CN210507105U

CN210507105U - Lattice type bent cap

Info

Publication number: CN210507105U
Application number: CN201921111623.0U
Authority: CN
Inventors: 李国平; 徐栋; 刘超; 柳惠芬; 李方元; 沈殷; 张国泉
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-05-12
Anticipated expiration: 2029-07-16

Abstract

The utility model relates to a lattice formula bent cap sets up between girder support and pier stud (4), a serial communication port, first bent cap (1) and second bent cap (2) including the interval setting, be connected through crossbeam (3) between first bent cap (1) and the second bent cap (2), first bent cap (1) and second bent cap (2) are segmentation concatenation or full length bent cap, be provided with vertical pore (9) that are used for passing vertical insertion reinforcing bar (6) on first bent cap (1) and the second bent cap (2). Compared with the prior art, the utility model can adopt segment type in the transportation process, which can reduce the transportation difficulty; the bent cap is arranged in a split manner, so that the hoisting difficulty is reduced; the bent cap and the pier stud are temporarily fixed by adopting a steel tenon, so that additional temporary support and a complex connecting process are not needed; the safety of the bridge is improved.

Description

Lattice type bent cap

Technical Field

The utility model relates to a bridge structures especially relates to a lattice bent cap.

Background

The capping beam refers to a cross beam arranged on the top of the bent frame pier for supporting, distributing and transferring the load of the upper structure, and mainly functions to support the upper structure of the bridge and transfer the whole load to the lower structure. The bridge piles are directly connected with the bent cap, and the bridge piles are connected with the bearing platforms or the upright posts and then connected with the bent cap.

The capping beam is mostly cast in place by adopting a bracket in the past. With the advance of industrialized construction in China, the capping beam is prefabricated in the industry, and the construction comprises on-site hoisting construction after the capping beam is integrally prefabricated. However, as traffic demand increases, so does the design width and tonnage of overpasses. The weight of a part of large-sized bent cap reaches hundreds of tons, and the bent cap with large weight and long length causes great difficulty in transportation and hoisting. In addition, in the process of hoisting the large-scale bent cap, a heavy crane is needed, the crane occupies a large area, and the traffic condition around a construction site can be influenced.

At present, the capping beam is prefabricated in a whole-section transverse subsection mode, and few supports or transverse temporary consolidation measures are still needed in the assembling process. And the assembled type sectional prefabricated bent cap is adopted, but the final appearance of the prefabricated bent cap is still a full section, is the same as the traditional type and is only convenient for hoisting construction. In the prior art, the connection mode of the capping beam and the pier stud is a complex connection mode such as a steel bar sleeve, and the construction is complex. And the split prefabricated bent cap is a complete bent cap, so that the problem of long-distance transportation still cannot be solved.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to provide a lattice type bent cap for overcoming the above-mentioned drawbacks of the prior art.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a lattice formula bent cap, sets up between girder support and pier stud, first bent cap and the second bent cap that sets up including the interval, be connected through the crossbeam between first bent cap and the second bent cap, first bent cap and second bent cap are segmentation concatenation or full length bent cap at bent cap length direction.

Further, the first capping beam and the second capping beam are of a prestressed concrete structure or a steel concrete composite structure.

Furthermore, when the first cover beam and the second cover beam are of a prestressed concrete structure, dry joints or glue joints are adopted for segmental splicing;

when the first cover beam and the second cover beam are of steel structures, the segmental splicing adopts welding, bolting or riveting.

Furthermore, when the first cover beam and the second cover beam are of a prestressed concrete structure, reinforcing steel bars penetrating through the joints are arranged inside the cover beams along the length direction of the cover beams during segmental splicing, so that the safety of the structure can be enhanced.

Furthermore, the position of the cross beam corresponds to the position of the upper end main beam support, and the main beam support can be supported. The height of the beam is less than or equal to the height of the cover beam at the corresponding position.

Furthermore, the cross section of the beam is rectangular or I-shaped, and the beam is made of reinforced concrete or ultrahigh-performance concrete or steel.

Further, the cross-sectional shapes of the first cover beam and the second cover beam are rectangular, L-shaped, I-shaped or inverted T-shaped. When the section is L-shaped, concrete is poured between the first cover beam and the second cover beam at the top to meet the requirement of travelling.

Furthermore, the first cover beam and the second cover beam are provided with vertical ducts for passing through the reinforcing steel bars.

