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Testing device and method for simulating stratum cavities caused by subway shield tunnel construction

A technology for stratum cavity and tunnel construction, which is applied in soil material testing, material inspection products, etc., and can solve problems such as uncontrollability and difficulty in simulating cavity shape for stratum cavity.

Inactive Publication Date: 2015-07-22
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The test device can better solve the problem that the formation cavity is difficult to simulate and the shape of the cavity cannot be controlled in the existing model test.

Method used

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  • Testing device and method for simulating stratum cavities caused by subway shield tunnel construction
  • Testing device and method for simulating stratum cavities caused by subway shield tunnel construction
  • Testing device and method for simulating stratum cavities caused by subway shield tunnel construction

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with specific embodiments.

[0021] Such as figure 1 and figure 2 As shown, the test device for simulating the ground cavity caused by the subway shield tunnel construction includes a cavity model, a test model box 8, a heating control device 7, a test soil body 9, an LVDT displacement meter 10, a steel tunnel model with holes 11, and a switch Valve 13, measuring cylinder 14; The cavity model is used to simulate the formation cavity of irregular shape, and the cavity model includes polyurethane liquid bag 3, resistance wire 4, first conduit 5 and second conduit 6, and resistance wire 4 passes through polyurethane liquid bag The second conduit 6 on the 3 is connected to the heating control device 7, and the heating control device 7 controls the heating of the resistance wire, and the first conduit 5 on the polyurethane liquid bag 3 is used to deliver water including water The liquid medium, or the ...

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Abstract

The invention discloses a testing device and method for simulating stratum cavities caused by subway shield tunnel construction. The testing device comprises a cavity model, a test model case (8), a heating control device (7), a test soil mass (9), an LVDT (linear variable differential transformer) displacement meter (10), a steel tunnel model (11) with a hole, a switch valve (13) and a measuring cylinder (14), wherein the cavity model is used for simulating irregular stratum cavities and comprises a polyurethane liquid bag (3), a resistance wire (4), a first conduit (5) and a second conduit (6), the resistance wire (4) penetrates through the second conduit (6) on the polyurethane liquid bag (3) to be connected to the heating control device (7), and the heating control device (7) performs heating control on the resistance wire. With the adoption of the testing device and method for simulating the stratum cavities caused by subway shield tunnel construction, the problems that the stratum cavities are difficult to simulate and cavity shapes cannot be controlled in existing model tests can be better solved.

Description

technical field [0001] The invention belongs to the technical field of underground engineering tests, can simulate stratum cavities of different shapes and scales caused by the construction of subway shield tunnels, and provides a basis for model tests for studying the collapse and expansion mechanism of the cavities. Background technique [0002] In urban subway construction, the shield tunneling method has been more and more widely used due to its fast construction speed and small impact on the surrounding environment. After more than 100 years of development of shield tunneling technology, although great progress has been made, it still inevitably causes disturbance of the surrounding strata, causing stress release of the surrounding soil and stratum deformation, which can easily lead to surface subsidence, There are a series of problems such as the deformation of existing buildings. Among the accidents caused by shield excavation, ground subsidence accidents caused by gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 方勇郭建宁杨志浩张雪金刘书斌
Owner SOUTHWEST JIAOTONG UNIV
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