RU141327U1 - METAL BRIDGE - Google Patents

Abstract

The metal bridge contains a number of spans with riding on top, mounted on intermediate and shore supports and each made in the form of two parallel blocks of the span from a set of collapsible bridge MARM, consisting of blocks of the span and shore blocks, with the formation of a one-way carriageway equipped with a wheel breakdown and railings, as well as elements of the union of supports in the form of longitudinal and transverse ties, characterized in that the third block the flight structure from the MARM collapsible bridge kit, while the spans are equipped with drainage trays on the outside, the railings and barriers are made with a normalized height, and the pedestrian walkways are with a normalized width corresponding to the height of the barriers and the width of the pedestrian walkways of the permanent bridges, all the blocks of the spans combined at the joints by monolithic and welds, and on top of the flooring made of orthotropic plates, an asphalt concrete coating was laid along the drain triangle with a slope in the transverse th direction, and the intermediate and coastal supports are made constant.

Description

The utility model relates to bridge construction, in particular to permanent metal road bridges.

Known metal small road collapsible bridge - MARM, designed for the military construction of temporary bridges, viaducts, overpass sections, containing spans with riding on top, mounted on supports with the formation of a single-track passage (see Small road collapsible bridge, Technical description and instruction manual, - M .: Military Publishing, 1982, p. 3-34).

The disadvantage of this design is that such a bridge cannot be used as a permanent metal bridge without adaptation.

A known design of a metal bridge, including a number of spans located on intermediate and extreme supports and made in the form of two parallel longitudinal blocks from a set of collapsible bridge SARM, consisting of middle and end sections and having an orthotropic plate as a deck with the formation of a double-track carriageway and made in the form of cantilever blocks, pedestrian walkways along the edges, equipped with railing and dividing barriers, as well as fastening elements for sections and cantilever blocks, the last e include an orthotropic slab with struts, characterized in that a third intermediate block from a collapsible bridge set of САРМ is additionally introduced into each span structure, and cantilever blocks are made in length corresponding to the length of the middle and end sections of longitudinal blocks from a set of collapsible bridge САРМ, while span buildings are installed with a slope in the transverse direction and are equipped with drainage chutes from the side of the cantilever blocks, railings and dividing barriers are made with a normalized height, and foot walkways - with a normalized width corresponding to the height of the fences and the width of the pedestrian walkways of the permanent bridges, all sections and cantilever blocks are joined at the joints of the orthotropic plates by means of welds, and an asphalt concrete coating is laid on top of the orthotropic flooring, the intermediate and extreme supports being made constant, inter-joint the seams above the supports are sealed by deformation, and the fastening elements of the sections and cantilever blocks are not removable (see Utility model of the Russian Federation No. 68525, Metal bridge (options), priority November 27, 2007).

The disadvantage of this design is that such a bridge is not cost-effective on small rivers as a permanent metal bridge, the high complexity of the assembly into a single structure, high operating costs.

As a prototype, a metal small road collapsible bridge was adopted, then MARM, which contains a number of spans with riding on top, installed on intermediate and coastal supports, from which temporary bridges, overpasses, overpass sections are erected, with a maximum span of 9.3 m for single-track traffic with a size of 4.2 m (see Small Road Collapsible Bridge, Technical Description and Operating Instructions, - M.: Military Publishing House, 1982, p. 3-34).

Recently, MARM kits appeared on the domestic market of the Russian Federation in order to sell the released movable military property. However, from the point of view of their use for the construction of permanent bridges on public roads, they have the following disadvantages: low carrying capacity, insufficient dimensions to ensure safe traffic permit, dangerous operating conditions, lack of asphalt concrete pavement and drainage system, mismatch of design and height of the barrier and rail fencing requirements of SP 35.13330.2011.

The utility model is based on the problem of the possibility of using existing prefabricated metal structures of collapsible bridges MARM for the construction of permanent bridges in accordance with the requirements applicable to them.

The task is achieved in that in the construction of a metal bridge containing a number of superstructures with riding on top, mounted on intermediate and coastal supports and each made in the form of two parallel blocks of the superstructure from a set of collapsible MARM bridge, consisting of superstructures and coastal blocks, with the formation of a single-track carriageway equipped with a wheel chute and railings, as well as elements of the union of supports in the form of longitudinal and transverse connections, according to the utility model a third block of a span structure from a set of a collapsible bridge MARM was additionally introduced into the spans, while the spans are equipped with drainage trays on the outside, railings and barriers are made with a standardized height, and pedestrian walkways with a standardized width corresponding to the height of the fences and the width of pedestrian passages of permanent bridges, all span blocks are joined at the joints by monolithic and welds, and asphalt is laid on top of orthotropic flooring concrete coating along the drain triangle with a slope in the transverse direction, and the intermediate and coastal supports are made constant.