Furthermore, one or more steel tenons or concrete shear keys are arranged at the joints of the pier columns and the capping beams, and one or more steel notches or corresponding concrete shear keys matched with the steel tenons or the concrete shear keys are arranged at the bottom ends of the capping beams. Besides, the capping beam and the pier stud can be connected by a grouting sleeve.

Furthermore, the pier stud and the capping beam are connected in a splicing mode through seam glue.

Furthermore, a bearing platform is arranged below the pier column, the connection position of the pier column and the bearing platform is the same as the connection mode of the pier column and the capping beam, one or more steel tenons or concrete shear keys are arranged at the connection position of the bearing platform and the pier column, and one or more steel notches or corresponding concrete shear keys matched with the steel tenons or the concrete shear keys are arranged at the bottom end of the pier column.

Furthermore, the pier stud is prefabricated in sections, and the sections are connected by adopting the method.

Furthermore, vertical ducts for passing through the steel bars are correspondingly arranged on the pier stud and the bearing platform.

The construction method comprises the following specific steps:

(a) hoisting the first capping beam and the second capping beam to the top end of the pier stud, and connecting the first capping beam and the second capping beam through the cross beam;

(b) splicing the bearing platform, the pier stud and the capping beam from bottom to top, inserting a vertically inserted steel bar into the reserved hole channel from the top of the capping beam, penetrating the joint, extending into the bearing platform all the time, and connecting the capping beam, the pier stud and the bearing platform in series;

(c) grouting upwards from the bottom of the pore canal until grouting is performed on the top of the bent cap, so that the vertical inserted steel bars are fixed in the bent cap, the pier stud and the bearing platform, and the stress requirement of the joint is met.

Furthermore, U-shaped reinforcing steel bars are arranged at the joints of the first cover beam, the second cover beam and the cross beam in a staggered mode, and ultrahigh-performance concrete is poured outside the U-shaped reinforcing steel bars to form the cross beam.

Furthermore, when both the pier stud and the bearing platform are constructed in a cast-in-place mode, the construction method is only used for connecting the capping beam and the pier stud.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the lattice type bent cap of the utility model can adopt sectional type in the transportation process, thereby reducing the transportation difficulty;

2. the lattice type bent cap is arranged in a slicing way, the weight of a single piece after slicing is greatly reduced, and the hoisting difficulty is reduced;

3. the L-shaped section form in the utility model can reduce the height of the structural building;

4. the lattice type bent cap and the pier stud of the utility model are temporarily fixed by adopting the steel tenon, and no temporary support and complex connecting process are needed;

5. the utility model discloses an in-process that lattice bent cap is being connected with the pier stud or even cushion cap adopts the reinforcing bar to be connected girder steel and pier stud, establishes ties the three even, has increased joint strength, has improved the security of bridge.

Drawings

Fig. 1 is a schematic structural view of the lattice type bent cap of the present invention;

fig. 2 is a sectional view of the lattice type bent cap of the present invention;

fig. 3 is an exploded view of the lattice type bent cap of the present invention;

fig. 4 is a schematic structural view of the lattice type bent cap of the present invention with an L-shaped cross section;

fig. 5 is a schematic view of the i-shaped cross section of the lattice type bent cap of the present invention;

fig. 6 is a schematic view of an inverted T-shaped cross section of the lattice type bent cap of the present invention;

fig. 7 is a schematic perspective view of the connection between the lattice type bent cap and the pier stud of the present invention;

fig. 8 is a schematic sectional view of the connection between the lattice type bent cap and the pier stud of the present invention;

fig. 9 is a schematic view of the connection of the lattice type bent cap, the pier stud and the bearing platform of the present invention.

1. The steel structure comprises a first cover beam, 2, a second cover beam, 3, a cross beam, 4, a pier stud, 5, a bearing platform, 6, vertical inserted steel bars, 7, steel tenons, 8, steel notches, 9 and pore channels.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Examples

A lattice type bent cap is arranged between a main beam support and a pier stud 4, and comprises a first bent cap 1 and a second bent cap 2 which are arranged at intervals, wherein the first bent cap 1 and the second bent cap 2 are connected through a cross beam 3, and the first bent cap 1 and the second bent cap 2 are spliced in sections (shown in figure 2) or are full-length bent caps in the length direction of the bent caps. The first capping beam 1 and the second capping beam 2 are of a prestressed concrete structure or a steel structure or a reinforced concrete composite structure. When the first bent cap 1 and the second bent cap 2 are of prestressed concrete structures, dry joints or glue joints are adopted for segmental splicing, and joint bars are arranged between the joints or no joint bars are arranged; when the first cover beam 1 and the second cover beam 2 are steel structures, welding, bolting or riveting is adopted for segmental splicing. The position of the cross beam 3 corresponds to the position of the main beam support at the upper end, and the main beam support can be supported. The height of the cross beam 3 is less than or equal to the height of the cover beam at the corresponding position.

