CN219385987U - Multi-column assembled pier system of tie beam expansion combined connection pile - Google Patents

Abstract

The utility model relates to a multi-column type assembled pier system for a tie beam expansion combined connection pile, which comprises a capping beam, a pier column, a bearing platform and a pile foundation which are sequentially arranged from top to bottom, wherein the upper surface of the bearing platform is provided with a groove, the bottoms of the pier column are placed in the groove, connection sleeves are reserved at the inner bottoms of the capping beam and the pier column, the upper parts of a plurality of reserved longitudinal steel bars in the pier column are overlapped with a plurality of reserved steel bars embedded in the capping beam through the connection sleeves, the lower parts of a plurality of reserved longitudinal steel bars in the pier column are overlapped with a plurality of reserved steel bars of the bearing platform through the connection sleeves, a post-cast concrete layer is filled and cast at a gap between the pier column and the groove, the post-cast concrete layer adopts UHPC concrete, and adjacent bearing platforms are connected through the tie beam. The crack resistance is improved, the connection integrity is improved, and the construction speed is greatly improved; the adjacent bearing platforms are connected by tie beams so as to be integrally stressed, and the integral rigidity is enhanced; the tie beam uses local bending steel bars, and the bending steel bars bear the action of bending moment, so that the bending bearing capacity of the tie beam is improved.

Description

Multi-column prefabricated pier system with enlarged and combined piles connected by tie beams

technical field

The utility model relates to a multi-column assembled pier system in which pile columns are connected by expanding and combining tie beams, which belongs to the field of bridge engineering.

Background technique

Compared with general construction projects, the bridge and culvert structure has the characteristics of large structural size, heavy component weight, overall band-shaped distribution, and relatively independent components, and is affected by earthquakes. Its seismic performance is poor and its crack resistance is not high. This will greatly increase the construction cost and construction difficulty. In this prefabricated bridge, the post-cast concrete layer UHPC is used for the connection between the pier column and the cap, which improves the crack resistance and improves the overall performance and strength of the pier. The adjacent caps are connected by tie beams so that they can be connected as a whole to bear the force, and the overall rigidity is strengthened.

Utility model content

In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a multi-column assembled pier system in which the tie beams are expanded and combined to connect the piles.

In order to solve the above-mentioned technical problems, the technical solution of the utility model is: a multi-column assembled pier system with beams enlarged and combined to connect piles, including cover beams, pier columns, caps, and pile foundations arranged sequentially from top to bottom. Grooves are arranged on the upper surface of the caps, and the bottom of the pier columns is placed in the grooves. Connecting sleeves are reserved at the inner bottoms of the cover beams and pier columns. The lower part of the steel bars and some reserved steel bars of the caps are overlapped by connecting sleeves, and the gap between the pier column and the groove is filled with a post-cast concrete layer. The post-cast concrete layer is made of UHPC concrete, and the adjacent caps are connected by tie beams.

Preferably, the cover beams, pier columns, caps, tie beams, and pile foundations all adopt concrete structures.

Preferably, the reserved steel bars inside the cap and the cap beam are L-shaped steel bars, which are respectively fixed in the cap and the cap beam, and the vertical sections of the L-shaped steel bars are fixed in the cap and the cap beam by concrete pouring in advance, the reserved steel bars in the cap beam partially extend into the connecting sleeve of the cap beam, and the reserved steel bars in the cap partially extend outside the groove of the cap.

Compared with the prior art, the utility model has the following beneficial effects: the UHPC concrete layer is poured in the gap between the prefabricated pier column and the cap, which improves the crack resistance and increases the integrity of the connection, and because UHPC has the characteristics of high early strength and fast development, the construction speed is greatly improved; the tie beams are used to connect adjacent caps so that they are connected as a whole to bear the force and the overall rigidity is strengthened; local curved steel bars are used in the tie beams, and the curved steel bars bear the bending moment, which improves its bending resistance.

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Description of drawings

Fig. 1 is the pier column structure schematic diagram of the utility model embodiment;

Fig. 2 is the schematic diagram of the connection structure of the cover beam, the pier column and the pile foundation of the utility model embodiment;

Fig. 3 is the overall structure schematic diagram of the utility model embodiment;

Fig. 4 is a diagram of the tie beam reinforcement of the utility model embodiment.

In the figure: 1-pier column; 2-longitudinal reinforcement; 3-connecting casing; 4-reserved reinforcement; 5-post-cast concrete layer; 6-pile foundation;

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and/or "comprises" are used in this specification, they indicate the presence of features, steps, operations, means, components and/or combinations thereof.

