Model test apparatus for stimulating tunnel excavation process

A model test device and tunnel excavation technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., to achieve the effect of regular shape and small disturbance

Active Publication Date: 2015-06-17
BEIJING UNIV OF TECH
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Problems solved by technology

[0004] The method of the present invention utilizes the self-developed test device capable of simulating the research on the surrounding rock pressure and formation deformation law during the excavation process of a subway tunnel in a uniform stratum, and can obta

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  • Model test apparatus for stimulating tunnel excavation process
  • Model test apparatus for stimulating tunnel excavation process
  • Model test apparatus for stimulating tunnel excavation process

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[0048] The specific implementation method of the present invention will be further described below in conjunction with the accompanying drawings:

[0049] Such as Figure 1-5 Shown is the core of the present invention, which is a model test device for simulating tunnel excavation process, including model box and stratum system, tunnel structure simulation system, tunnel excavation simulation system, ground deformation measurement system, and surface settlement measurement System, earth pressure monitoring system, air bag loading system. The specific operation process is as follows:

[0050] 1. Model box assembly.

[0051] Install the acrylic board (2) first, that is, connect the model box frame (1) and the acrylic board (2) through bolts to form a test model box, and then remove the upper part of the steel plate (1.0m high) of the rear view baffle to make it convenient for model materials filling.

[0052] 2. Filling of uniform stratum material (sand soil) and implantation of earth...

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Abstract

The invention discloses a model test apparatus for stimulating a tunnel excavation process, and belongs to the field of underground engineering test. Prototaxic sandy soil is adopted as a stratum condition, a lining structure adopts a stress similar galvanized iron thin wall cylinder, a non-contact strain displacement measurement and analysis system is adopted to observe the stratum deformation in the excavation process in a whole course real time manner, and an airbag loading system is adopted to simulate different embedded depths of a tunnel. A model opening mode is a loading and opening mode; and the test apparatus can be used to stimulate the excavation processes of an unlined tunnel and a lining structure possessed tunnel under different embedded depths. The stress similar galvanized iron thin wall cylinder is adopted to stimulate the lining structure, a built-in water capsule system is adopted to stimulate the excavation process and measure force and deformation, and the pressure of soil on the lining structure and the development rule of the pressure under different embedded depths are analyzed. The apparatus provides scientific understanding for the pressure change of surrounding rocks and the deformation mechanism of the stratum in the tunnel excavation process, and provides theoretic bases for tunnel design and construction.

Description

technical field [0001] The invention belongs to the field of underground engineering test technology, can simulate the law of surrounding rock pressure and formation deformation during the excavation process of subway tunnels, provide scientific understanding for the change of surrounding rock pressure and formation deformation mechanism during tunnel excavation, and provide guidance for tunnel design and construction schemes The optimization provides a theoretical basis. Background technique [0002] With the development and progress of the economy and society, urban rail transit has also developed rapidly, especially the urban subway. Most urban subways span urban areas with dense buildings and dense populations, and the ground deformation during construction has an inevitable impact on the safety of existing buildings or structures and people's normal production and life. And with the development of science, technology and economy, the construction of subway tunnel proje...

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Application Information

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IPC IPC(8): G01N33/00
Inventor 赵旭潘志刚路德春张佩杜修力孔凡超张喻捷罗磊
Owner BEIJING UNIV OF TECH
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