CN220035178U - Prefabricated pier suitable for area with larger earthquake fortification intensity - Google Patents

Abstract

A prefabricated pier suitable for use in areas with greater earthquake-proof fortification intensity, comprising: bearing platform, pre-buried structure and prefabricated hollow concrete pier body; pre-buried structure includes: the method comprises the steps of binding a node reinforcing steel bar net around the lower part of a vertical I-steel; the lower half part of the embedded structure is arranged in the bearing platform and is cast into a whole, the middle part of the embedded structure penetrates through the prefabricated hollow concrete pier body, and the top of the embedded structure is arranged in the capping beam; the top of the prefabricated hollow concrete pier body is provided with a vertical steel bar used for being connected with the bent cap; and the embedded structure and the hollow position inside the prefabricated hollow concrete pier body are filled with concrete core filling sections. The embedded I-steel is directly connected to the bent cap, so that the problem of weak connection points between the bearing platform and the prefabricated bridge pier and between the prefabricated bridge pier and the bent cap can be effectively solved, and the integrity of the lower structure of the bridge is greatly improved.

Description

Prefabricated pier suitable for area with larger earthquake fortification intensity

Technical Field

The utility model belongs to the technical field of bridge engineering, and particularly relates to a prefabricated pier suitable for areas with larger earthquake fortification intensity.

Background

The bridge pier structure of the urban bridge is usually constructed by cast-in-situ, the road surface is required to be blocked during construction, the cast-in-situ construction period is long, the construction quality is not easy to control, the consumption of brackets and templates in construction is large, the construction cost is high, the road traffic capacity of a construction point is directly influenced, and the requirements for the development of urban construction are not good. If the bridge pier adopts a construction mode of prefabricating in a prefabricating factory and directly connecting with a foundation after being hoisted in place on site, the bridge pier can be constructed in parallel, the construction period is greatly shortened, the influence on surrounding traffic and life of residents is reduced, the deformation caused by shrinkage and creep of concrete can be reduced by prefabricating the components, the construction quality is ensured, and better social and environmental benefits exist. However, the connection design of the prefabricated bridge pier and the foundation is a great technical difficulty.

At present, the prefabricated pier is heavy, the prefabricated hoisting tonnage is large, the difficulty in the manufacturing, transporting and installing processes is large, the construction precision of the reserved hole for butt joint of the prefabricated pier and the reserved reinforcing steel bar of the bearing platform is large, the installation failure can be caused by the deviation exceeding a certain value, and the joint part of the bearing platform and the prefabricated pier belongs to weak links, which is also an important factor for limiting the use of the prefabricated component in the areas with large earthquake-proof fortification intensity.

The Chinese patent 201210120445.4 discloses a connection structure of a precast pier and a bearing platform and a butt joint construction method thereof, wherein a joint of a precast concrete pier body and the bearing platform is arranged to form a concave-convex surface to form a shear key, and then the shear key is poured at the same time, so that the construction efficiency can be improved, a certain shearing resistance can be increased, but the positioning problem of a connecting section at the bottom of the precast pier body and the connecting strength problem of the precast pier body and the bearing platform cannot be considered; for another example, chinese patent 201320143661.0 discloses an integral prefabricated pier and foundation structure, in which a twisted steel is embedded in a foundation, the twisted steel sequentially passes through an upper connecting plate and a lower connecting plate and is fixed, although the construction speed is relatively ideal, the anti-sliding capability of the connecting surface is low, the stability of the structure is poor under dynamic load, and the accurate positioning difficulty of the pier weighing hundreds of tons is high during construction and hoisting.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the prefabricated pier which has high connection strength and good earthquake resistance and is suitable for areas with larger earthquake fortification intensity.

The utility model is realized in the following way:

a prefabricated pier suitable for use in areas with greater earthquake-proof fortification intensity, comprising: bearing platform, pre-buried structure and prefabricated hollow concrete pier body;

the pre-buried structure includes: the method comprises the steps of binding a node reinforcing steel bar net around the lower part of a vertical I-steel;

the lower half part of the embedded structure is arranged in the bearing platform to be cast into a whole, the middle part of the embedded structure penetrates through the prefabricated hollow concrete pier body, and the top of the embedded structure is arranged in the capping beam;

the top of the prefabricated hollow concrete pier body is provided with a vertical steel bar used for being connected with the bent cap;

and the embedded structure and the hollow position inside the prefabricated hollow concrete pier body are filled with concrete core filling sections.

Further, the height of the node reinforcing steel bar net is one fifth of the height of the vertical I-steel.

