CN211947918U

CN211947918U - Connection structure of prefabricated pier segment

Info

Publication number: CN211947918U
Application number: CN202020472762.2U
Authority: CN
Inventors: 俞文生; 邱文东; 王运金; 曾明辉; 黄智华; 程继顺; 曹林辉; 刘长明
Original assignee: Jiangxi Provincial Expressway Investment Group Co ltd
Current assignee: Jiangxi Provincial Expressway Investment Group Co ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-11-17
Anticipated expiration: 2030-04-03

Abstract

The utility model discloses a connection structure of prefabricated pier segment, indulge the muscle including the pier body, bellows, first spiral stirrup, second spiral stirrup, first muscle, third spiral stirrup and second of indulging. Compared with the prior art, the utility model adopts the mode of bonding the reinforcing steel bars to connect the prefabricated pier segments, the shear keys shaped like tenon-and-mortise joints are arranged between the prefabricated pier segments, the prefabricated pier segments are reduced in pressure, and the problems of prestress loss and uneven tension stress caused by prestress are avoided; in addition, the shearing force key and the combined action of reinforcing bar in the seam for pier still has good horizontal shear strength.

Description

Connection structure of prefabricated pier segment

Technical Field

The utility model relates to a bridge structures technical field especially relates to a connection structure of prefabricated pier segment.

Background

The prefabrication and assembly technology of the bridge structure is developed since, the interference to traffic and the influence to the environment are reduced to a great extent, and the construction speed is improved. In the past decades, the prefabrication and assembly technology for bridge construction has been widely used worldwide.

At present, the most commonly used prefabricated assembly structure of a bridge substructure is a post-tensioned prestressed segment pier. Many studies have demonstrated that unbonded post-tensioned pre-fabricated piers are able to withstand large lateral deformations with small residual displacements because the pre-stressing force is able to provide a restoring force to the pier segments. In addition, the prestressed tendons act on the axial direction of the pier, so that the friction between the segments is increased, and therefore, the shear key does not need to be considered in the design of the prefabricated pier. In fact, the shear key which is applied to the prefabricated bridge pier in the past mainly has the function of facilitating segment assembling construction, but does not improve the integral shearing resistance of the bridge pier. However, since the pier itself is subjected to a large axial force without an external force, the additional prestress may adversely affect the ductility of the pier and may stress the segments too much. Further, the loss of prestress and the unevenness of prestress application inevitably occur in the prestressing process, and these disadvantages become more apparent as the prestress application becomes larger.

The paper entitled "cai fai-quine tenon-mortise joint segment assembling pier seismic performance numerical analysis [ D ]. Harbin industrial university, 2014" mentions the idea of splicing prefabricated pier segments by adopting a tenon-mortise structure and tensioning unbonded prestressed tendons by leaving channels in the middle. There are two disadvantages: firstly, such concept still uses the prestressed tendons to connect the various segments, and has the disadvantage of prestressing. Secondly, the application of prestress and the axial force born by the pier in use enable the friction force generated between the segments to provide a larger shearing resistance effect, so that the designed mortise-tenon joint structure can not fully exert the shearing resistance effect in actual use and can be absent.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a connect reliable, the convenient connection structure of prefabricated pier segment of construction for solve the technical problem that above-mentioned prior art exists, can reduce the segment pressurized, can make the pier have good horizontal shear strength again.

In order to achieve the above object, the utility model provides a following scheme:

the utility model discloses a connection structure of prefabricated pier segment section, include:

the pier body is formed by pouring concrete, a groove is formed in the upper surface of the pier body, a tenon is arranged on the lower surface of the pier body, a glue outlet groove is formed in the lower surface of the tenon, epoxy glue is smeared in the groove, the tenon is inserted into the groove of the other pier body, the shape of the tenon is the same as that of the groove, and the size of the tenon is smaller than that of the groove;

the corrugated pipes are pre-embedded in the pier bodies and distributed around the grooves, openings are formed in positions, corresponding to the positions of the corrugated pipes, of the upper surface of the pier bodies, and high-strength mortar is filled in the corrugated pipes;

