CN213571512U

CN213571512U - Assembled pier connection structure

Info

Publication number: CN213571512U
Application number: CN202022051646.6U
Authority: CN
Inventors: 曾奔; 徐家慧; 邹广林
Original assignee: Guangzhou Urban Planning Survey and Design Institute
Current assignee: Guangzhou Urban Planning Survey and Design Institute
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-06-29
Anticipated expiration: 2030-09-17

Abstract

The utility model relates to a bridge engineering technical field discloses the utility model provides an assembled pier connection structure, include the pier and locate the supporting seat of pier tip, the pier includes the pier shaft and is fixed in along of pier shaft tip the radial outside outstanding cyclic annular protruding portion of pier shaft, cyclic annular protruding portion with through a plurality of rag crab-bolt fixed connection between the supporting seat, pre-buried bellows in the supporting seat, pre-buried reinforcing bar in the pier shaft, the one end of reinforcing bar is fixed the inside of bellows. Has the advantages that: the construction period is short, the prefabricated components do not need to have overhigh precision requirements, the foundation anchor bolt has good anti-seismic performance, and the prefabricated bridge pier and the supporting seat (a bearing platform or a cover beam) are reliably connected by matching with the connection structure of the grouting corrugated pipe.

Description

Assembled pier connection structure

Technical Field

The utility model relates to a bridge engineering technical field especially relates to an assembled joint construction of pier.

Background

The traditional cast-in-place bridge construction method needs to occupy a large field and space, has a long construction period and has great influence on the surrounding environment and traffic, and the assembly type construction technology provides a method for solving the problems, thereby greatly accelerating the project progress and shortening the construction period. For a prefabricated pier connection structure, a node is often a weak link of structural seismic resistance, and the seismic resistance of the node is an important embodiment of connection reliability and determines the safety of a bridge under the action of strong shock. At present, the research on the connection structure and the anti-seismic performance of the assembly type pier connection structure is still not mature enough, and the connection structure and the anti-seismic performance of the assembly type pier connection structure are still the key points and the difficulties of the research on the assembly type bridge.

At present, researchers and engineering designers at home and abroad put forward various schemes for connection structures at joints of prefabricated assembled piers and bearing platforms according to factors such as bridge type characteristics, construction conditions, engineering environments and the like, and the connection structures can be mainly formed by connection of grouting metal corrugated pipes, connection of grouting sleeves, welding or lapping of reinforcing steel bars and adopting a plurality of connection modes such as wet joint structural connection, socket joint type connection, bonded post-tensioned prestressed ribs and the like. The connection modes generally have the problems of long construction period, long maintenance time, complex process, poor seismic performance and the like. The section of a connecting part of the existing connecting mode of the urban bridge fabricated concrete pier is weakened, the rigidity and the strength are reduced, and the pier stud is seriously damaged under the action of composite loads such as bending and twisting in an earthquake.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the existing connection mode of the prefabricated assembled bridge pier generally has the problems of long construction period, long maintenance time, complex process, poor seismic performance and the like. Thus, an assembled pier connection structure is proposed to improve the above technical problems.

In order to realize the purpose, the utility model discloses a technical scheme be:

the embodiment of the utility model provides an assembled pier connection structure, including the pier and locate the supporting seat of pier tip, the pier includes pier shaft and is fixed in the annular protruding portion of pier shaft tip and radially outwards outstanding along the pier shaft;

the annular protruding portion is fixedly connected with the supporting seat through a plurality of anchor bolts, a corrugated pipe is pre-embedded in the supporting seat, reinforcing steel bars are pre-embedded in the pier body, and one end of each reinforcing steel bar is fixed in the corrugated pipe.

Preferably, the one end of rag crab-bolt is pre-buried in the supporting seat, the rag crab-bolt is pre-buried in one end in the supporting seat is curved.

Preferably, the curved shape is a hook shape.

Preferably, a plurality of parallel reinforcing steel bars are pre-embedded in the pier body, and corrugated pipes corresponding to the plurality of reinforcing steel bars one to one are pre-embedded in the supporting seat.

Preferably, a plurality of anchor bolts are uniformly arranged in a circumferential direction of the ring-shaped protruding portion.

Preferably, the supporting seat is a bearing platform or a cover beam.

Preferably, the number of the support seats is two, and the two support seats are respectively located at two ends of the pier.

Preferably, the pier and the support seat are square.

