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Construction method for prestressed piles and walls with deep foundation ditches being supported

A deep foundation pit support and prestressed pile technology, applied in sheet pile wall, foundation structure engineering, excavation and other directions, can solve the problems of large displacement of pile wall, high cost of structural materials, high requirements for hoisting equipment, and save steel bars. , saving investment costs, convenient production and installation

Inactive Publication Date: 2003-07-23
丁仕辉 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of pile wall has the disadvantages of high consumption of structural materials, high requirements for hoisting equipment, and large displacement of the pile wall.

Method used

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  • Construction method for prestressed piles and walls with deep foundation ditches being supported
  • Construction method for prestressed piles and walls with deep foundation ditches being supported
  • Construction method for prestressed piles and walls with deep foundation ditches being supported

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Experimental program
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Embodiment Construction

[0019] 1. The unbonded steel strands described in the principles of the present invention can be unbonded steel strands of 7Φ3, 7Φ4, and 7Φ5 with a standard strength of more than 1470 MPa.

[0020] 2. Construction method description:

[0021] 2.1 Preliminary selection of the form of the pile wall: Calculate according to the surrounding terrain, landform and geological conditions of the foundation pit according to relevant specifications, and initially select the form of the pile wall, including the size of the pile wall, concrete label, and common reinforcement form, etc. In order to cooperate with the prestressing effect, the concrete grade is preferably above C40;

[0022] 2.2 Preliminary selection of the foundation pit support method: draft the support scheme adopted by the pile wall (cantilever scheme without support, or one or more support schemes);

[0023] 2.3 Calculation of the force of the pile wall: Check and calculate the force of the pile wall according to the for...

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Abstract

A technology for constructing the prestressed support piles and walls for deep foundation pit is disclosed. Its advantages are less investment, and high effect on preventing the shift deformation of foundation pit periphery.

Description

Technical field [0001] The invention relates to civil engineering, in particular to a prestressed construction method for reinforced concrete row piles and reinforced concrete underground continuous walls (hereinafter referred to as pile walls) to carry out excavation of foundation pits under force as retaining walls, which is abbreviated as PPW method in English. Background technique [0002] At present, pile walls used as retaining soil for deep foundation pit support are generally used in deep foundation pit support projects with poor geological conditions, strict requirements for surrounding environmental protection, or limited surrounding topography. According to the stress situation, the form of large size and large reinforcement is usually used to make the pile wall have sufficient strength and rigidity to ensure the safety of foundation pit excavation and the settlement and deformation around the foundation pit can be controlled within the allowable range. This type ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/76E02D17/04
Inventor 丁仕辉陆岸典丁仕煌
Owner 丁仕辉
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