Method for leading shield to pass through underground structure

An underground structure and shield technology, which is applied in the direction of earth drilling, mining equipment, tunnels, etc., to achieve the effect of eliminating adverse effects

Active Publication Date: 2011-09-07
SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It may happen that the underpass project is built first, and then the tunnel is built under it; it may also happen that the tunnel is built first and then the underpass project is built; it is also possible that both are built at the same time

Method used

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  • Method for leading shield to pass through underground structure
  • Method for leading shield to pass through underground structure
  • Method for leading shield to pass through underground structure

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Embodiment Construction

[0024] The features of the present invention and other related features will be further described in detail below in conjunction with the accompanying drawings through embodiments, so as to facilitate the understanding of those skilled in the art:

[0025] Such as Figure 1-3 As shown, the numbers 1-9 represent: base plate 1, base plate cushion layer 2, pressure relief hole 3, central column 4, water-stop steel plate 5, reinforced concrete structure 6, head plate 7, steel pipe 8, and ground connection wall 9.

[0026] Such as Figure 1-3 Shown, the construction process of the present invention is as follows:

[0027] 1. Construction of the lower interchange project

[0028] In this construction process, a row of pressure relief holes is reserved every 6m along the axis of the tunnel in the crossed area of ​​the bottom plate 1 of the underground structure. The specific process is as follows:

[0029] 1) When pouring the floor cushion 2, a prefabricated part is used to insert...

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Abstract

The invention relates to the technical field of safety protection of shield construction, in particular to a method for leading a shield to pass through an underground structure. The method relates to a bottom plate of the underground structure for shield construction therebelow; and the bottom plate comprises a bottom plate cushion layer and a reinforced concrete structure fixed on the bottom plate cushion layer. The invention is characterized in that the method comprises the following steps: a) embedding at least two pressure relief holes in a passed area of the bottom plate; b) carrying out shield propelling construction below the bottom plate structure generated in the step a); and c) after the shield tunnel construction is completed, carrying out plugging treatment to the pressure relief holes. The method has the advantages of: effectively reducing, even eliminating, the negative influence on a lower intersecting structure when in the shield propelling construction, especially onthe bottom plate and the structures at the two sides.

Description

technical field [0001] The invention relates to the technical field of safety protection for shield construction, in particular to a method for shield tunneling through underground structures. Background technique [0002] The shield tunneling method is widely used in soft soil areas such as Shanghai. The soil layers of these urban tunnels are often rich in groundwater. The earth pressure balance type shield is more obvious in front of the earth, and at the same time, the diffusion of groundwater at this position requires a process, resulting in a relatively high pore water pressure (up to 80kPa) near the excavation surface, so the stratum in a certain range in front of the shield machine shows Uplift deformation. The strata behind the shield tunneling were subsidence due to soil loss, improper grouting pressure, untimely etc., and the later consolidation and subsidence of the soil. All of these will have adverse effects on the pipelines and buildings around the tunnel. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/04
Inventor 葛以衡朱继文曾英俊柳林齐陈宇
Owner SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
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