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Shield tunnel subsidence control method based on exploring radar

A technology of shield tunneling and ground penetrating radar, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problem of lack of grouting detection methods

Inactive Publication Date: 2008-12-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] (2) Settlement after construction of double-circle shield
[0005] (3) Construction problems of bypass channel freezing method
The main reason for such a thing to happen is that there is no corresponding mature grouting detection method

Method used

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  • Shield tunnel subsidence control method based on exploring radar
  • Shield tunnel subsidence control method based on exploring radar
  • Shield tunnel subsidence control method based on exploring radar

Examples

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Embodiment 1

[0052] Example 1: A subway tunnel in Shanghai is constructed using the shield tunneling method: the outer diameter of the tunnel is φ6200mm, the inner diameter is φ5500mm, and the prefabricated lining segments are assembled through the joints, with a total of 855 rings, including 2 rings of steel pipe segments; the lining blocks are reinforced concrete, The width is 1200mm, the thickness is 350mm, the design strength of lining segment concrete is C55, and the impermeability grade is ≥S10;

[0053] The shield tail synchronous grouting method is used to inject single slurry in time to fill the annular building gap between the excavation contour and the outer diameter of the segment. After the synchronous grouting is completed, use the segment hoisting hole to carry out secondary reinforcement grouting for the unfilled part. Grouting materials include cement, bentonite, fly ash, sand, admixtures and water.

[0054] Site detection

[0055] On July 25, 2006, the ground-penetratin...

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Abstract

The present invention belongs to the field of tunnel and underground engineering technology. In the concrete, it relates to a shield tunnel settlement control method based on ground-detecting radar. Said control method includes the following steps: adopting ground-detecting radar equipment to make sectional and longitudinal detection of slurry injection after shield tunnel wall, determining and estimating dielectric constant of slurry injection material, making model testing detection to obtain data, extracting characteristic image and characteristic wave, utilizing wavelet neural network automatic identification method to obtain slurry injection layer distribution form, combining said slurry injection layer distribution form with ground settlement monitoring data and making analysis, then defining further construction measure for implementing settlement control according to the detected and analyzed result.

Description

technical field [0001] The invention belongs to the technical field of tunnels and underground engineering, and in particular relates to a settlement control method of a shield tunnel based on ground penetrating radar. Background technique [0002] Although shield tunneling method construction technology has experienced nearly two hundred years of development, it is already a fairly mature construction technology, but there are still many problems in the later settlement control and construction quality management caused by its construction in soft soil strata, which lead to the surrounding strata Excessive deformation occurred, causing many unnecessary engineering accidents. The main causes of subway engineering accidents are: [0003] (1) Longitudinal uneven settlement of subway tunnel during operation period. Mainly include: segment joint opening or even water leakage, mud leakage and track rigid ballast bed detached from tunnel segment. [0004] (2) The post-construct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D11/00
Inventor 黄宏伟谢雄耀杜军张丰收田海洋
Owner TONGJI UNIV
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