Construction method for shield holing under complicated working conditions

A technology with complex working conditions and construction methods, applied in underground chambers, earthwork drilling, wellbore lining, etc., can solve problems such as complex construction conditions and achieve the effect of ensuring safety

Active Publication Date: 2011-06-15
SHANGHAI FOUND ENG GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complexity and particularity of the construction conditions, the conventional shield tunneling construction method can no longer be completed

Method used

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  • Construction method for shield holing under complicated working conditions
  • Construction method for shield holing under complicated working conditions
  • Construction method for shield holing under complicated working conditions

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] The shield tunneling construction method under complex working conditions of the present invention:

[0032] 1. In order to ensure the smooth entry of the shield tunnel and ensure the safety of surrounding buildings and underground pipelines, soil reinforcement is carried out at the entrance of the tunnel. Such as figure 1 , as shown in 2, triple pipe high-pressure rotary grouting piles are used for soil reinforcement at the entrance of the shield tunnel (to reduce the impact on the surrounding environment), and the designed pile diameter of a row of piles near the ground wall 7 in the shield tunnel reinforcement area is 800mm , the remaining parts are designed with a pile diameter of 1200mm, arranged in a quincunx shape, and adjacent piles are overlapped by 300mm. The reinforcement of the hole entrance will be carried out in combination with t...

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Abstract

The invention relates to a construction method for shield holing under complicated working conditions. The method comprises the following steps of: 1, strengthening a shield inlet opening; 2, making a shield pass through a wall; and 3, making the shield hole, namely reducing the tunneling speed when a shield machine enters a strengthening area, wherein the tunneling speed is regulated from the original 4cm / min to the range of between 1.0 and 1.5 cm / min, and the pressure of a soil cabin is reduced to 2kg / cm<2> when the shield machine enters the strengthening area by 0 to 2.0m; the pressure of the soil cabin is reduced to 1.5kg / cm<2> when the shield machine enters the strengthening area by 2.0 to 4.0m; the pressure of the soil cabin is reduced to 1kg / cm<2> when the shield machine enters the strengthening area by 4.0 to 5.0m; and the pressure of the soil cabin is reduced to 0kg / cm<2> when the shield machine enters the strengthening area by 5.0m; and supplementing and injecting cement grout through a reserved injected hole of an air shaft bottom plate in time according to the subsidence monitoring conditions of an air shaft when the shield machine enters the bottom of the air shaft for tunneling so as to ensure the safety of the air shaft. By the construction method, the shield can favorably hole, and the safety of surrounding buildings and underground pipelines can be ensured.

Description

technical field [0001] The invention relates to a shield tunneling construction method, in particular to a shield tunneling construction method under the working conditions of many underground pipelines, such as commercial buildings and elevated roads, information optical cables, water supply pipes, gas pipes, rainwater pipes, and water supply pipes. Background technique [0002] The No. 2 working well and the No. 3 working well shield section of the Power Tunnel First Bidding Project start from Hefei Road, Chongqing South Road, Shanghai in the north, and No. 2 working well, along the north-south elevated via Jianguo Middle Road, Xujiahui Road, Liyuan Road, and south to Xietu Road and Luban Road , No. 3 working shaft, the outer diameter of the tunnel is Φ6200mm, the inner diameter is Φ5500mm, and the prefabricated lining segments are assembled through the joints; the width of the lining block is 1200mm, the thickness is 350mm, and the total length of the tunnel is 1130 meters...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/08E21D11/10E21D11/38
Inventor 李耀良严国仙徐其宝梁东青付才
Owner SHANGHAI FOUND ENG GRP
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