the first spiral stirrup is pre-embedded in the pier body, and the corrugated pipe is fixed on the first spiral stirrup;

the second spiral stirrup is embedded in the pier body and is positioned between the groove and the tenon;

the first longitudinal ribs are fixed on the second spiral stirrups, the upper parts of the first longitudinal ribs are pre-buried in the pier body, the lower parts of the first longitudinal ribs extend out of the pier body, and the first longitudinal ribs correspond to the corrugated pipes one by one;

the upper part of the third spiral stirrup is embedded in the main body of the pier body, and the lower part of the third spiral stirrup is embedded in the tenon;

the second is indulged the muscle, the second is indulged the muscle and is fixed in on the third spiral stirrup, the second is indulged the upper portion of muscle pre-buried in the main part of pier body, the second is indulged the lower part pre-buried of muscle in the tenon.

Preferably, the pier body has a hollow region inside.

Preferably, the steel plate further comprises a fourth spiral stirrup and a third longitudinal stirrup, the fourth spiral stirrup and the third longitudinal stirrup are embedded in the pier body, the fourth spiral stirrup is located on the outer side of the groove, and the third longitudinal stirrup is fixed on the fourth spiral stirrup.

Preferably, the main body cross section of the pier body is circular or rectangular.

Preferably, the tenon has a circular or rectangular cross section.

Preferably, the corrugated pipes are distributed in a circle or a square or a symmetrical straight line.

The utility model discloses for prior art gain following technological effect:

1. the utility model discloses an each component can realize that factory prefabrication, standardized construction, quality are reliable, disturb little to the peripheral traffic in scene.

2. The utility model discloses need not the on-spot concrete of pouring in a large number, it is convenient to be under construction, and the time limit for a project is shorter.

3. The utility model discloses a connection structure can be applicable to most pier types.

4. The utility model discloses a prefabricated pier segment is connected to the mode of bonding reinforcing bar, is furnished with the shear force key of shape similar tenon fourth of twelve earthly branches between the prefabricated pier segment, compares in the more commonly adopted post-tensioned prestressing force pier segment at present, the utility model discloses a prefabricated pier segment pressurized reduces, does not have prestressing force loss and the inhomogeneous problem of tensile stress that prestressing force brought yet; in addition, the shearing force key and the combined action of reinforcing bar in the seam for pier still has good horizontal shear strength.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic overall structure view of a connection structure of prefabricated pier segments according to the embodiment;

fig. 2 is a schematic view of an internal structure of a connection structure of prefabricated pier segments according to the embodiment;

fig. 3 is an assembly view of a connection structure of the precast pier segment according to the embodiment;

FIG. 4 is a schematic cross-sectional view of a groove position of a square pier body;

FIG. 5 is a schematic cross-sectional view of the tenon position of the square pier body;

FIG. 6 is a schematic cross-sectional view of the groove position of the circular pier body;

FIG. 7 is a schematic cross-sectional view of the tenon position of the pier body;

description of reference numerals: 1. a groove; 2. a bellows; 3. a tenon; 4. a glue outlet groove; 5. the first longitudinal rib.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

As shown in fig. 1 to 7, this embodiment provides a connection structure of prefabricated pier segment, including pier body, bellows 2, first spiral stirrup, second spiral stirrup, first vertical bar 5, third spiral stirrup and second vertical bar.

