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A construction method for subsidence control of shield tunneling through building groups in water-rich silt-sand strata

A settlement control and construction method technology, which is applied in underground chambers, earthwork drilling, CAD numerical modeling, etc., can solve problems such as damage and building cracks, and achieve cost savings, broad promotion prospects, and good application effects

Active Publication Date: 2021-12-14
CHINA RAILWAY NO 3 GRP CO LTD +1
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Problems solved by technology

[0004] The present invention solves the problem of cracking and damage of buildings caused by excessive subsidence of shield tunneling machines in soft water-rich silt sand strata in the past.

Method used

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  • A construction method for subsidence control of shield tunneling through building groups in water-rich silt-sand strata
  • A construction method for subsidence control of shield tunneling through building groups in water-rich silt-sand strata
  • A construction method for subsidence control of shield tunneling through building groups in water-rich silt-sand strata

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] The embodiment is for a certain subway construction section undertaken by the applicant. According to ground surveying and mapping, there are many low-rise buildings along the tunnel in this section, and there are many buildings near the tunnel. The risk of shield tunneling through buildings is high, and the interval passes through XX Building, AA Zone 1, BB Zone 2 and other building groups, especially AA Zone 1 and BB Zone 2 are mainly self-built houses with strip-shaped shallow foundations, and the height of the houses is generally 5 ~7m, the buried depth of the foundation is generally 0.5~1.0m, and it is located directly above the interval line, which increases the ...

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Abstract

The invention belongs to the technical field of tunnel construction, and in particular relates to a settlement control construction method for shield tunneling under a water-rich silt sand stratum to pass through building groups. In order to solve the problem of cracking and damage of the buildings caused by the excessive settlement of the shield machine under the weak stratum of water-rich silt sand in the past. Specifically, before the shield excavation reaches the affected area, the numerical model analysis of the construction of the underpass building group is carried out in advance by using the geotechnical finite element analysis software, and the shield parameters controlled when the underpass is obtained; the underpass construction process During the process, strict control of construction parameters and synchronous grouting are used to reduce the impact on the ground surface and building foundation. The invention improves the drawbacks that the previous shield tunneling machine passes through building groups, and the buildings are cracked and damaged due to excessive settlement, and the application effect is good. The construction of building groups under earth pressure balance shield under different crossing geological conditions, especially in the construction of structures under shield tunneling in weak silt sand strata, has a very broad prospect of promotion.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a settlement control construction method for shield tunneling under a water-rich silt sand stratum to pass through building groups. Background technique [0002] The shield tunneling method is a fully mechanized construction method in the underground excavation method. With the vigorous development of rail transit construction in major cities, the shield tunneling method construction has the characteristics of good safety, high efficiency and low noise. The method has been widely used. When shield excavates in water-rich and weak strata, the settlement is not easy to control because of the poor stability of the water-rich and soft stratum. The excessive settlement of the building will cause the building to crack, tilt or even collapse, resulting in significant economic losses and bad social impact. [0003] At present, the theory of shield passing throug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/04E21D9/06E21D9/093E21D11/00E21D11/08E21D11/10E21D11/38G06F30/13G06F30/23G06F111/10
CPCE21D9/04E21D9/0607E21D9/093E21D11/003E21D11/08E21D11/105E21D11/383E21D11/385
Inventor 孙伯乐杜红波曹建辉应信群张幼文陶军武申秦勇薛瑞梁卿恺李刚柱赵昕龙刘宇杨森
Owner CHINA RAILWAY NO 3 GRP CO LTD
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