Preferably, the bellows is a metal bellows.

Preferably, the pier body and the annular protrusion are integrally formed.

Compared with the prior art, the assembly type bridge pier connecting structure has the beneficial effects that:

(1) the pier body is provided with the annular protruding part, so that the area of the connecting surface of the pier body and the supporting seat (which is a bearing platform or a bent cap) is increased, and the anti-seismic performance of the connection of the components is enhanced by the matching of the pier and the foundation anchor bolt. The foundation anchor bolt is matched with the grouting corrugated pipe for connection, and the requirement for high precision of the prefabricated part is not required in the production process. The structure of the anchor bolt enables the anti-seismic performance of the pier to be enhanced, and the connection structure of the upper grouting corrugated pipe is matched, so that the connection between the pier and the bearing platform or the cover beam is more reliable.

(2) Concrete does not need to be poured in situ, and the bridge piers can be quickly spliced, so that the construction period is short.

Drawings

Fig. 1 is an elevation view of an assembled pier connection structure;

fig. 2 is a plan view of an assembled pier connection structure;

in the figure, 1, reinforcing steel bars; 2. a steel plate; 3. anchor bolts; 4. a bellows; 5. a bridge pier; 51. a pier body; 52. an annular protrusion; 6. and (4) supporting the base.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1, an assembled pier connection structure according to an embodiment of the present invention includes a pier 5 and a supporting seat 6 disposed at an end of the pier, where the pier 5 includes a pier body 51 and an annular protrusion 52 fixed at an end of the pier body 51 and protruding radially outward from the pier body, specifically, the supporting seat 6 may be a bearing platform or a capping beam, and when the supporting seat is a bearing platform, the pier body 51 and the annular protrusion 52 integrally form an inverted T-shaped structure, and the supporting seat 6 is a schematic structural diagram of the bearing platform as shown in fig. 1; when the bent cap is used, the pier body 51 and the annular protruding part 52 integrally form a positive T-shaped structure; if the number of the supporting seats 6 is 2, when the supporting seats are respectively a bearing platform and a cover beam, the two ends of the pier body 51 are both provided with the annular protruding parts 52, and the pier body 51 and the annular protruding parts 52 at the two ends form an I-shaped structure as a whole.

Wherein, the supporting seat 6 adopts the connected mode of 3 cooperation grout bellows 4 of rag crab-bolt with pier 5, specifically: annular protruding portion 52 with through a plurality of rag crab-bolts 3 fixed connection between the supporting seat 6, pre-buried bellows 4 in the supporting seat 6, for intensity is improved and life, the preferred corrugated metal pipe of bellows 4, pre-buried reinforcing bar 1 in the pier shaft 51, the inside at bellows 4 is fixed to the one end of reinforcing bar 1, can be through the fixed reinforcing bar 1 of the mode of grout in bellows 4. Therefore, the bridge pier can be quickly spliced, and the area of the connecting surface is increased by the inverted T-shaped structure, so that the seismic performance of member connection is enhanced. This embodiment adopts the connected mode of 3 cooperation grout bellows of rag crab-bolt, need not have too high required precision to prefabricated component in process of production to reduced production technology's complexity, and made anti-seismic performance strengthen, pier 5 with the connection of supporting seat 6 is more reliable.

Preferably, one end of the anchor bolt 3 is embedded in the supporting seat 6, and the other end of the anchor bolt 3 passes through a through hole of the annular protrusion 52 and is fixedly connected to the annular protrusion 52 through the steel plate 2 and a nut. Further, anchor bolt 3 pre-buried in the one end of supporting seat 6 is the bending form to strengthen anchor bolt 3's joint strength, thereby make pier 5 with supporting seat 6 connects reliably in order to guarantee assembled pier connection structure's structure is firm. Preferably, the curved shape is a hook shape of the anchor bolt 3 as shown in fig. 1.

Preferably, the pier body 51 and the annular protrusion 52 are integrally formed for the convenience of processing and the improvement of the structural strength of the pier.

Further, a plurality of parallel arranged steel bars 1 are pre-embedded in the pier body 51, and corrugated pipes 4 corresponding to the plurality of parallel arranged steel bars 1 one to one are pre-embedded in the supporting seat 6, so that the connection firmness between the pier and the bearing platform or the cover beam can be further improved.

Further, a plurality of anchor bolts 3 are uniformly arranged in the circumferential direction of the ring-shaped protruding portion 52, so that the overall force is balanced.

