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Structure and method for dissipating excess pore water pressure and reinforcing shield tunnel soil body

A shield tunnel and pore water pressure technology, applied in the engineering field, can solve problems such as aggravating soil erosion, increasing differential settlement, etc., and achieve the effects of increasing soil effective stress, accelerating soil consolidation, and reducing expenditures

Inactive Publication Date: 2013-12-04
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The development of differential settlement will cause the ring seam of the tunnel to open too much, aggravate the water and soil loss caused by leakage, and further increase the differential settlement, causing a vicious circle

Method used

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  • Structure and method for dissipating excess pore water pressure and reinforcing shield tunnel soil body
  • Structure and method for dissipating excess pore water pressure and reinforcing shield tunnel soil body
  • Structure and method for dissipating excess pore water pressure and reinforcing shield tunnel soil body

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with the embodiments shown in the drawings.

[0051] Such as Figure 1 to Figure 2 As shown, the present invention discloses a structure for dissipating excess pore water pressure and strengthening the soil around a shield tunnel, which includes a segment 1 and a first type of grouting hole 2 provided on the segment 1 The second type of grouting hole 3 and the hollow penetration rod 4 which is drilled around the body. The permeation rod 4 is buried in the segment 1 through the first type of grouting hole 2, and the tail end of the permeation rod 4 is connected with the first type of grouting hole. The holes are distributed in the center. Each second type grouting hole is adjacent to four first type grouting holes with infiltration rods. Each first type grouting hole is provided with infiltration rods. The second type of grouting hole for grouting.

[0052] By setting hollow and perforating rods 4 in the ...

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Abstract

The invention discloses a structure for dissipating excess pore water pressure and reinforcing a soil body around a shield tunnel. The structure comprises pipe pieces, first type grouting holes, second type grouting holes and infiltration bars, wherein the first type grouting holes and the second type grouting holes are formed in the pipe pieces, the infiltration bars are arranged to be hollow, and holes are drilled all over the bodies of the infiltration bars. The infiltration bars are integrally arranged inside the pipe pieces in a buried mode through the first type grouting holes, the tail ends of the infiltration bars are connected with the first type grouting holes, the first type grouting holes with the infiltration bars are distributed with the second type grouting holes as centers, four first type grouting holes with the infiltration bars are distributed in the adjacent periphery of each second type grouting hole, and four second type grouting holes used for grouting are distributed in the adjacent periphery of each first type grouting hole provided with the infiltration bar. According to the structure, the infiltration bars are inserted into the grouting holes of the pipe pieces and the infiltration bars are used for extracting water in surrounding soil, so that an infiltrating path is provided for the water contained in the soil body around the tunnel, excess pore water pressure is dissipated, effective stress of the soil is increased and soil solidification is accelerated.

Description

Technical field [0001] The invention belongs to the technical field of engineering, and relates to a device and method for dissipating the excess pore water pressure of the soil around the tunnel, accelerating the consolidation of the soil around the tunnel, and strengthening the soil around the shield tunnel. Background technique [0002] The construction of the subway is now in full swing nationwide. Its high transportation efficiency and large carrying capacity can effectively alleviate the pressure of today's transportation. However, the construction of subway section tunnels has not been developed in my country for a long time. Take Shanghai as an example. According to statistics in 2009, more than 400km of tunnels have been excavated in the 19 years since Metro Line 1 was officially started in 1990. Among them, the top 10 Only 40km will be constructed each year, and 380km will be constructed in the next 9 years. Moreover, Shanghai’s estimated plan for 2020 is 22 lines with ...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D9/06
Inventor 白云蔡国栋
Owner TONGJI UNIV
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