CN216238098U

CN216238098U - Adopt prefabricated pier of socket joint formula

Info

Publication number: CN216238098U
Application number: CN202122709787.7U
Authority: CN
Inventors: 叶嘉彬; 陈庆军; 蔡健; 何岸; 郑敦聪
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-04-08
Anticipated expiration: 2031-11-08

Abstract

The utility model discloses a socket type prefabricated pier which comprises a support pillar and a bearing platform, wherein an adapter of the support pillar is inserted into an adapter groove of the bearing platform, a first shear-resistant stud is arranged on the outer wall of the adapter, a second shear-resistant stud is arranged on the inner wall of the adapter groove, the first shear-resistant stud and the second shear-resistant stud are distributed in a staggered mode, concrete is filled in the adapter groove, an upper longitudinal rib is arranged on the support pillar, a lower longitudinal rib is arranged on the bearing platform, the upper longitudinal rib is fixedly connected with the lower longitudinal rib through a sleeve, the first shear-resistant stud and the second shear-resistant stud are distributed in a staggered mode, the shear resistance and the anti-seismic capacity of the support pillar are improved, the equal stress performance of a cast-in-place structure is met, the support pillar and the bearing platform are beneficial to separate construction, and the construction and installation progress is accelerated.

Description

Adopt prefabricated pier of socket joint formula

Technical Field

The utility model relates to the technical field of bridge structures and construction, in particular to a socket type prefabricated pier.

Background

With the continuous development of society, the formation of green infrastructure networks for interconnection and intercommunication among countries along the line is continuously promoted. At the present stage, the assembly type bridge system is being widely popularized. According to the earthquake-resistant performance, the prefabricated pier system is generally divided into two types of equal cast-in-place and unequal cast-in-place, and the former mainly depends on four connection modes of sleeve grouting connection, corrugated pipe grouting connection, reserved slotted hole grouting connection, socket joint type connection and the like.

And the socket joint type connection is that a preformed hole is arranged in the bottom bearing platform, the prefabricated pier provided with the shear-resistant key groove is inserted into the preformed hole of the bearing platform, and mortar or concrete is injected into the bottom and the periphery of the prefabricated pier to realize the integral connection between the prefabricated pier and the capping beam or the bearing platform. Compared with other connection forms, the method has the advantages that the process is simple, the precision requirements on production and construction stages are not high, and the defects that a post-cast connection part is not provided with a steel reinforcement cage generally, so that the pier is subjected to a horizontal effect, for example, the bridge pier is mainly subjected to the shearing force at the key groove and the strength of concrete around to resist the prying force caused by earthquake load. The prior research results show that the hysteresis performance of the composite material under the action of earthquake is biased to pinch and shrink form, and the equivalent cast-in-place earthquake-resistant performance is difficult to achieve.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems in the prior art, the utility model aims to provide a socket type prefabricated pier. The stress performance equivalent to that of a cast-in-place structure is realized, and the shearing resistance of the pier is improved.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an adopt prefabricated pier of socket joint formula, includes support column and cushion cap, the adapter of support column inserts the linking inslot of cushion cap, the outer wall of adapter is equipped with first shear bolt nail, the inner wall in linking groove is equipped with the second and resists shear bolt nail, first shear bolt nail and the crisscross distribution of second shear bolt nail, fill the concrete in the linking groove.

Preferably, the support column is provided with an upper longitudinal rib, the bearing platform is provided with a lower longitudinal rib, and the upper longitudinal rib is fixedly connected with the lower longitudinal rib through a sleeve.

Preferably, the first shear-resistant pin and the second shear-resistant pin are identical in structure, the first shear-resistant pin comprises a pin rod and a cap, one end of the pin rod is connected with the adapter, and the other end of the pin rod is connected with the cap.

Preferably, the first shear pin is perpendicular to an outer wall of the adaptor head, and the second shear pin is perpendicular to an inner wall of the adaptor slot.

Preferably, the support column further comprises a grouting channel and a grouting inlet, one end of the grouting channel is communicated with the connecting groove, and the other end of the grouting channel is communicated with the grouting inlet.

Preferably, the support column further comprises an annular hoop, and the annular hoop is sleeved on the outer walls of the upper longitudinal rib and the lower longitudinal rib.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. the utility model adopts a socket-type prefabricated pier, an adapter of the prefabricated pier is inserted into an adapter groove of a bearing platform, a first anti-shear stud is arranged on the outer wall of the adapter, a second anti-shear stud is arranged on the inner wall of the adapter groove, the first anti-shear stud and the second anti-shear stud are distributed in a staggered mode, concrete is filled in the adapter groove, and the first anti-shear stud and the second anti-shear stud are distributed in a staggered mode, so that the anti-shear and anti-seismic capabilities of the pier are improved, the stress performance equivalent to a cast-in-place structure is met, the construction of a support column and the bearing platform is facilitated respectively, and the construction and installation progress is accelerated.