The utility model has the advantages that:

1. through pre-buried I-steel lug connection to the bent cap, can effectively solve cushion cap and prefabrication pier, prefabrication pier and the weak problem of bent cap tie point, greatly increased bridge substructure's wholeness.

2. The steel bar connection is not in the form of reserved steel bars of the bearing platform and reserved holes of the bridge pier, but in the form of reinforcing nodes of the embedded steel bar net is additionally arranged around reserved I-steel.

3. The hollow pier can reduce the manufacturing difficulty, reduce the transportation cost and is convenient to install, and the I-steel is used more, so that the material cost is increased, and the comprehensive analysis is better.

Drawings

The utility model will be further described with reference to the accompanying drawings, in conjunction with examples.

Fig. 1 is a schematic perspective view of the present utility model.

Fig. 2 is a schematic diagram of the embedded structure in the present utility model.

Fig. 3 is a front view of the lower part of the pre-buried structure and the platform after casting in the present utility model.

Fig. 4 is a schematic perspective view of a precast hollow concrete pile body according to the present utility model.

Fig. 5 is a front view of fig. 4.

Detailed Description

As shown in fig. 1 to 5, a prefabricated pier suitable for an area with high earthquake fortification intensity, comprising: bearing platform 1, pre-buried structure 2 and prefabricated hollow concrete pier body 3;

pre-buried structure 2 includes: the transverse I-steel 21 and the vertical I-steel 22 are welded with each other, and the node reinforcing steel bar mesh 23 is bound on the periphery of the lower part of the vertical I-steel 22, and the height of the node reinforcing steel bar mesh is about one fifth of the height of the vertical I-steel 22;

the lower half part of the embedded structure 2 is arranged in the bearing platform 1 to be cast into a whole, the middle part of the embedded structure passes through the prefabricated hollow concrete pier body 3, and the top part of the embedded structure is arranged in a capping beam (not shown);

the top of the prefabricated hollow concrete pier body 3 is provided with a vertical steel bar 31 for connecting with the bent cap;

the hollow positions inside the embedded structure 2 and the prefabricated hollow concrete pier body 3 are filled with concrete core filling sections.

The concrete construction steps are as follows:

step S1: welding a transverse I-steel 21 and a vertical I-steel 22;

step S2: binding node reinforcing steel bar meshes 23 around the lower part of the vertical I-steel 22;

step S3: fixing the welded transverse I-steel 21, the welded vertical I-steel 22 and the welded node reinforcing steel bar net 23 in a bearing platform 1 at the pile foundation position;

step S4: pouring bearing platform concrete;

step S5: hoisting the prefabricated hollow concrete pier body 3, and sleeving the vertical I-steel 22 and the periphery of the node reinforcing steel bar net 23;

step S6: adjusting verticality and fixing;

step S7: pouring concrete at the hollow part in the pier body;

step S8: and constructing the bent cap after the concrete reaches a certain strength.

The embedded I-steel is directly connected to the bent cap, so that the problem of weak connection points between the bearing platform and the prefabricated bridge pier and between the prefabricated bridge pier and the bent cap can be effectively solved, and the integrity of the lower structure of the bridge is greatly improved. The steel bar connection is not in the form of reserved steel bars of the bearing platform and reserved holes of the bridge pier, but in the form of reinforcing nodes of the embedded steel bar net is additionally arranged around reserved I-steel. The hollow pier can reduce the manufacturing difficulty, reduce the transportation cost and is convenient to install, and the I-steel is used more, so that the material cost is increased, and the comprehensive analysis is better.

The above examples and drawings are not intended to limit the form or form of the present utility model, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present utility model.

Claims (2)

1. The utility model provides a prefabricated pier suitable for area that intensity is great is fortified in antidetonation which characterized in that: comprising the following steps: bearing platform, pre-buried structure and prefabricated hollow concrete pier body;

the pre-buried structure includes: the method comprises the steps of binding a node reinforcing steel bar net around the lower part of a vertical I-steel;

the lower half part of the embedded structure is arranged in the bearing platform to be cast into a whole, the middle part of the embedded structure penetrates through the prefabricated hollow concrete pier body, and the top of the embedded structure is arranged in the capping beam;

the top of the prefabricated hollow concrete pier body is provided with a vertical steel bar used for being connected with the bent cap;

and the embedded structure and the hollow position inside the prefabricated hollow concrete pier body are filled with concrete core filling sections.

2. The prefabricated pier applicable to areas with larger earthquake fortification intensity as claimed in claim 1, wherein: the height of the node reinforcing steel bar net is one fifth of the height of the vertical I-shaped steel.