The solution of the technical task is achieved through the use of existing prefabricated blocks from the MAPM collapsible bridge set during the construction of the superstructures and the adaptation of the superstructures to the current standards by the additional introduction of the third superstructure from the Marm collapsible bridge kit. The newly introduced span blocks along with a number of additional design features, namely, along with the fact that on top of the flooring of orthotropic plates an asphalt concrete coating was laid along the drain triangle with a slope in the transverse direction and equipped with drainage chutes from the outside that the intermediate and coastal supports were made permanent, that all blocks of superstructures are joined at the joints by monolithic and welds - all of the above allows for the construction of a permanent m a skeleton that complies with the applicable standards for load, dimensions of carriageways and pedestrians, and for safety using prefabricated collapsible bridges from the MARM kit.

The essence of the utility model is illustrated by drawings, where in FIG. 1 - presents a General view of a permanent bridge using elements from a set of collapsible bridge MARM; in FIG. 2 - shows a cross section AA in FIG. one; in FIG. 3 - shows a cross section BB in FIG. one.

The metal bridge using the elements from the MAPM collapsible bridge kit (see Fig. 1) is a beam bridge with several spans of a split or continuous system with a maximum possible spans of 9.3 m. It contains spans 1 using elements from the Marm collapsible bridge kit , intermediate supports 2, shore supports 3 and approaches 4.

The design of each span 1 of the metal bridge in cross-sections A-A and B-B (see Fig. 2, Fig. 3) contains two parallel standard span blocks 5 and 6 from the MAPM collapsible bridge kit. Each span block is a spatial welded structure consisting of two main longitudinal beams, three intermediate longitudinal beams, two end and ten intermediate transverse beams (not shown in the drawing), a roadway sheet 7, which is a floor reinforced with welded belts and at the same time an upper a belt of longitudinal and transverse beams, forms an orthotropic plate. It turns out a single-track carriageway as a result of the assembly of two spans 5 and 6, equipped with a wheel break (not shown in the drawing), and railings 8. To connect the blocks of the spans to each other in the transverse direction, connecting lanyards are used, and to maintain the distances between the blocks in the longitudinal metal templates are installed at a distance (not indicated in the drawing), also used from the Marm collapsible bridge kit.

According to the utility model, a third block of the span structure 9 from the set of the collapsible bridge MARM (see Fig. 2, Fig. 3), similar to the standard blocks of the span structure 5 and 6, is additionally introduced into each span 1.

In this case, the blocks of spans 5 and 9 at the edges are equipped with drainage chutes 10. The railings and barriers 8 and 11, respectively, are made with a normalized height, and pedestrian walkways 12 with a standardized width corresponding to the height of the barriers and the width of the pedestrian walkways of permanent bridges. All blocks of the spans 5, 6 and 9 of the buildings are joined at the joints by monolithic 13 and welds, and an asphalt concrete coating 14 with a slope in the transverse direction is laid on top of the floor 7 from orthotropic plates, and the intermediate 2 and shore 3 supports are made constant.

Thus, the use of the proposed technical solution allows the design of the metal bridge to ensure that the span load capacity and the size of the carriageway with sidewalks are established in accordance with SP 35.13330.2011, the safety of vehicles and safe passage of pedestrians, the conditions for smooth passage of vehicles along the road, protection of supports from the penetration of precipitation on them.

The utility model allows the use of existing prefabricated metal structures of collapsible bridges MARM for the construction of permanent bridges, in accordance with applicable standards.

Claims (1)

The metal bridge contains a number of spans with riding on top, mounted on intermediate and shore supports and each made in the form of two parallel blocks of the span from a set of collapsible bridge MARM, consisting of blocks of the span and shore blocks, with the formation of a one-way carriageway equipped with a wheel breakdown and railings, as well as elements of the union of supports in the form of longitudinal and transverse ties, characterized the fact that the third block of the span structure from the MARM collapsible bridge kit was additionally introduced into the spans, while the spans are equipped with drainage chutes from the outside, the railing and barrier fences are made with a normalized height, and pedestrian walkways with a normalized width corresponding to the height of the fences and the width of the pedestrian walkways of permanent bridges, all blocks of spans are joined at the joints by monolithic and welds, and on top of the flooring made of orthotropic plates sphalet-concrete coating along the drain triangle with a slope in the transverse direction, and the intermediate and coastal supports are made constant.

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