As shown in Figures 1 to 4, this embodiment provides a multi-column fabricated pier system in which tie beams are expanded and combined to connect piles, including cap beams, pier columns, caps, and pile foundations arranged in sequence from top to bottom. Grooves are arranged on the upper surface of the caps, and the bottom of the pier columns is placed in the grooves. Connecting sleeves are reserved at the inner bottom of the cap beams and pier columns. A number of reserved steel bars at the base and caps are overlapped by connecting sleeves, and the gap between the pier column and the groove is filled with a post-cast concrete layer. The post-cast concrete layer is made of UHPC concrete, and adjacent caps are connected by tie beams.

In the embodiment of the utility model, the cover beams, pier columns, caps, tie beams, and pile foundations all adopt concrete structures.

In the embodiment of the utility model, the reserved steel bars inside the cap and the cap beam are L-shaped steel bars, which are respectively fixed in the cap and the cap beam. The vertical sections of the L-shaped steel bars are respectively fixed in the cap and the cap beam by concrete pouring in advance. The reserved steel bars in the cap beam partially extend into the connecting sleeve of the cap beam, and the reserved steel bars in the cap partially extend outside the groove of the cap.

In the embodiment of the utility model, the connecting sleeve is a grouting corrugated pipe.

In the embodiment of the utility model, the tie beam uses local bent steel bars.

A construction method for a multi-column assembled pier system with beams enlarged and combined to connect piles, which is carried out according to the following steps: 1) Prefabricate pier columns in a factory, reserve a number of longitudinal steel bars in the pier columns, pre-embed grouting bellows at the bottom of the pier columns, wherein the reserved longitudinal steel bars penetrate into the grouting bellows; L-shaped steel bar, with a groove on the upper part of the cap, and the L-shaped steel bar extends out of the groove of the cap; 3) At the construction site, assemble the pier column, pile foundation and cover beam, use the lifting equipment to lift the prefabricated pier column, place the lower part of the pier column in the center of the cap groove, insert the partially protruding steel bar in the cap groove into the grouting bellows reserved at the bottom of the pier column, and insert the reserved longitudinal steel bars protruding from the upper part of the pier column into the grouting bellows reserved for the cover beam, so that the longitudinal reinforcement in the pier column 4) Pour concrete into the grouting bellows to complete the lapping of the longitudinal reinforcement of the cap beam and the pier column, and the lapping of the longitudinal reinforcement of the cap and the pier column; 5) Fill and pour UHPC concrete in the gap between the pier column and the groove of the cap; 6) Carry out the tie beam connection construction between the adjacent caps, using the existing cast-in-place technology of the support formwork, and complete the construction after the tie beam is cured.

In this structure, the reserved longitudinal reinforcement in the prefabricated pier columns, caps and cap beams makes the construction more convenient, improves the construction efficiency, and reduces the difficulty of on-site pouring; UHPC is poured in the gap between the prefabricated pier columns and the caps, which improves the crack resistance and increases the integrity of the connection, and because UHPC has the characteristics of high early strength and rapid development, the construction speed is greatly improved; the adjacent caps are connected by tie beams to make them connected as a whole. its flexural capacity.

The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model in other forms. Any skilled person who is familiar with this field may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model without departing from the content of the technical solution of the utility model still belong to the protection scope of the technical solution of the utility model.

Claims (3)

1. A multi-column type assembled pier system of tie beam expansion combined connection pile is characterized in that: including last bent cap, pier stud, cushion cap, the pile foundation that sets gradually down, the upper surface of cushion cap sets up the recess, the pier stud bottom is placed in the recess, the interior bottom of bent cap and pier stud is all reserved there is adapter sleeve, a plurality of reservation vertical reinforcing bars upper portions of pier stud inside and a plurality of reservation reinforcing bars of burying in the bent cap pass through adapter sleeve overlap joint, a plurality of reservation vertical reinforcing bars lower part of pier stud inside and a plurality of reservation reinforcing bars of cushion cap pass through adapter sleeve overlap joint, the clearance department between pier stud and the recess is filled and is pour the post-cast concrete layer, post-cast concrete layer adopts UHPC concrete, connect through the tie beam between the adjacent cushion cap.

2. The tie beam expansion composite connection pile multi-column fabricated pier system of claim 1, wherein: and the capping beam, the pier column, the bearing platform, the tie beam and the pile foundation are all of concrete structures.

3. The tie beam expansion composite connection pile multi-column fabricated pier system of claim 1, wherein: the reserved steel bars inside the bearing platform and the cover beam are L-shaped steel bars, the L-shaped steel bars are respectively fixed in the bearing platform and the cover beam, the vertical sections of the L-shaped steel bars are respectively fixed in the bearing platform and the cover beam through concrete pouring, the reserved steel bars in the cover beam locally extend into the connecting sleeve of the cover beam, and the reserved steel bars in the bearing platform locally extend out of the grooves of the bearing platform.