CN104594176A

CN104594176A - Long-span assembly type road steel truss bridge

Info

Publication number: CN104594176A
Application number: CN201310530536.XA
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: 2015-05-06

Abstract

The invention discloses a long-span assembly type road steel truss bridge which can be erected across the 90m span. The long-span assembly type road steel truss bridge comprises a left truss and a right truss. Beams are arranged between the left truss and the right truss. Wind resistance pull rods and a vertical wind structure are arranged between every two adjacent beams. A bridge face board is arranged on the beams. Reinforcing chord members are arranged on upper chords and lower chords of the trusses. The long-span assembly type road steel truss bridge is characterized in that the distance between pin holes in the height direction of each truss ranges from 2400 mm to 2800 mm, and the distance between pin holes in the length direction of each truss ranges from 5800 mm to 6000 mm; the chord member sections of upper chord members, lower chord members, vertical rods, inclined rods and the reinforcing chord members of the trusses are square pipes or rectangular pipes, and the problems that an existing assembly type steel bridge is small in span and large in deflection are solved.

Description

A kind of large span assembling highway steel truss bridge

Technical field

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

Background technology

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

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

Summary of the invention

The present invention, for solving the problem, proposes a kind of single span span length and reaches 90 meters, and structure simple, set up large span assembling highway steel truss bridge fast.

The present invention is achieved by the 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, be provided with wind-resistant pull rod and vertical wind structure, on crossbeam, be provided with bridge deck between adjacent two crossbeams; Described left truss and right truss all can be single truss or arrange truss more, if main truss is single truss, are connected between truss with crossbeam with diagonal brace; If main truss for arrange truss more, many row's truss are connected with horizontal shore and vertical supporting frame with between crossbeam; On truss, lower edge is provided with reinforcement chord member; It is characterized in that, the pin-and-hole distance in 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 the connection between bridge deck and crossbeam to be connected with the threaded steel plate of positioner through crossbeam upper flange by hexagon socket head cap screw to realize.

The invention has the advantages that: can set up single span across footpath is the trussed bridge of 90m; 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 present invention highway steel truss bridge trussed construction cell schematics;

Fig. 2 is the present invention's 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 of the present invention assembling highway steel truss bridge and many row's truss;

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

Fig. 5 is a kind of large span assembling of the present invention 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 present invention highway steel truss bridge truss;

Fig. 7 is a kind of large span assembling of the present invention highway steel truss bridge joint schematic diagram;

Fig. 8 is a kind of large span assembling of the present invention highway steel truss bridge beam structure schematic diagram;

Fig. 9 is a kind of large span assembling of the present invention highway steel truss bridge section of beam schematic diagram;

Figure 10 is a kind of large span assembling highway steel truss bridge crossbeam of the present invention and bridge deck connection diagram.

Detailed description of the invention

Below in conjunction with accompanying drawing, the invention will be further described:

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), crossbeam (2) is provided with between left truss (1a) and right truss (1b), 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, are connected between truss (6) with crossbeam (2) with diagonal brace (7); If main truss for arrange truss more, be connected with horizontal shore (8) and vertical supporting frame (9) between truss (6) with crossbeam (2).The upper lower edge of truss (6) is provided with strengthens chord member (10).

As shown in Fig. 4,6, truss (6) upper chord (11), lower chord (12), montant (13), brace (14) and strengthen chord member (10) chord member cross section be square tube and rectangular tube, add 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, while 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 the connection between bridge deck (3) and crossbeam (2) to be connected with the threaded steel plate (16) of positioner through crossbeam (2) upper flange by hexagon socket head cap screw to realize.

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

The present invention is mainly used in the accident such as national defense transportation or rescue and relief work at ordinary times, provisional or the semipermanent bridge of erection large span, or in 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, realize large span when reducing bridge pier and build bridge.

Claims

1. large span assembling highway steel truss bridge, include left truss (1a) and right truss (1b), crossbeam (2) is provided with between left truss (1a) and right truss (1b), 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, are connected between truss (6) with crossbeam (2) with diagonal brace (7); If main truss for arrange truss more, be connected with horizontal shore (8) and vertical supporting frame (9) between truss (6) with crossbeam (2); 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; Described truss (6) upper chord (11), lower chord (12), montant (13), brace (14) and strengthen chord member (10) chord member cross section be square tube and rectangular tube; Described crossbeam (2) upper flange soffit has positioner (15), positioner has threaded steel plate (16), and the connection between bridge deck (3) and crossbeam (2) is connected with the threaded steel plate (16) of positioner through crossbeam (2) upper flange by hexagon socket head cap screw.

2. large span assembling highway steel truss bridge according to claim 1, it is characterized in that: upper chord (11), lower chord (12) steel of described truss (6) 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.