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Liquefied foundation treatment device and method for reducing sand saturability on periphery of tunnel

A liquefied foundation and treatment device technology, applied in the field of civil engineering, can solve the problems of not being able to efficiently reduce the saturation of sand and soil outside the tunnel, reduce the saturation of sand and soil outside the tunnel, and achieve controllable construction quality, low cost, and simple equipment Effect

Pending Publication Date: 2021-02-05
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a liquefaction foundation treatment device and method for reducing the saturation of sand and soil outside the tunnel, and overcome the defect that the previous technology cannot efficiently reduce the saturation of sand and soil outside the tunnel

Method used

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  • Liquefied foundation treatment device and method for reducing sand saturability on periphery of tunnel

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Embodiment Construction

[0033] The present invention will be described in detail below in combination with specific embodiments.

[0034] On the basis of the theory of electrolytic desaturation, the present invention proposes a liquefaction foundation treatment device that reduces the saturation of sand and soil around the tunnel within a certain length. connected coils to electrolyze part of the pore water in the saturated sand to O 2 and H 2 , so as to achieve the effect of reducing the sand saturation around the tunnel. On the basis of maintaining the saturated sand foundation around the tunnel, the air content of the saturated sand foundation around the tunnel is increased to make the saturated sand foundation become unsaturated, so as to reduce the saturation of the sand around the tunnel.

[0035] The device includes a coil 9 and a resistance testing element 8; the coil 9 includes a positive coil and a negative coil, which are set in the liquefiable sand foundation 5 outside the tunnel 1, and...

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Abstract

The invention relates to a liquefied foundation treatment device and method for reducing the sand saturability on the periphery of a tunnel. The liquefied foundation treatment device comprises a coiland a resistance monitoring element. The coil comprises a positive electrode coil and a negative electrode coil and is annularly arranged in a liquefiable sand foundation outside the tunnel, and real-time equivalent resistance information of sand between the positive electrode coil and the negative electrode coil can be transmitted to a switch on the ground in a wireless transmission mode throughthe resistance monitoring element. The method for generating H2 and O2 by electrolyzing pore water in saturated sand on the outer side of the tunnel is adopted, the saturated liquefied sand foundationon the periphery of the tunnel is changed into a sand foundation in a desaturation state, and the defect that a foundation structure and a tunnel structure are damaged due to the fact that high-pressure air splits a sand foundation soil body on the outer side of the tunnel through a foundation inflation method is overcome.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a liquefaction foundation treatment device and method for reducing the saturation of sand and soil around tunnels. Background technique [0002] Sandy soil liquefaction refers to the sudden violent vibration of saturated loose silt and fine sand, and the soil skeleton tends to be compacted and compressed, resulting in the pore water in the sandy soil being unable to discharge the soil in a short time, making the effective stress between soil particles gradually Reduced to zero, eventually the sand loses its shear strength and presents a liquid earthquake damage phenomenon. In recent years, the construction of tunnel infrastructure in my country has developed rapidly. The liquefaction of sand and soil around the tunnel has caused insufficient bearing capacity of the sand and soil around the tunnel, resulting in serious damage such as local fractures and water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/11E02D1/02G01N27/04
CPCE02D3/11E02D1/027G01N27/045
Inventor 张海高志宏朱小蓉王天明冯义刘新军李世辉相旭胡双平王洪波王俊邓保顺
Owner CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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