RU2298611C2 - Prefabricated bridge - Google Patents

Abstract

FIELD: mechanical engineering; bridge building.

SUBSTANCE: proposed structure contains extreme and middle longitudinal beams adjoining each other and consisting of three-dimensional middle sections connected widthwise the bridge by dovetail joints. External parts of said butt joint are located on longitudinal sides of extreme sections from both sides, and internal ones are located on longitudinal sides of middle sections from both sides and on guards, and widthwise bridge framework by means of displacement of extreme sections relative to middle sections and protective guards in longitudinal direction by half of length of said sections. Hinged stop plate is installed between neighbor sections in cross direction and between sections and protective guards. Hinge-plates are arranged in slots of neighbor sections.

EFFECT: facilitated assembling and disassembly of bridge, reduced labor input.

2 cl, 3 dwg

Description

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

Known folding bridge, including a span of three adjacent to each other longitudinal beams.

However, the known design has a complex butt connection of the bridge sections. As a result, the complexity of the assembly and disassembly of the bridge increases.

The objective of the invention is to simplify the butt connection of the bridge sections, reducing the complexity of the Assembly and disassembly of the bridge and ensuring sufficient structural strength of the bridge.

The problem is solved in such a way that a collapsible bridge, including the extreme and middle longitudinal beams adjoining one another, consisting of spatial sections, according to the invention, sections along the width of the bridge are connected by a dovetail butt connection, the outer parts of which are located on the longitudinal sides of the extreme sections on both sides, internal on the longitudinal sides of the middle sections on both sides and on the security barriers, and along the span by displacing the extreme sections relative to the middle sections and lateral barriers in the longitudinal direction by half the length of these sections, while between the adjacent sections in the transverse direction and the sections and the protective barriers mounted hinged locking plate.

In addition, new in the device is that the hinged plates are located in the grooves of adjacent sections.

Figure 1 shows a collapsible bridge; figure 2 is the same, plan view without ramps; figure 3 is a section aa in figure 1.

The collapsible bridge includes a span 1 of three rows of longitudinal beams.

Each longitudinal beam consists of spatial sections 5 connected along the length of the bridge by means of a butt joint 6, 7 of the "dovetail" type and a locking plate 8. At the extreme sections 2 and 4, security barriers 9 are fixed.

For the hard closure of the three longitudinal beams 2-4 of the span structure 1 into a single system with a continuous carriageway and with the middle beam 3 included in the work for general bending, longitudinal dovetail devices 6, 7 are used, the internal joints of which are located on the middle sections 3, and to close the beams along the width of the span, the extreme sections 2, 4 are displaced relative to the middle sections 3 and the security barriers 9 in the longitudinal direction by half the length of these sections, as well as between the adjacent sections in the transverse direction Government & sections and protective barriers 9 mounted hinged locking plate 8.

The closure of the beams of the superstructure of the bridge is carried out in the following sequence.

When assembling the bridge, the end sections are inserted into the butt joint of the middle sections 3, moving them in the longitudinal direction by half the length of the sections, and the hinged locking plates 8 are lowered, and the safety barriers are inserted into the butt joint of the end sections 2, 4 so that their joints are also offset in the longitudinal direction by half the length of the sections.

To open the sections before dismantling the bridge, the hinged locking plates 8 are lifted from the grooves of the sections 2-4 and the protective barriers 9 are disconnected from the butt joints of the outer sections 2, 4, and then the outer sections are pulled out from the butt joints of the middle sections 3.

Collapsible reinforced concrete structures can serve as entry and exit ramps.

Claims (2)

1. A collapsible bridge, including the extreme and middle longitudinal beams adjacent to one another, consisting of spatial sections, characterized in that the sections along the width of the bridge are connected by a dovetail butt joint, the outer parts of which are located on the longitudinal sides of the extreme sections on both sides, internal - on the longitudinal sides of the middle sections on both sides and on the security barriers, and along the span by displacing the outer sections relative to the middle sections and side barriers in Aulnay direction - half the length of these sections, wherein the sections between adjacent transversely and protective barriers sections and mounted hinged locking plate. 2. The collapsible bridge according to claim 1, characterized in that the hinged plates are located in the grooves of adjacent sections.

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