2. The socket-type prefabricated bridge pier is adopted, the support column of the prefabricated bridge pier is provided with the upper longitudinal rib, the bearing platform is provided with the lower longitudinal rib, the upper longitudinal rib is fixedly connected with the lower longitudinal rib through the sleeve, the sleeve is adopted to ensure that the upper longitudinal rib and the lower longitudinal rib are firmly connected, the sleeve connection generally adopts extrusion to enable the reinforcing steel bars to generate plastic deformation, so that the firmness of the reinforcing steel bar connection is improved, and meanwhile, the sleeve extrusion is adopted to facilitate an operator to detect the reliability of the connection of the upper longitudinal rib and the lower longitudinal rib.

Drawings

Fig. 1 is a schematic view of a prefabricated pier adopting a socket type according to the present invention.

Fig. 2 is a partially enlarged view of a prefabricated pier using a socket type according to the present invention.

Fig. 3 is a plan view of a cap for a prefabricated pier using a socket type according to the present invention.

Fig. 4 is a flow chart of a construction method using a socket type according to the present invention.

The structure comprises a supporting column 1, an engagement head 11, an annular hoop reinforcement 12, an upper longitudinal reinforcement 13, a first shear resistant stud 14, a grouting inlet 15, a grouting channel 16, a bearing platform 2, an engagement groove 21, a lower longitudinal reinforcement 22, a second shear resistant stud 23 and a sleeve 3.

Detailed Description

The following describes the object of the present invention in further detail with reference to the drawings and specific examples, which are not repeated herein, but the embodiments of the present invention are not limited to the following examples.

As shown in fig. 1 to 4, a prefabricated bridge pier adopting a socket type includes a support pillar 1 and a bearing platform 2, an adapter 11 of the support pillar 1 is inserted into an adapter groove 21 of the bearing platform 2, a first shear bolt 14 is arranged on an outer wall of the adapter 11, a second shear bolt 23 is arranged on an inner wall of the adapter groove 21, the first shear bolt 14 and the second shear bolt 23 are distributed in a staggered manner, the number of the first shear bolt 14 and the second shear bolt 23 is set according to the size of the adapter 11, the adapter groove 21 is filled with concrete, the first shear bolt 14 and the second shear bolt 23 are anchored with solidified concrete, the support pillar 1 and the bearing platform 2 can be constructed respectively, so that a plurality of sets of the support pillar 1 and the bearing platform 2 can be constructed and installed simultaneously, the construction efficiency is improved, the first shear bolt 14 and the second shear bolt 23 increase the shear resistance and the shock resistance of the prefabricated bridge pier, the stress performance equal to that of a cast-in-place structure is met, and the construction of the support column 1 and the bearing platform 2 is facilitated respectively, so that the construction and installation progress is accelerated.

Support column 1 is equipped with vertical muscle 13, cushion cap 2 is equipped with down vertical muscle 22, go up vertical muscle 13 through sleeve 3 and lower vertical muscle 22 fixed connection, adopt sleeve 3 to guarantee to go up vertical muscle 13 and lower vertical muscle 22 firm in connection, sleeve 3 connects and all adopts the extrusion mode generally, make the reinforcing bar produce plastic deformation, thereby increase the fastness of steel bar connection, further increase the structural integrity of support column 1 and cushion cap 2, thereby increase the shear resistance of support column 1 and cushion cap 2, adopt sleeve 3 extrusion simultaneously can make things convenient for the operation personnel to detect the reliable degree of being connected of vertical muscle 13 and lower vertical muscle 22, adopt sleeve 3 to connect the raw and other materials that save the reinforcing bar than the overlap joint mode, and the cost is saved.

The first shear plug pins 14 and the second shear plug pins 23 are structurally identical, the first shear plug pins 14 comprise a pin rod and a cap, one end of the pin rod is connected with the joint 11, the other end of the pin rod is connected with the cap, and the cap can enhance the anchoring capability of the first shear plug pins 14 and the second shear plug pins 23 and the concrete, so that the structural integrity of the first shear plug pins 14 and the second shear plug pins 23 through the concrete is better.

First shear resistant peg 14 is perpendicular with the outer wall of adapter 11, second shear resistant peg 23 is perpendicular with the inner wall of linking groove 21, adopts the perpendicular mode to make first shear resistant peg 14 and the better distribution of staggering of second shear resistant peg 23 to avoid adapter 11 and the unable installation of linking groove 21, also make the installation of adapter 11 and linking groove 21 more convenient simultaneously, reduce the construction degree of difficulty.

