Peg-pole-prestress supporting system and construction method thereof

A support system and construction method technology, applied in pillars/brackets, sheet pile walls, earthwork drilling and mining, etc., can solve the problem of shield machine efficiency not being fully utilized, and achieve strong ability to control segment deformation and easy monitoring , the effect of simple structure

Inactive Publication Date: 2010-10-06
BEIJING RAIL TRANSIT CONSTR MANAGEMENT +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to speed up the construction of the subway, improve the quality of the project, and ensure the safety of the construction, as many tunnels in the subway section should be constructed using the shield method. However, due to the impact of the station construction, the efficiency of the shield machine has not been fully utilized.

Method used

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  • Peg-pole-prestress supporting system and construction method thereof
  • Peg-pole-prestress supporting system and construction method thereof
  • Peg-pole-prestress supporting system and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: as figure 1 , as shown in 2,

[0019] A pile-column-prestressed support system construction method has the following steps:

[0020] 1) Set the distance from the pile row 1 to the shield tunnel and the diameter and spacing of the pile row 1;

[0021] Set row piles 1 near the outside of the shield tunnel with appropriate diameter and spacing to achieve the effect of isolating the soil.

[0022] 2) The temporary support column 2 erected in the shield tunnel segment 4 ensures the strength and stability of the temporary support column 2 of the shield tunnel;

[0023] After removing part of the shield tunnel segment 4 at the position of the transverse channel 7, the shield tunnel structure under the force of the entire ring segment 4 becomes an open-shaped unstable structure, which may produce relatively large pressure under the pressure of the surrounding soil layer. Large deformation causes the vertical deformation of the segment 4, and the temporary suppo...

Embodiment 2

[0028] Embodiment 2: as figure 1 , as shown in 2,

[0029] A row of piles 1 is constructed close to the outside of the shield tunnel to isolate the soil; a vertical temporary support column 2 is erected on one side of the opening of the segment 4 in the shield tunnel, and at the same time, the remaining segment 5 at the opening and the The segments 4 are connected in series in the longitudinal direction through the prestressed steel cables 3 and stretched to form an overall load-bearing structure, thereby reducing the tension and opening tendency of the segment 5 retained at the opening during the breaking of the segment 4, and achieving The purpose of transferring the force system to the adjacent unremoved segment 4.

[0030] A construction method of a pile-column-prestressed support system: the steps are as follows;

[0031] (1) Pile row 1 with appropriate diameter and spacing is adopted near the outside of the shield tunnel to achieve the effect of isolating the soil;

...

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Abstract

The invention provides a core of continuation station technology in the shield interval: pile-pole-prestressed supporting system and its engineering method. It arranges piles near the outside of the shield tunnel for a certain distance to isolate the field. Erect vertical temporary supporting poles on the opening side of the shield tunnel inner duct piece. Connect the reserved duct piece at the opening and the duct piece in certain range of both sides in series by the prestressed cable on the longitudinal direction and stretch to form an integral loading structure. It can reduce the tension and expanding tendency of the reserved duct piece at the opening during the duct piece damaging process and transfer the force system to the adjacent un-removal duct piece. The invention has great practical application value for the like projects. Its mine advantages include simple structure of the supporting system, strong deformability of controlling the duct piece, explicit dowel and easy monitoring. The supporting system can be standardized produced and repeated utilized. It can provide the traffic condition for the shield tunnel engineering as securing the stress safety maximatily.

Description

technical field [0001] The invention relates to a pile-column-prestress support system (English: Pile-Column-Prestress Support System, PCPrSS for short) and a construction method thereof, belonging to the technical field of underground construction engineering. Background technique [0002] Major cities in my country are developing subways on a large scale. In order to speed up the construction of the subway, improve the quality of the project, and ensure the safety of the construction, as many subway tunnels as possible should be constructed using the shield method. However, due to the influence of the station construction, the efficiency of the shield machine has not been fully utilized. For this reason, a construction plan for expanding the station on the basis of the shield section was launched. This scheme can well solve the contradiction between station construction and section shield construction. In the specific construction, when the shield segment facing the plat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D15/00E21D11/00E02D5/22
Inventor 罗富荣郭婷刘维宁魏怡李晓霖李兆平乐贵平贺少辉惠丽萍朱胜利袁大军张彦孙长军路美丽张良焊张成满张新金郭德友徐凌李海锋陈东许世伟曹宗豪范欢盛杰王占奎孙斌彭彦彬万世春
Owner BEIJING RAIL TRANSIT CONSTR MANAGEMENT
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