Foundation pit excavation and support method of shield starting shaft adjacent to subway

A technology for starting wells and subways, which can be used in excavation, well sinking, shaft equipment, etc., and can solve problems such as inability to meet construction requirements.

Inactive Publication Date: 2020-08-21
CHINA RAILWAY 14TH BUREAU GRP LARGE SHIELD ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for excavating and supporting the foundation pit of the shield tunnel adjacent to the subway, so as to solve the problem in the prior art that the foundation pit of the shield tunnel adjacent to the subway cannot meet the construction requirements

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  • Foundation pit excavation and support method of shield starting shaft adjacent to subway

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] Such as figure 1 As shown, the embodiment of the present invention provides a method for excavating and supporting the foundation pit of the shield tunnel originating shaft adjacent to the subway. The method for excavating and supporting the foundation pit of the shield tunnel or...

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Abstract

The invention provides a foundation pit excavation and support method of a shield starting shaft adjacent to a subway. The foundation pit excavation and support method of the shield starting shaft adjacent to the subway comprises the following steps: 1) using composite anchor piles to reinforce and protect elevated sections and subgrade sections of the adjacent subway to reduce the disturbance tothe ground caused by isolation pile construction; 2) performing enclosure structure construction, wherein the enclosure structure adopts a combination of underground continuous walls and jet groutingpiles, and the joint of two adjacent underground continuous walls are reinforced with a jet grouting pile to stop water; and 3) adopting a horizontal segmentation and vertical layered excavation method for excavation, setting the current excavation layer as the base layer, performing support construction on the base layer after the base layer excavation is completed, and excavating the next layerof the base layer after the support construction of the base layer is completed until the excavation of the foundation pit is completed. Through the technical scheme provided by the application, the problem that the foundation pit of the shield starting shaft adjacent to the subway in the prior art cannot meet the construction requirements can be solved.

Description

technical field [0001] The invention relates to the technical field of shield tunneling shaft construction, in particular to a method for excavating and supporting a foundation pit of a shield tunneling tunnel adjacent to a subway. Background technique [0002] At present, when constructing the foundation pit of the shield tunnel, if there are existing adjacent subway lines around the shield tunnel under construction, the construction process may cause the adjacent subway lines to subside, posing safety hazards. And, there is no effective method for prevention and control in the prior art. [0003] Therefore, there is a problem in the prior art that the foundation pit of the shield tunnel adjacent to the subway cannot meet the construction requirements. Contents of the invention [0004] The invention provides an excavation and support method for a foundation pit of a shield tunnel adjacent to a subway to solve the problem in the prior art that the foundation pit of a shi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02E02D17/04E21D1/10
CPCE02D17/02E02D17/04E21D1/10
Inventor 陈爽杜贵新刘磊高始军赵斌刘善福房新胜李瑞光吴琼
Owner CHINA RAILWAY 14TH BUREAU GRP LARGE SHIELD ENG CO LTD
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