SU1138446A1 - Span structure of dismountable bridge - Google Patents

Abstract

FLIGHT STRETCH STRUCTURE, containing spatial middle and end blocks formed by the main beams of the roadway structure and connections, combined in length and width of the span using lower and upper longitudinal and transverse docking devices, characterized in that, in order to extend the range of lengths overlapped spans by the light location of the blocks, the span is provided with overlaid elements combining the blocks of the upper and lower rus, each of which is located diagonal of the side face of the corresponding pair of upper and lower tiers of blocks and connected with adjacent patch elements in the longitudinal connecting devices by means of pins, the overhead on the facade elements are arranged in a triangular bridge (A lattice.

Description

The invention relates to bridge construction and can be used in the construction of collapsible structures as a block design, as well as in combination with a truss or a wire reinforcement system.

The span bridge of the collapsible bridge is known, which includes the spatial end and middle blocks formed by the main beams, the roadway structure and the connections, combined in length by means of eyelets of lower and upper docking devices made in the form of lugs with locking pins, and lower by width and upper transverse docking devices, with the transverse docking devices made in the form of three lengthwise adjustable docking systems mounted on adjacent blocks, longitudinal docking devices olozheny within the longitudinal dimensions of blocks in the level of the upper and lower chord members of the main beams, and the structure comprises a removable roadway console brackets and made of a metal sheet, reinforced by stiffeners ij.

The disadvantage of this span structure lies in the complexity of its design, which in addition to the blocks contains removable consoles and brackets, as well as transverse docking devices in the form of adjustable grids, which leads to significant difficulties in terms of compact storage of the property, interchangeability of blocks when they are damaged, and the inability to use the span in a wide range of span lengths.

The closest to the invention to the technical essence is the span of the dismountable bridge, comprising the spatial middle and end blocks formed by the main beams, the structure of the carriageway and connections, combined along the length and width of the span by means of lower and upper longitudinal and transverse docking devices 2 .

A disadvantage of the known span structure is the impossibility of building bridges of increased length (over 20 meters) due to the limited strength of the span structure assembled from blocks in one Russian, as well as in the difficulty of assembling the span structure of increased strength by installing blocks of alternates on the other in two batches.

The purpose of the invention is to expand the range of lengths of overlapping spans by the light location of the locks,

This goal is achieved by the fact that the span of the collapsible bridge, containing the spatial middle and end blocks formed by the main beams, the structure of the carriageway and connections, combined in length and width of the span by means of lower and upper longitudinal and transverse docking devices. equipped with overlapping elements of the combination of the blocks of the upper and lower Rus, each of which is located diagonally on the side face of the corresponding pair of blocks of the upper and lower Rus and soy Inonii overlaid with adjacent elements in longitudinal connecting devices prii aid of pins and false elements are arranged on the facade of the bridge in a triangular lattice.

- Figure 1 shows a schematic of one light-weight flying structure along the facade of the bridge; in FIG. 2, node I in FIG. 1; fig.Z - the same in terms of; in FIG. 4, one straight wheelless span, cross section; in FIG. 5 a one-track gauge span, cross section; in FIG. 6. - invoice item; Fig, 7 two-span span on the facade of the bridge; FIG. 8 is the same cross section. The span structure of the collapsible bridge contains end 1 and middle 2 spatial blocks formed by the main beams 3, the construction of the carriageway 4, for example, in the form of a grating. The end and middle blocks are combined along the length of the bridge by means of the lower 5 and upper 6 longitudinal docking devices made in the form of lugs 7 with locking pins 8, the lower and upper docking devices 5 and 6 protrude beyond the longitudinal dimensions of the end and middle blocks 1 and 2, and their axes are equal to the axes of the main beams. The width of the bridge blocks 1 and 2 are combined by means of the lower 9 and upper 10 docking devices, made in the form of protruding beyond the transverse dimensions of the block 1 and 2 of the lugs 11 with locking pins 12,

The lower 13 and upper 14 blocks of the superstructure are interconnected by means of patch elements 15, located obliquely along the side faces of the superstructure, fastened to the blocks through holes in the lugs of the longitudinal joints 7, and in the patch elements 16 by means of pins 8.

The overhead elements 15 can also be used as wheel breakers 17, which are mounted on both sides of the span and secured to the upper transverse docking devices 10 by means of eyelets 18, in the overlay elements 15 by means of pins 12.

The proposed span has the largest changes compared to the known, which

easy to make in already made trees.

The use of the proposed device allows to expand the functional possibilities of using the blocks, to ensure the assembly of temporary bridges of significantly longer length and greater carrying capacity while maintaining all the advantages inherent in the known construction.

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Claims (1)

SPAN STRUCTURE OF A DRAWABLE BRIDGE, comprising spatial middle and end blocks formed by the main beams with a roadway structure and connections, combined along the length and width of the span with the help of lower and upper longitudinal and transverse docking devices, characterized in that, in order to expand the range of lengths overlapping spans by tiered arrangement of blocks, the span structure is equipped with overhead elements for combining blocks of upper and lower tiers, each of which is located diagonally or a side face of the corresponding pair of blocks of the upper and lower tiers and is connected to adjacent overhead elements in the longitudinal docking devices using pins, the overhead elements being located. <g of the wife along the facade of the bridge in the form of a triangular-1 “lattice. to