This embodiment improves the manufacturability of bringing the span into working position from the transport and vice versa, the span structure and simplifies transportation and eliminates the deformation of structural elements of the carriageway during transportation to the place of use, makes the span structure completely ready for operation, eliminating its improper assembly and I will lose during transportation and storage of components. The main unit 3 contains at least one orthotropic plate 8 with a strip supporting rib 9 in the lowest position under the carriageway, which uniquely determines the installation location of the span structure on the vehicle. Each console 4 of the carriageway is equipped with a pavement console 10 pivotally attached to the free longitudinal edge 11 of the console 4 with the possibility of folding over the carriageway, which also eliminates their deformation during transportation. Each console 4 of the carriageway is equipped with a longitudinal bump 12 to increase the safety of passage through the bridge structure and to prevent entry to the pedestrian part of the superstructure. Each paving console is equipped with a folding railing 13. The main block 3 contains a rail 14, and the top of the rail head 15 does not protrude beyond the level of the carriageway 2, the carriageway can be coated with a polymer thin-layer coating. The end surfaces 16 of the main unit and side consoles are equipped with flange connections 17 for mounting with other bridge spans using a longitudinal slide method, which increases the efficiency and adaptability of installation work when installing the span in a bridge structure.

The method of transportation and installation of the bridge span is that the mobile bridge span having a bearing bearing surface in the lowest position and the ability to fold the carriageway into the size of the vehicle’s shipping dimensions before transportation, is placed on the vehicle with support on the same surface , on which the span is installed during installation during the formation of the bridge structure 18. This provides increased efficiency and simplified installation during installation of the superstructure in the bridge structure, and also exclude its deformation under the influence of its own weight during transportation.

A specific embodiment of the invention is presented below.

The span is the main structural element of the collapsible bridge-overpass IMZH-500.

The span is a fully transportable vehicle with full factory readiness, in its design provides the ability to pass train, road and track loads without restructuring the roadway.

The span of the flyover is a split type with direct attachment of rails to the main beams. The length of the span is 12.5 m. Passage of railway rolling stock with a gauge of 1520 and conversion to a gauge of 1435 mm is possible along the spans. The height of the wall of the main beam is 0.8 m. In cross section, the span consists of one block of the main beam, two consoles of the roadway and two sidewalk consoles. The main beam is the main supporting element of the superstructure. The driveway consoles have a hinge connection to the main beam, the sidewalk consoles also have a hinge connection to the driveway consoles. To ensure the convenience of driving automobile and caterpillar loads, the top of the rail head does not protrude beyond the level of the carriageway, and a folding barrier is located at the edges. The roadway in order to prevent damage during movement of the loads, as well as to improve corrosion protection, is covered with a polymer thin-layer coating of Polimast-T. Metal boards are placed on the sidewalk consoles. Ribs of orthotropic plates are strip. The span is overall for shipment by rail (gauge 02-VM) and automobile (in gauge in compliance with traffic regulations of the Russian Federation) transport.

Dimensions of the carriageway of the railway passage 1C, for the movement of automobile and caterpillar loads - 3.8 m. Sidewalks 0.75 m wide.

Spans have the ability to combine when installed in a continuous system using flange connections. On spans, laying of rails of the P65 type and, if necessary, P50 with modified fixtures is provided.

Span material:

- for the main elements - steel 12G2SBD according to STO-13657842-1-2009;

- For mechanical parts (mounting blocks, cotter pins, bolts, nuts, washers, etc.), modern high-strength engineering alloys and steels were used;

- for auxiliary elements - steel 09G2S GOST 19281-89.

Design load:

railway - 26.45 tf / axle (10.58 tf / m);

tracked - NG 60;

automobile - A11.

Thus, a technical result is achieved from the use of the invention, which consists in increasing the efficiency and simplification of installation work when installing a span in a bridge structure, increasing the manufacturability of bringing the span to its working position from transport and back, and also in expanding the functionality of the span due to simplifying installation and eliminating its deformation during transportation to the place of use and providing the possibility of train omobilnoy and track loads without rebuilding the roadway span.

Claims (8)

1. Mobile bridge span containing a carriageway, consisting of a longitudinal middle main block and two side consoles, each of which is made with the possibility of folding to the middle above the carriageway and pivotally attached by longitudinal edges to the main block, characterized in that each side console the carriageway is equipped with a pavement console pivotally attached to the free longitudinal edge of the side console with the possibility of folding over the carriageway, and the main unit contains two load-bearing beams for utavrovogo type with bearing surfaces at the lowermost position. 2. The mobile bridge span according to claim 1, characterized in that each side console of the carriageway is provided with a folding longitudinal chipper. 3. The mobile bridge span according to claim 1, characterized in that each sidewalk console is equipped with a folding railing. 4. The mobile span structure of the bridge according to claim 1, characterized in that the main unit contains a rail track, and the top of the rail head does not protrude beyond the level of the carriageway. 5. The mobile bridge span according to claim 4, characterized in that the rail has the ability to build for 1520 mm gauge and 1435 mm gauge. 6. The mobile bridge span according to claim 1, characterized in that the carriageway is coated with a polymer thin-layer coating to ensure protection of the structure when transmitting tank load. 7. The mobile bridge span according to claim 1, characterized in that the end surfaces of the main block and side consoles are provided with flange joints for joining into a continuous system with other bridge spans during installation using a longitudinal slide method. 8. The method of transportation and installation of the bridge span, which consists in using a mobile bridge span having a bearing bearing surface in the lowest position and the ability to fold the carriageway into the size of the shipping dimension of a road and railway vehicle, and during transportation and installation establish the bridge span on the specified bearing supporting surface.

Images