Further, the two support seats 6 are respectively located at two ends of the pier 5, the two support seats 6 are respectively a bearing platform and a cover beam, the bearing platform is located at the lower end of the pier 5, and the cover beam is located at the upper end of the pier 5, so that the whole pier is formed into an I-shaped shape, specifically, the lower end of the pier 5 and the bearing platform are connected in the mode of the foundation anchor bolt 3, the steel bar 1 and the corrugated pipe 4, and the connection mode of the foundation anchor bolt 3, the steel bar 1 and the corrugated pipe 4 is also arranged between the upper end of the pier 5 and the cover beam.

As shown in fig. 2, in a plan view of the fabricated pier connection structure, the anchor bolts 3 are equally disposed in anchor bolt holes provided in the support base 6 corresponding to the ring-shaped protrusion 52, and the number of the anchor bolts is designed and arranged according to the size and shape of the pier 5. The plan view of assembled pier connection structure shows, the supporting seat 6 with the bottom of the type of falling T structure of pier 5 demonstrates for square, certainly, according to the design needs, this plan view that assembled pier connection structure after the prefabricated concatenation corresponds can be circular or other regular figure that accord with the construction demand.

Based on above-mentioned technical scheme, provide a structure construction of assembled pier connection structure, this structure need not be at construction site concreting, therefore construction cycle is short. The fabricated pier connection structure may be manufactured by the following construction method:

1. when in construction, the connection surface of the support seat 6 and the annular protrusion 52 is roughened;

2. positioning the pier 5 to a corresponding position on the support seat 6 through a crane;

3. the anchor bolt 3 which is reserved on the supporting seat 6 originally passes through an anchor bolt hole reserved in the annular protruding part 52 of the pier 5;

4. the steel bars 1 in the pier body 51 are inserted into the corrugated pipes 4 reserved in the supporting seat 6 (when the bearing platform structure is prefabricated, the bearing platform corrugated pipes 4 are grouted firstly, and when the bent cap structure is prefabricated, the bent cap corrugated pipes 4 are grouted later);

5. and after the assembling process is finished, the foundation bolts 3 are tightened. The steps can realize the quick connection of the prefabricated assembled pier, thereby obtaining the assembled pier connection structure.

Through the design of the type of falling T of pier 5, increased the area of connecting the face, the cooperation the connection mode of rag crab-bolt 3 and grout bellows 4 can be so that structural member can exert the wholeness of component when receiving earthquake action effectively to resist the earthquake influence, overcome the not enough of seismic performance when the grout bellows is single to be connected well.

To sum up, the embodiment of the utility model provides an assembled pier connection structure, its structure has beneficial effect than traditional structure: the construction period is short, the connection mode of the foundation anchor bolt matched with the grouting corrugated pipe has no high precision requirement on the prefabricated part, and the anti-seismic performance is good.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. An assembly type bridge pier connecting structure comprises a bridge pier and a supporting seat arranged at the end part of the bridge pier, and is characterized in that the bridge pier comprises a pier body and an annular protruding part which is fixed at the end part of the pier body and protrudes outwards along the radial direction of the pier body;

2. The assembled pier connecting structure according to claim 1, wherein: one end of the anchor bolt is pre-embedded in the supporting seat, and one end of the anchor bolt is pre-embedded in the supporting seat and is bent.

3. The assembled pier connecting structure according to claim 2, wherein: the curved shape is a hook shape.

4. The assembled pier connecting structure according to claim 1, wherein: a plurality of parallel reinforcing steel bars are pre-embedded in the pier body, and corrugated pipes corresponding to the plurality of reinforcing steel bars one to one are pre-embedded in the supporting seat.

5. The assembled pier connecting structure according to claim 1, wherein: the anchor bolts are uniformly arranged on the circumference of the annular protruding part.

6. The assembled pier connecting structure according to claim 1, wherein: the supporting seat is a bearing platform or a cover beam.

7. The assembled pier connecting structure according to claim 1, wherein: the number of the supporting seats is two, and the two supporting seats are respectively located at two ends of the pier.

8. The assembled pier connecting structure according to claim 1, wherein: the bridge pier and the supporting seat are square.

9. The assembled pier connecting structure according to claim 1, wherein: the corrugated pipe is a metal corrugated pipe.

10. The assembled pier connecting structure according to claim 1, wherein: the pier body and the annular protruding part are integrally formed.