The cross section of the beam 3 is rectangular or I-shaped, and the material of the beam 3 is reinforced concrete or ultrahigh-performance reinforced concrete or steel. The cross-sectional shapes of the first and second

bent caps

1 and 2 are rectangular, L-shaped, I-shaped (fig. 5) or inverted T-shaped (fig. 6). As shown in fig. 4, when the section is L-shaped, concrete is poured on the top between the first and second

bent caps

1 and 2 to meet the driving requirements. The first bent cap 1 and the second bent cap 2 are provided with vertical ducts 9 for vertically inserting the reinforcing steel bars 6. As shown in fig. 7-8, one or more steel tenons 7 or concrete shear keys are arranged at the joints of the pier stud 4 and the capping beam, and one or more steel notches 8 matched with the steel tenons 7 or matched concrete shear keys are arranged at the bottom end of the capping beam. A bearing platform 5 is arranged below the pier column 4, and the connection position of the pier column 4 and the bearing platform 5 is the same as the connection mode of the pier column 4 and the cover beam. The pier stud 4 and the bearing platform 5 are correspondingly provided with vertical pore channels 9 for vertically inserting the reinforcing steel bars 6.

As shown in fig. 9, the bearing platform 5, the pier stud 4 and the capping beam are spliced from bottom to top, the vertically inserted reinforcing steel bar 6 is inserted into the reserved hole 9 from the top of the capping beam and penetrates through the joint, the vertically inserted reinforcing steel bar extends into the bearing platform 5 all the way, the capping beam, the pier stud 4 and the bearing platform 5 are connected in series, grouting is carried out upwards from the bottom of the hole 9 until grouting is carried out from the top of the capping beam, and therefore the vertically inserted reinforcing steel bar 6 is fixed in the capping beam, the pier stud 4 and the bearing platform 5, and the stress requirement of the joint is met. When both the pier stud 4 and the bearing platform 5 are constructed in a cast-in-place mode, the connecting mode is only used for connecting the capping beam and the pier stud 4.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. The utility model provides a lattice formula bent cap, sets up between girder support and pier stud (4), its characterized in that, first bent cap (1) and second bent cap (2) including the interval setting, be connected through crossbeam (3) between first bent cap (1) and the second bent cap (2), first bent cap (1) and second bent cap (2) are segmentation concatenation or full length bent cap in bent cap length direction.

2. A lattice-type capping beam as claimed in claim 1, characterized in that the first capping beam (1) and the second capping beam (2) are of prestressed concrete construction or steel concrete composite construction.

3. A lattice type capping beam as claimed in claim 2, wherein when the first capping beam (1) and the second capping beam (2) are of prestressed concrete structure, the segmental jointing is performed by dry joint or glue joint;

when the first cover beam (1) and the second cover beam (2) are of steel structures, the segmental splicing adopts welding, bolting or riveting.

4. A lattice type capping beam as claimed in claim 3, wherein, when the first capping beam (1) and the second capping beam (2) are of prestressed concrete structure, the inside of the capping beam is provided with reinforcing bars crossing the joints along the length direction of the capping beam when the capping beams are spliced in sections.

5. A lattice-type capping beam as claimed in claim 1, characterised in that the cross beams (3) are located in correspondence with the location of the upper main beam support.

6. A lattice-type capping beam as claimed in claim 1, characterised in that the cross-sectional shape of the first capping beam (1) and the second capping beam (2) is rectangular, L-shaped, i-shaped or inverted T-shaped.

7. A lattice cover beam according to claim 6, characterised in that when the cross-sectional shape is L-shaped, concrete is poured on top between the first (1) and second (2) cover beams.

8. A lattice-type capping beam as claimed in claim 1, characterised in that the first capping beam (1) and the second capping beam (2) are provided with vertical apertures (9) for the insertion of vertical reinforcing bars (6).

9. A lattice type bent cap according to claim 1, characterized in that the pier stud (4) and the bent cap are spliced by joint glue, a concrete shear key or one or more steel tenons (7) are arranged at the joint of the pier stud and the bent cap, and one or more steel notches (8) matched with the concrete shear key or the steel tenons (7) are arranged at the bottom end of the bent cap.