CN203625760U

CN203625760U - Large-span assembly type highway steel truss bridge

Info

Publication number: CN203625760U
Application number: CN201320682648.2U
Authority: CN
Inventors: 胡大虎; 易良华; 陶闯; 袁静静; 滕吉成
Original assignee: China Harzone Industry Corp Ltd
Current assignee: China Harzone Industry Corp Ltd
Priority date: 2013-11-01
Filing date: 2013-11-01
Publication date: 2014-06-04
Anticipated expiration: 2023-11-01

Abstract

The utility model discloses a large-span assembly type highway steel truss bridge, wherein an erected single span can reach 90m. The large-span assembly type highway steel truss bridge comprises a left truss and a right truss. Cross beams are arranged between the left truss and the right truss. A wind-proof pull rod and a vertical wind structure are arranged between every two adjacent cross beams. A bridge deck slab is arranged above the cross beams. Reinforcement chord members are arranged on upper chords and lower chords of the trusses. The large-span assembly type highway steel truss bridge is characterized in that the distance between pin holes in the height direction of the trusses ranges from 2400mm to 2800mm; the distance between pin holes in the length direction of the trusses ranges from 5800mm to 6000mm; the sections of the upper chords and lower chords of the trusses, the section of the vertical rod, the section of a diagonal rod and the sections of the reinforcement chord members are square tubes or rectangular tubes. The large-span assembly type highway steel truss bridge solves the problem that an existing assembly type steel bridge is small in span and large in deflection.

Description

A kind of large span assembling highway steel truss bridge

Technical field

The utility model relates to a kind of assembly type steel bridge on highway, particularly large span assembling highway steel truss bridge.

Background technology

It is 50 meters across footpath that the general maximum of current existing assembly type steel bridge on highway is set up single span, if need set up more greatly across footpath time, must set up provisional steel buttress, but under the river course or the middle very dark this orographic condition in gully that The water is deep and the current fast, build provisional bridge pier, expense is large, and the cycle is long, and existing assembly type steel bridge on highway is difficult to meet user's demand.

As: in February, 2013, Henan company collapsed in the speedway prosperous bridge half range of justice track suddenly, traffic is not smooth, bridge pier is up to tens of rice, need to rob the bridge of 80 meters of single spans of frame, and need within 1 week, be open to traffic, and existing bridge equipment cannot meet the demands, through in many ways detecting and expert evaluation, permission can only be current at another half range track speed limit freight weight limit, has a strong impact on traffic in red-letter day.

Utility model content

The utility model, for addressing the above problem, proposes a kind of single span span length and reaches 90 meters, and simple in structure, set up large span assembling highway steel truss bridge fast.

The utility model is realized by following scheme:

A kind of large span assembling highway steel truss bridge, includes left truss and right truss, between left truss and right truss, is provided with crossbeam, between adjacent two crossbeams, is provided with wind-resistant pull rod and vertical wind structure, is provided with bridge deck on crossbeam; Described left truss and right truss all can be single truss or arrange truss more, if main truss is single truss, between truss and crossbeam, are connected with diagonal brace; If main truss is many row's truss, arranges between truss and crossbeam more and be connected with horizontal shore and vertical supporting frame; On truss, lower edge is provided with reinforcement chord member; It is characterized in that, the pin-and-hole distance of described depth of truss direction is 2400mm ~ 2800mm, and the pin-and-hole distance of length direction is 5800mm ~ 6000mm; The chord member cross section of described pricncipal rafter, lower chord, montant, brace and reinforcement chord member is square tube and rectangular tube; Described crossbeam upper flange soffit has positioner, and positioner has threaded steel plate, and being connected between bridge deck and crossbeam is to pass crossbeam upper flange by hexagon socket head cap screw to be connected realization with the threaded steel plate of positioner.

The utility model has the advantage of: can set up the trussed bridge that single span is 90m across footpath; The upper chord of truss, lower chord, reinforcement chord member adopt quarter bend, and adopt Hi-Stren steel, greatly strengthen the flexural strength of bridge, the pin-and-hole distance of truss length direction is 5800mm ~ 6000mm, the amount of deflection of bridge is reduced greatly, solve existing assembled steel spanning footpath little, the problem that amount of deflection is large.

