CN217324935U

CN217324935U - Arc steel box girder structure for bridge construction

Info

Publication number: CN217324935U
Application number: CN202220024034.4U
Authority: CN
Inventors: 熊伟峰; 胡斌; 温奇锐; 邵志超
Original assignee: Jiangxi Transportation Consulting Co ltd
Current assignee: Jiangxi Transportation Consulting Co ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2022-08-30
Anticipated expiration: 2032-01-06

Abstract

The utility model discloses an arc steel box girder structure for bridge construction, which belongs to the field of bridges, and the utility model discloses an arc steel box girder structure for bridge construction, which comprises a road plate and a supporting diagonal rod, wherein an arch support frame is arranged at the middle position of the lower side of the road plate along the length direction, and the position of the arch support frame in the middle of the road plate is concave towards the road plate; the both sides of pavement slab downside mid portion are provided with fixed boss, the both sides face at the both ends of arched support frame all is provided with the fixed station, support the both ends of down tube respectively with fixed boss with fixed station fixed connection. The setting up of arch support frame makes whole bearing capacity stronger, and arch support frame mid portion material can reduce by a wide margin for whole weight reduces, supports being provided with of down tube simultaneously and promotes mid portion's support bearing capacity, thereby supports intensity and can also obtain guaranteeing when reducing whole weight.

Description

Arc steel box girder structure for bridge construction

Technical Field

The utility model relates to a bridge field especially relates to an arc steel box girder construction is used in bridge construction.

Background

When the design bridge width broad, the cross-section of conventional prestressed concrete box girder bridge can design into the form of single case multi-chambered, and must lead to structure upper portion load increase along with the increase of case room, and then makes the synchronous increase of engineering volume of lower part pier and pile foundation, arouses a series of problems such as heavy, the concrete construction square volume is big, engineering cost height of pier shape. Aiming at the problems, the structural form of the steel box girder can reduce the upper load of the bridge, reduce the workload of on-site construction of the bridge and shorten the construction period, but for the bridge with strict rigidity requirement, the transverse rigidity of the wider steel box girder is smaller, and the transverse overturning problem is more prominent.

The steel diagonal brace combined PC beam disclosed by Chinese patent document publication No. CN110777633A comprises a prestressed concrete box beam and a steel diagonal brace; the upper ends of the steel inclined supporting rods are fixed to the transverse outer end of the cantilever flange of the prestressed concrete box girder, the lower ends of the steel inclined supporting rods are fixed to the transverse outer end of the prestressed concrete box girder bottom plate, and the steel inclined supporting rods are longitudinally arranged at intervals and are bilaterally symmetrical.

In order to ensure enough strength, the whole weight of the existing steel box girder is still larger, so that a pier still needs a larger diameter, and the construction period is still longer; however, the quality of the steel box girder is reduced, and the steel box girder structure has high strength.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to solve the technical problem that an arc steel box girder structure is used in bridge construction is proposed, with support frame mid portion weight furthest reduction, adopts portable additional strengthening to make the bulk strength obtain guaranteeing simultaneously to make the pier diameter reduce as far as possible, it can be convenient more rapidly to build.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides an arc steel box girder structure for bridge construction, which comprises a road deck and a supporting diagonal rod, wherein an arch support frame is arranged at the middle position of the lower side of the road deck along the length direction, and the position of the arch support frame in the middle of the road deck is sunken towards the road deck; the both sides of pavement board downside mid portion are provided with fixed boss, the both sides face at the both ends of arch support frame all is provided with the fixed station, support the both ends of down tube respectively with fixed boss with fixed station fixed connection.

The utility model has the preferable technical proposal that a plurality of reinforced triangular plates are arranged on two sides of the arched supporting frame, and the reinforced triangular plates are fixedly connected with the side surfaces of the arched supporting frame and the lower side surface of the road deck simultaneously; the reinforced triangular plate is provided with a connecting support, and the other end of the connecting support is fixedly connected with the supporting inclined rod.

The utility model discloses preferred technical scheme lies in, fixed boss is located the pavement slab side with the intermediate position of arched support frame side.