Wherein, the pier body is formed for concrete placement, and the upper surface of pier body is equipped with recess 1, and the lower surface of pier body is equipped with tenon 3, and the lower surface of tenon 3 is equipped with out gluey groove 4. The groove 1 is used for smearing epoxy glue, and the tenon 3 is used for being inserted into the groove 1 of the adjacent pier body. After the epoxy glue is solidified, the tenon 3 and the groove 1 are mutually matched to realize the connection of two adjacent pier bodies. The shape of the tenon 3 is the same as that of the groove 1, and the size of the tenon 3 is smaller than that of the groove 1 so as to facilitate the insertion of the tenon and the groove. Bellows 2 is pre-buried in the mound and distributes around recess 1, and the upper surface of the mound and the opening of 2 position correspondences of bellows are used for filling high strength mortar in the bellows 2. First spiral stirrup is pre-buried in the mound, and bellows 2 is fixed in on the first spiral stirrup, realizes the location of bellows 2 through first spiral stirrup. The second spiral stirrup is pre-buried in the pier body and is located between the groove 1 and the tenon 3, and the first longitudinal reinforcement 5 is fixed on the second spiral stirrup and realizes the first positioning of the longitudinal reinforcement 5 through the second spiral stirrup. The upper portion of the first longitudinal bar 5 is pre-buried in the pier body, the lower portion of the first longitudinal bar 5 extends out of the pier body, and the size and the arrangement of the first longitudinal bar 5 are determined by engineering practice and bar arrangement rate requirements. The first muscle 5 of indulging is corresponding with the position one-to-one of bellows 2, and first muscle 5 of indulging is used for inserting in the bellows 2 on the adjacent pier body, and the first muscle 5 anchor of indulging of high strength mortar solidification back should satisfy the anchor requirement of first muscle 5 of indulging in the bellows 2 that corresponds, the degree of depth of bellows 2. The upper part of the third spiral stirrup is pre-buried in the main body of the pier body, and the lower part of the third spiral stirrup is pre-buried in the tenon 3. The second is indulged the muscle and is fixed in on the third spiral stirrup, indulges the location of muscle through the third spiral stirrup realization second, and the second is indulged the upper portion of muscle and is pre-buried in the main part of the mound body, and the lower part of muscle is pre-buried in tenon 3 is indulged to the second. The strength of the part of the tenon 3 is improved through the combination of the second longitudinal rib and the third spiral stirrup.

According to the connecting structure of the prefabricated pier sections, before assembly, epoxy glue is coated on the grooves 1 in the upper portions of the assembled sections in advance, high-strength mortar is poured into the pre-embedded corrugated pipes 2, then the tenons 3 of the sections to be assembled are placed into the grooves 1 of the assembled sections, longitudinal ribs extending out of the lower portions of the sections to be assembled are inserted into the corrugated pipes 2, filled with the high-strength mortar, in the upper portions of the assembled sections, and accordingly the two adjacent prefabricated pier sections are assembled. This connected mode can apply to assembling of prefabricated pier, and every pier shaft festival section except that the festival section of being connected with cushion cap and bent cap need make the change, and the structure of other prefabricated festival sections is the same completely, all can be prefabricated in the mill, is favorable to improving the efficiency of construction.

In order to reduce the overall weight and the construction cost, a hollow area can be arranged inside the pier body.

In order to improve the strength of 1 position in recess, avoid recess 1 to destroy, this embodiment still includes pre-buried fourth spiral stirrup and the third longitudinal bar in the pier body. The fourth spiral stirrup is located outside the groove 1, and the third longitudinal bar is fixed on the fourth spiral stirrup.

It should be noted that, in this embodiment, the cross section of the main body of the pier body may be circular or rectangular, and the cross section of the tenon 3 may be circular or rectangular, which can be selected by those skilled in the art according to actual needs. The corrugated pipes 2 can be distributed on the pier body in a round shape, a square shape or a symmetrical linear shape, as long as the distribution shapes are symmetrical so as to balance the stress.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. A connection structure of prefabricated pier segments, comprising:

2. The connection structure of a precast pier segment according to claim 1, wherein the pier body has a hollow region inside.

3. The connection structure of a prefabricated pier segment according to claim 1, further comprising a fourth spiral stirrup and a third longitudinal bar which are pre-buried in the pier body, wherein the fourth spiral stirrup is located outside the groove, and the third longitudinal bar is fixed to the fourth spiral stirrup.

4. The connection structure of a precast pier segment according to claim 1, wherein the cross-section of the main body of the pier body is circular or rectangular.

5. The connection structure of a precast pier segment according to claim 1, wherein the tenon has a circular or rectangular cross-section.

6. The connection structure of prefabricated pier segments according to claim 1, wherein the corrugated tubes are arranged in a circular or square shape or in a symmetrical and linear shape.