The supporting column 1 further comprises a grouting channel 16 and a grouting inlet 15, one end of the grouting channel 16 is communicated with the connection groove 21, the other end of the grouting channel 16 is communicated with the grouting inlet 15, the grouting inlet 15 is formed in the upper end of the supporting column 1, so that concrete can conveniently flow into the connection groove 21 through the grouting channel 16, the connection head 11 and the connection groove 21 are integrated after construction, no gap exists, and the shearing resistance of a shearing resisting part is improved.

The support column 1 further comprises an annular hoop reinforcement 12, the annular hoop reinforcement 12 is sleeved on the outer walls of the upper longitudinal reinforcement 13 and the lower longitudinal reinforcement 22, the annular hoop reinforcement 12 increases the structural integrity of the upper longitudinal reinforcement 13 and the lower longitudinal reinforcement 22, the shear strength of the oblique section of the support column 1 is increased, and the upper longitudinal reinforcement 13 or the lower longitudinal reinforcement 22 and the compression zone concrete are connected in parallel to enable the support column to work together.

A construction method of a socket-and-spigot prefabricated bridge pier comprises the following steps:

s1, reserving a connecting groove 21 in the center of the bearing platform 2, and embedding a second shear resistant stud 23 in the inner wall of the connecting groove 21;

s2, sleeving a plurality of groups of annular stirrups 12 on lower longitudinal ribs 22 in advance, inserting sleeves 3 into the upper ends of the lower longitudinal ribs 22, hoisting the prefabricated support columns 1 into the joining grooves 21, and arranging the first shear resistant studs 14 and the second shear resistant studs 23 of the support columns 1 in a staggered mode;

s3, aligning the upper longitudinal rib 13 and the lower longitudinal rib 22, extruding the sleeve 3 by adopting an extruding device to fixedly connect the upper longitudinal rib 13 and the lower longitudinal rib 22, after the connection of the upper longitudinal rib 13 and the lower longitudinal rib 22 is completed, observing whether the steel bars are compressed, if not, extruding again, and binding the upper longitudinal rib 13 and the lower longitudinal rib 22 by adopting the annular stirrup 12;

s4, building a template sealing joint 11 on the outer side of the annular stirrup 12, pouring concrete into the grouting inlet 15, arranging an attached concrete vibrator on the outer side of the template for vibrating, removing the template after the concrete is completely solidified, and then curing 14d to finish construction.

The construction method adopts the prefabricated installation, avoids a large amount of steel bar binding and formwork erection operation, improves the construction efficiency, does not need temporary support after hoisting, and has lower precision requirements on the production and site construction of prefabricated parts, thereby being easier to construct and reducing the investment of site operators.

Between S3 and S4, adopt high pressure positive blower to clear up the rubble residue in linking up the groove 21, avoid adulterating rubbish in the concreting to influence the compressive strength after the concrete sets.

The above-mentioned embodiments are preferred embodiments of the present invention, and the present invention is not limited thereto, and any other modifications or equivalent substitutions that do not depart from the technical spirit of the present invention are included in the scope of the present invention.

Claims

1. The utility model provides an adopt prefabricated pier of socket joint formula, its characterized in that includes support column and cushion cap, the adapter of support column inserts the linking inslot of cushion cap, the outer wall of adapter is equipped with first shear bolt nail, the inner wall that links up the groove is equipped with the second and resists shear bolt nail, first shear bolt nail and the crisscross distribution of second shear bolt nail, fill the concrete in linking the groove.

2. The prefabricated pier adopting the socket joint mode as claimed in claim 1, wherein the supporting column is provided with an upper longitudinal rib, the bearing platform is provided with a lower longitudinal rib, and the upper longitudinal rib is fixedly connected with the lower longitudinal rib through a sleeve.

3. The socket type precast pier according to claim 1, wherein the first shear pin is structurally identical to the second shear pin, and the first shear pin comprises a pin rod and a cap, one end of the pin rod is connected to the adaptor, and the other end of the pin rod is connected to the cap.

4. The socket and spigot type prefabricated pier according to claim 3, wherein the first shear pin is perpendicular to an outer wall of the adaptor and the second shear pin is perpendicular to an inner wall of the adaptor groove.

5. The socket and spigot type precast pier according to claim 1, wherein the support column further comprises a grouting passage and a grouting inlet, one end of the grouting passage is communicated with the joining groove, and the other end of the grouting passage is communicated with the grouting inlet.

6. The socket-and-spigot prefabricated pier according to claim 1, further comprising an annular stirrup sleeved on the outer walls of the upper longitudinal rib and the lower longitudinal rib.