The utility model has the preferable technical proposal that the connecting bracket comprises a connecting sleeve and a side plate connecting column; the utility model discloses a set up the set-square, including curb plate spliced pole, connecting sleeve, bracing strut, connecting sleeve, the curb plate spliced pole middle part be provided with strengthen the joint breach that the set-square matches, the side of curb plate spliced pole is provided with the perpendicular to strengthen the locking bolt of set-square side, connecting sleeve axis direction with it is parallel to support the down tube axis direction, connecting sleeve cup joint in support on the down tube.

The utility model discloses preferred technical scheme lies in, the arched support frame both ends are provided with the pier and connect the platform, the inside hollow structure that is of arched support frame, the position is provided with the enhancement baffle between the arched support frame is inside.

The beneficial effects of the utility model are that:

the utility model provides an arc steel box girder structure for bridge construction, which comprises a road deck and a supporting diagonal rod, wherein an arch support frame is arranged at the middle position of the lower side of the road deck along the length direction, and the position of the arch support frame in the middle of the road deck is sunken towards the road deck; the both sides of pavement slab downside mid portion are provided with fixed boss, the both sides face at the both ends of arched support frame all is provided with the fixed station, support the both ends of down tube respectively with fixed boss with fixed station fixed connection. The setting up of arch support frame makes whole bearing capacity stronger, and arch support frame mid portion material can reduce by a wide margin for whole weight reduces, supports being provided with of down tube simultaneously and promotes mid portion's support bearing capacity, makes mid portion's bearing capacity improve, thereby supports intensity and can also obtain guaranteeing when reducing whole weight, thereby makes the pier requirement lower, accelerates the construction progress.

Drawings

Fig. 1 is a schematic view of the overall structure of an arc-shaped steel box girder structure for bridge construction provided in the specific embodiment of the present invention;

FIG. 2 is a schematic view of portion A of FIG. 1 provided in an embodiment of the present invention;

fig. 3 is a schematic side view of an arc-shaped steel box girder structure for bridge construction according to an embodiment of the present invention;

in the figure:

1. a road surface plate; 2. an arched support frame; 3. supporting the diagonal rods; 4. connecting a bracket; 5. fixing the boss; 6. a fixed table; 7. reinforcing the triangular plate; 21. a reinforcing spacer; 22. a pier connection platform; 41. a connecting sleeve; 42. clamping the notch; 43. a side plate connecting column; 44. and locking the bolt.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the drawings.

As shown in fig. 1-3, the arc-shaped steel box girder structure for bridge construction provided in this embodiment includes a pavement slab 1 and a supporting diagonal rod 3, an arch-shaped support frame 2 is disposed at a middle position of a lower side of the pavement slab 1 along a length direction, and the arch-shaped support frame 2 is recessed toward the pavement slab 1 at a position in the middle of the pavement slab 1; the both sides of 1 downside mid portion of pavement board are provided with fixed boss 5, the both sides face at the both ends of arched support frame 2 all is provided with fixed station 6, support the both ends of down tube 3 respectively with fixed boss 5 with fixed station 6 fixed connection. Two ends of the supporting diagonal rod 3 are provided with connecting threads, and two ends of the supporting diagonal rod are respectively fixed on the fixing table 6 and the fixing boss 5 through nuts. According to the bearing principle of the arch bridge, the arch support frames 2 are arranged so that the arch support frames have enough supporting capacity for the road deck 1, and meanwhile, the concave parts in the middle of the arch support frames 2 can reduce the use of a large amount of steel, so that the whole weight is greatly reduced. And the width of the arched support frame 2 is reduced as much as possible, and meanwhile, reinforcing triangular plates 7 are arranged on two sides of the arched support frame 2 to reinforce the supporting capacity of the edge position of the pavement slab 1. In order to further improve the edge strengthening of the middle position, the fixing boss 5 is positioned at the middle position between the side surface of the road slab 1 and the side surface of the arched support frame 2. The supporting inclined rods 3 are steel rods, the fixing table 6 is located at the position where the arch-shaped supporting frame 2 is connected with the pier, and the middle of the pavement board 1 can be well supported by the supporting inclined rods 3.

