CN202347428U

CN202347428U - Fabricated highway steel bridge

Info

Publication number: CN202347428U
Application number: CN2011205221360U
Authority: CN
Inventors: 李斐然; 王智勇; 曾勇; 郭金山
Original assignee: Henan Communications Planning Surver & Designing Institute Co Ltd
Current assignee: Henan Communications Planning Surver & Designing Institute Co Ltd
Priority date: 2011-12-14
Filing date: 2011-12-14
Publication date: 2012-07-25
Anticipated expiration: 2021-12-14

Abstract

The utility model discloses a fabricated highway steel bridge which comprises steel trusses and a large crossgirder, wherein the large crossgirder is erected between the steel trusses, each steel truss comprises an upper chord member, a lower chord member and vertical members, the vertical members are supported between the upper chord member and the lower chord member, a rhombic support frame consisting of four diagonal members respectively fixed at the centers of the upper and lower chord members and the vertical members is arranged in a rectangular frame consisting of two adjacent vertical members, the upper chord member and the lower chord member, the lower chord member at the bottom of the rhombic support frame is provided with a clamping component, the clamping component clamps two adjacent diagonal members therein by fastening bolts, a supporting plane is formed between the two diagonal members, and the large crossgirder is horizontally placed on the supporting plane; and two U-shaped bolts (respectively provided with a downward opening) arranged along the two sides of the lower chord member connect the large crossgirder, the clamping component and the lower chord member to be a whole, and the bottom of the lower chord member is provided with a connecting component for connecting the two U-shaped bolts to be whole. The fabricated highway steel bridge disclosed by the utility model has an advantage that: by using the existing steel trusses with the structure above, the width of a bridge floor of the fabricated highway steel bridge is increased through an ingenious fixed mode.

Description

Assembly type steel bridge on highway

Technical field

The utility model relates to assembly type steel bridge on highway, especially relates to the big assembly type steel bridge on highway of a kind of crossbeam bearing capacity.

Background technology

Assembly type steel bridge on highway is a kind of common provisional bridge facility, and it does not receive the restriction of bridge type, and the parallel construction of standardized purlin sheet ability multiple spot has characteristics in light weight, that bearing capacity is big, speed of application is fast.The crossbeam of tradition assembly type steel bridge on highway is to be erected between the montant and brace of both sides truss, through alignment pin crossbeam and truss is linked together.Because the height of supporting traverse receives the limitation of installing space; Cause that the crossbeam installation difficulty is big, design bearing capacity is little; The permission bridge floor clear span of steel bridge is merely 3.7 meters under the normal condition; The narrow bus capacity that causes of bridge deck width is not enough, and the large-scale haulage vehicle of emergency relief vehicle or special equipment can't smooth and easyly pass through when running into disaster or run into other emergency case.

China's utility model patent (patent No.: 201120030406.6) disclose a kind of " truss of mountable steel bridge "; Solved the little problem of traditional assembly type steel bridge on highway crossbeam installing space; But in real world applications, exist following not enough: 1, must make steel truss again; The steel truss of original traditional structure can not directly use, and has increased making and use cost; 2, be connected fastening devices between crossbeam and the crossbeam that does not have corresponding and its coupling and the steel truss, need during use to design separately; 3, the scope of application is narrow, does not have versatility.

Summary of the invention

The purpose of the utility model be to provide a kind of easy for installation, bearing capacity is high, the assembly type steel bridge on highway of highly versatile.

For realizing above-mentioned purpose, the utility model can be taked following technical proposals:

The described assembly type steel bridge on highway of the utility model; Comprise steel truss and be erected at the cross bearer between the steel truss; Said steel truss comprises upper chord, lower chord and is supported on the montant between upper chord and the lower chord at interval; The rhombus bracing frame that constitutes by four braces that are separately fixed at upper and lower chord member and montant center in the rectangular frame that adjacent two montants and upper chord, lower chord are formed; The lower chord that is positioned at rhombus bracing frame bottom is provided with holder, and said holder wherein and between two braces forms supporting plane through fastening bolt with two adjacent brace clampings, and said cross bearer lies in a horizontal plane on this supporting plane; Two U bolts that Open Side Down that are provided with along the lower chord both sides are connected as a single entity cross bearer, holder and lower chord, are provided with the connector that two U bolts are connected as a single entity in said lower chord bottom.

Said holder is the opposing a pair of channel-section steel of opening; Said connector is a pair of clamping plate that are held on two U bolt homonymy bolt pin places.

Said cross bearer is whole shaped steel, combination steel member or trussed construction.