Accompanying drawing explanation

Fig. 1 is a kind of large span assembling of the utility model highway steel truss bridge trussed construction cell schematics;

Fig. 2 is the utility model single truss of a kind of large span assembling highway steel truss bridge and many row's truss schematic diagrames;

Fig. 3 is the schematic cross-section of the single truss of a kind of large span assembling of the utility model highway steel truss bridge and many row's truss;

Fig. 4 is a kind of large span assembling of the utility model highway steel truss bridge trussed construction schematic diagram;

Fig. 5 is a kind of large span assembling of the utility model highway steel truss bridge trussed construction top view;

Fig. 6 is upper chord, lower chord, the reinforcement chord member schematic cross-section of a kind of large span assembling of the utility model highway steel truss bridge truss;

Fig. 7 is a kind of large span assembling of the utility model highway steel truss bridge beam structure schematic diagram;

Fig. 8 is a kind of large span assembling of the utility model highway steel truss bridge section of beam schematic diagram;

Fig. 9 is a kind of large span assembling highway steel truss bridge crossbeam of the utility model and bridge deck connection diagram.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail:

As shown in Figure 1, 2, 3, a kind of large span assembling highway steel truss bridge, include left truss (1a) and right truss (1b), between left truss (1a) and right truss (1b), be provided with crossbeam (2), on crossbeam (2), be provided with bridge deck (3), between adjacent two crossbeams (2), be provided with wind-resistant pull rod (4) and vertical wind structure (5); Described left truss (1a) and right truss (1b) all can be single truss or arrange truss more, if main truss is single truss, between truss (6) and crossbeam (2), are connected with diagonal brace (7); If main truss is many row's truss, between truss (6) and crossbeam (2), be connected with horizontal shore (8) and vertical supporting frame (9).The upper lower edge of truss (6) is provided with strengthens chord member (10).

As shown in Figure 4,5, 6, the chord member cross section of truss (6) upper chord (11), lower chord (12), montant (13), brace (14) and reinforcement chord member (10) is square tube and rectangular tube, has increased bending resistance; The pin-and-hole distance of truss (6) short transverse is 2400mm ~ 2500mm, is convenient to Container Transport, railway transportation; The pin-and-hole distance of truss length direction is 5800mm ~ 6000mm, reduces deflection of bridge span, simultaneous adaptation different spans.

Upper chord (11), lower chord (12) steel of described truss (6) select yield strength to be not less than the material of 420MPa, montant (13), brace (14) steel select yield strength to be not less than the material of 345MPa, in meeting intensity, save manufacturing cost.

As shown in Fig. 7,8,9, described crossbeam (2) upper flange soffit has positioner (15), positioner has threaded steel plate (16), and being connected between bridge deck (3) and crossbeam (2) is to pass crossbeam (2) upper flange by hexagon socket head cap screw to be connected realization with the threaded steel plate (16) of positioner.

Described truss (6) is divided into standard truss and height is cut truss, and both differences are brace (14) sectional dimension difference, and other parts are identical.Height is cut truss for bridge two ends, in the middle of bridge, is standard truss.

The utility model is mainly used in the accident such as national defense transportation or rescue and relief work at ordinary times, set up the provisional or semipermanent bridge of large span, or for highway, railway, Construction for Hydroelectric Project, or for the emergency first-aid repair of highway bridge, ensure that military heavy equipment and vehicle overcome the obstacles such as rivers and creeks, river valley, gully; Because maximum span reaches 90 meters, in the situation that reducing bridge pier, realize large span and build bridge.

Claims

1. large span assembling highway steel truss bridge, include left truss (1a) and right truss (1b), between left truss (1a) and right truss (1b), be provided with crossbeam (2), on crossbeam (2), be provided with bridge deck (3), between adjacent two crossbeams (2), be provided with wind-resistant pull rod (4) and vertical wind structure (5); Described left truss (1a) and right truss (1b) all can be single truss or arrange truss more, if main truss is single truss, between truss (6) and crossbeam (2), are connected with diagonal brace (7); If main truss is many row's truss, between truss (6) and crossbeam (2), be connected with horizontal shore (8) and vertical supporting frame (9); The upper lower edge of truss (6) is provided with strengthens chord member (10); It is characterized in that in the pin-and-hole distance of described truss (6) short transverse be 2400mm ~ 2800mm, the pin-and-hole distance of length direction is 5800mm ~ 6000mm; The chord member cross section of described truss (6) upper chord (11), lower chord (12), montant (13), brace (14) and reinforcement chord member (10) is square tube and rectangular tube; Described crossbeam (2) upper flange soffit has positioner (15), positioner has threaded steel plate (16), and being connected between bridge deck (3) and crossbeam (2) passes crossbeam (2) upper flange by hexagon socket head cap screw and be connected with the threaded steel plate (16) of positioner.

2. large span assembling highway steel truss bridge according to claim 1, it is characterized in that: the upper chord (11) of described truss (6), lower chord (12) steel select yield strength to be not less than the material of 420MPa, and montant (13), brace (14) steel select yield strength to be not less than the material of 345MPa.