In order to further improve the supporting strength of the supporting diagonal rods 3, a plurality of reinforcing triangular plates 7 are arranged on two sides of the arched supporting frame 2, and the reinforcing triangular plates 7 are fixedly connected with the side surfaces of the arched supporting frame 2 and the lower side surface of the road deck 1; the reinforcing triangular plate 7 is provided with a connecting support 4, and the other end of the connecting support 4 is fixedly connected with the supporting inclined rod 3. Support down tube 3 from many rigidity to strengthen the set square 7 on through linking bridge 4 to make support down tube 3 have sufficient intensity and support fixed boss 5, also can be close to the effort that pier position has the enhancement set square 7 of stronger support ability simultaneously and provide the enhancement set square 7 that is close to the intermediate position, thereby make holistic support intensity obtain promoting.

Preferably, the connecting bracket 4 comprises a connecting sleeve 41 and a side plate connecting column 43; curb plate spliced pole 43 middle part be provided with strengthen the joint breach 42 that the set-square 7 matches, the side of curb plate spliced pole 43 is provided with the perpendicular to strengthen the locking bolt 44 of set-square 7 side, connecting sleeve 41 axis direction with it is parallel to support 3 axis directions of down tube, connecting sleeve 41 cup joint in support on the down tube 3. The connecting sleeve 41 is provided with a locking bolt 44 which is fixed on the supporting inclined rod 3, the side plate connecting column 43 passes through the bolt to firmly fix the side plate connecting column with the reinforcing triangular plate 7, and meanwhile, the clamping notch 42 can well limit the side plate connecting column 43 to shake, so that a good limiting effect is achieved.

Preferably, the two ends of the arched support frame 2 are provided with bridge pier connection platforms 22, and the bridge pier connection platforms 22 can be conveniently connected and fixed with bridge piers. The interior of the arched support frame 2 is of a hollow structure, and a reinforcing partition plate 21 is arranged between the interior of the arched support frame 2. The hollow arrangement minimizes weight reduction and the reinforcing partition 21 provides sufficient overall strength.

While the invention has been described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. The utility model provides an arc steel box girder structure for bridge construction which characterized in that:

the road pavement slab comprises a road pavement slab (1) and supporting diagonal rods (3), wherein an arched support frame (2) is arranged in the middle of the lower side of the road pavement slab (1) along the length direction, and the arched support frame (2) is sunken towards the road pavement slab (1) at the position in the middle of the road pavement slab (1);

the both sides of pavement board (1) downside mid portion are provided with fixed boss (5), the both sides face at the both ends of arch support frame (2) all is provided with fixed station (6), support the both ends of down tube (3) respectively with fixed boss (5) with fixed station (6) fixed connection.

2. The arc-shaped steel box girder structure for bridge construction according to claim 1, wherein:

a plurality of reinforcing triangular plates (7) are arranged on two sides of the arched support frame (2), and the reinforcing triangular plates (7) are fixedly connected with the side surface of the arched support frame (2) and the lower side surface of the road slab (1) at the same time;

the reinforcing triangular plate (7) is provided with a connecting support (4), and the other end of the connecting support (4) is fixedly connected with the supporting inclined rod (3).

3. The arc-shaped steel box girder structure for bridge construction according to claim 1 or 2, wherein:

the fixed boss (5) is positioned in the middle of the side surface of the road slab (1) and the side surface of the arched support frame (2).

4. The arc-shaped steel box girder structure for bridge construction according to claim 2, wherein:

the connecting bracket (4) comprises a connecting sleeve (41) and a side plate connecting column (43);

curb plate spliced pole (43) middle part be provided with strengthen joint breach (42) that set square (7) match, the side of curb plate spliced pole (43) is provided with the perpendicular to strengthen locking bolt (44) of set square (7) side, connecting sleeve (41) axis direction with it is parallel to support down tube (3) axis direction, connecting sleeve (41) cup joint in support on down tube (3).

5. The arc-shaped steel box girder structure for bridge construction according to claim 1, wherein:

the bridge structure is characterized in that bridge pier connecting platforms (22) are arranged at two ends of the arched support frames (2), hollow structures are arranged inside the arched support frames (2), and reinforcing partition plates (21) are arranged between the insides of the arched support frames (2).