The advantage of the utility model is to utilize the steel truss of existing structure, on the lower chord of rhombus bracing frame bottom, sets up holder and to cross bearer placement platform is provided, and has both satisfied the bigger installing space of cross bearer, has reduced again and has set up cost; Through connecting fixed form cleverly the steel truss at cross bearer and two ends is connected as a single entity simultaneously; Satisfied the bearing capacity of cross bearer of bearing capacity and the various structures of steel truss; Increased the width of assembly type steel bridge on highway bridge floor, made bus capacity be able to significantly improve.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is that the A of Fig. 1 is to view.

Fig. 3 is that the B of Fig. 1 is to view.

The specific embodiment

Like Fig. 1,2, shown in 3; The described assembly type steel bridge on highway of the utility model; Comprise steel truss and be erected at the cross bearer 1 between the steel truss; Steel truss comprises upper chord 2, lower chord 3 and is supported on the montant 4 between upper chord 2 and the lower chord 3 at interval; The rhombus bracing frame that constitutes by four braces 5 that are separately fixed at upper and lower chord member and montant center in the rectangular frame of adjacent two montants 4 and upper chord 2, lower chord 3 compositions; The lower chord 3 that is positioned at rhombus bracing frame bottom is provided with the opposing a pair of channel-section steel 7 of opening, a pair of channel-section steel 7 through fastening bolt will two adjacent brace 5 clampings wherein and between two braces 5 supporting plane of formation, cross bearer 1 lies in a horizontal plane on this supporting plane; Two U bolts that Open Side Down 6 that are provided with along lower chord 3 both sides are connected as a single entity cross bearer 1, channel-section steel 7 and lower chord 3; Be provided with the connector that two U bolts 6 are connected as a single entity in lower chord 3 bottoms, this connector is for being held on the clamping plate 8 at two U bolts, 6 homonymy bolt pin places respectively.Cross bearer 1 can be the monolithic devices steel; Be convenient carrying and install, the combination steel member that cross bearer 1 can also be formed by connecting for multistage or adopt trussed construction.

Cross bearer 1 is born the bridge floor clear span and is increased the load effect that causes; The displacement of U bolt 6 restriction cross bearers 1; When receiving the bridge floor transverse load, cross bearer does the time spent; U bolt 6 left and right sides screw rod internal force generation respective change, the suitable bridge that can stop cross bearer 1 avoids cross bearer 1 to topple to horizontal movement and rotation; U bolt 6 applies certain pretightning force through the clamping plate 8 of lower chord 3 bottoms; For enough pressure is provided between cross bearer and the steel truss; The frictional force that this pressure effect produces has limited the direction across bridge horizontal movement and the rotation of cross bearer 1, avoids cross bearer 1 that sidesway takes place.

Each position of the assembly type steel bridge on highway of the utility model is bolt and connects; Be easy for installation and removal; Harmless steel truss, the maximum bridge floor clear span of pontic that is formed by a plurality of unit combination can reach more than 9 meters, and bridge floor allows parallel four row's vehicles; Be 2.4 times of traditional assembly type steel bridge on highway bridge floor clear span, bus capacity is significantly improved.

Claims

1. assembly type steel bridge on highway; Comprise steel truss and be erected at the cross bearer (1) between the steel truss; Said steel truss comprises upper chord (2), lower chord (3) and is supported on the montant (4) between upper chord (2) and the lower chord (3) at interval; The rhombus bracing frame that constitutes by four braces (5) that are separately fixed at upper and lower chord member and montant center in the rectangular frame that adjacent two montants (4) and upper chord (2), lower chord (3) are formed; It is characterized in that: the lower chord (3) that is positioned at rhombus bracing frame bottom is provided with holder; Said holder wherein and between two braces (5) forms supporting plane through fastening bolt with adjacent two braces (5) clamping, and said cross bearer (1) lies in a horizontal plane on this supporting plane; Two U bolts that Open Side Down (6) that are provided with along lower chord (3) both sides are connected as a single entity cross bearer (1), holder and lower chord (3), are provided with the connector that two U bolts (6) are connected as a single entity in said lower chord (3) bottom.

2. assembly type steel bridge on highway according to claim 1 is characterized in that: said holder is the opposing a pair of channel-section steel (7) of opening; Said connector is for being held on the clamping plate (8) at two U bolts (6) homonymy bolt pin place respectively.

3. assembly type steel bridge on highway according to claim 1 and 2 is characterized in that: said cross bearer (1) is whole shaped steel, combination steel member or trussed construction.