Novel pile foundation underpinning structure and method

A pile foundation underpinning and pile foundation technology, which is applied in the direction of foundation structure engineering, foundation structure repair, construction, etc., can solve the problems of difficulty in the construction of pile foundation underpinning, achieve no impact on the bridge landscape, and overcome the excavation of foundation pits. The effect of large and clear structural force

Active Publication Date: 2016-11-02
福州轨道交通设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the present invention provides a new pile foundation underp

Method used

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  • Novel pile foundation underpinning structure and method
  • Novel pile foundation underpinning structure and method
  • Novel pile foundation underpinning structure and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] see figure 1 , figure 2 , image 3 as well as Figure 4 , a kind of new pile foundation underpinning method of the present invention, comprises the following steps:

[0050] Step 1, drilling holes on the ground 2 above the old pile foundation 1, and constructing a new bridge pier pile foundation 3, pouring a new bridge pier cap 4 at the top of the poured new bridge pier pile foundation;

[0051] Step 2, install the temporary support frame 5 on the new bridge pier cap, and use the temporary support 6 and the jack 7 to jack up the bridge 8 on the temporary support frame, so that the old support is not stressed;

[0052] Step 3, remove the old pier 9 and pull out the old pile foundation 1;

[0053] Step 4, build a new cap to connect the new pile foundation, and build a new bridge pier on the new cap;

[0054] Step 5, using jacks, support frames, etc., to transfer the load on the temporary support to the new pier;

[0055] Step 6. Remove the temporary support frame. ...

Embodiment 2

[0059] see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 as well as Figure 6 , a new pile foundation underpinning structure of the present invention, comprising a new bridge pier pile foundation, a new bridge pier cap, a post-cast cap, a temporary support frame, a temporary support and a jack;

[0060] There are new bridge pier foundations on both sides of the old pile foundation, new bridge pier caps are installed on the top of the new bridge pier pile foundations, temporary support frames are installed on the new bridge pier caps, and temporary supports and jacks are installed between the temporary support frames and the bridge. The post-cast caps are set between the two new pier caps and connected as a whole.

[0061] There are new pier pile foundations on both sides of the old pile foundation, the pile foundation axis of the new bridge pier is perpendicular to the ground, and a new pier cap is respectively arranged on the top of the two new pier pile founda...

Embodiment 3

[0064] see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7 , a kind of new pile foundation underpinning method of the present invention, comprises the following steps:

[0065] Step 1. Construction of pile foundations for new bridge piers;

[0066] Step 2: Install a temporary support frame on the new bridge pier cap, and transfer the load from the upper part of the bridge to the lower part through the new pile foundation through the temporary support and the jack;

[0067] Step 3: Remove the old bridge piers and pull out the old pile foundations.

[0068] Step 4: Build a new cap to connect the new pile foundation, and build a new bridge pier on the new cap.

[0069] Step 5. Use jacks, support frames, etc. to transfer the load on the temporary support to the new pier.

[0070] Step 6. Remove the temporary support frame.

[0071] In this embodiment, said step 2 also includes the following content:

[0072] 1. When installing th...

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Abstract

The invention discloses a novel pile foundation underpinning structure and method. The method comprises the following steps: step 1, a new pier pile foundation is constructed; step 2, a temporary support is mounted on a new pier bearing platform, and the load on the upper part of a bridge is transmitted to the lower part through the novel pier pile foundation by the temporary support and a jack; step 3, an old pier is dismantled and an old pile foundation is removed; step 4, a new bearing platform is constructed and connected with the new pile foundation, and a new pier is constructed on the new bearing platform; step 5, the load on the temporary support is transferred to the new pier by utilizing the jack, a support frame and the like; step 6, the temporary support is dismantled. The structure stress is clear, the structure doesn't relate to the original lower part structure, the construction difficulty is relatively low, the landscape of the bridge is not influenced, the support constructed by utilizing the new pile foundation is more reliable, and the novel pile foundation underpinning structure and method solve the problems that the traditional pile foundation underpinning is large in foundation pit excavation, high in risk, cost and construction difficulty, incapable of removing the old pile foundation, and the like.

Description

technical field [0001] The invention relates to a new structural design and construction method of pile foundation underpinning. Background technique [0002] In the existing technology, the traditional method of pile foundation underpinning is: using the original pier, constructing new pile foundation, underpinning cap, jack and underpinning beam to form a new stress system, and then implement the old pile foundation removal. The traditional method has problems such as large foundation pit excavation, high risk, high cost, difficult construction, and inability to pull out the old pile foundation. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention provides a new pile foundation underpinning scheme, which solves the problem that traditional pile foundation underpinning construction is difficult. [0004] The invention provides a new method for pile foundation underpinning, comprising the following steps: [...

Claims

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Application Information

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IPC IPC(8): E01D22/00E02D37/00
CPCE01D22/00E02D37/00
Inventor 季国富林峰蔡金山黎泰良赵欣月刘干典郑宇鑫马延陈强施鹏程林玉燕黄锦真蔡亚文
Owner 福州轨道交通设计院有限公司
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