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Double-circular shield shallow earthing construction method

A double-circle shield and construction method technology, which is applied in the construction of shield tunneling machine and the construction field where the double-circle shield passes through the shallow overlying soil, can solve the problems of reducing construction risks and complex construction parameters.

Inactive Publication Date: 2007-03-21
SHANGHAI TUNNEL ENGINEERING CO. LTD.
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies and defects of the prior art, the present invention provides a construction method for double-circle shield tunneling through shallow covering soil, so that it can meet the characteristics of complex construction parameter setting and many underground unforeseen factors for double-circle shield tunneling through shallow covering soil , in the case of stacking in the crossing area, protection of important municipal pipelines, reasonable adjustment of construction parameters and successful crossing of shallow overlying soil, controlling the posture and axis of the shield not only reduces construction risks, but also ensures project quality

Method used

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Embodiment Construction

[0069] Provide following embodiment in conjunction with content of the present invention:

[0070] Taking a rail transit double-circle shield section as an example, the project includes crossing raw water box culverts, common ditches, and short-distance crossing of private houses. In the section of ring 482~519 in the lining, the tunnel construction will be carried out through the shallow overlying soil. In the section of ring 505~519, the ground elevation of the tunnel entry is +3.827m, and the design top elevation of the shield is -1.306m~-0.225m , the covering depth of this section gradually changes from 4.361m to 4.0m, and the tunnel is in the uphill section of 27‰, and the construction is carried out with a small curvature radius of R420m when turning left. Such a small covering soil thickness is the first time in the field of double-circle construction. In the shallow covering soil area, there are 11 important municipal pipelines such as gas pipes, water supply pipes, an...

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Abstract

The present invention relates to a double circular shield construction method passing through shallow covered earth belonging to the field of building engineering technology. Said construction method includes the following steps: 1, earlier stage preparation; 2, tracking and monitoring; 3, shallow covered earth construction; 4, passing through shallow covered earth and making secondary grouting; 5, emergency measure and ground surface bleeding treatment.

Description

technical field [0001] The invention relates to a construction method of a shield tunneling machine, in particular to a construction method of a double-circle shield tunneling through shallow covering soil, and belongs to the field of construction engineering. Background technique [0002] The double-circle shield has the advantages of saving underground space resources, improving the ability of subway lines to pass through narrow roads, reducing engineering investment, effectively reducing the area of ​​tunnel excavation and cutting sections, and reducing the width or depth of working wells. It should be used in the construction of rail transit tunnels. In general, if the thickness of the covering soil at the top of the double-circle shield is less than 85% of the diameter of the shield, it is regarded as shallow covering soil construction. [0003] When the double-circle shield tunnels through the shallow overlying soil, it is prone to some adverse conditions such as larg...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D9/093E21D11/00
Inventor 顾春华吴惠明吴列成潘浩何国平
Owner SHANGHAI TUNNEL ENGINEERING CO. LTD.
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