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Model test device and method for expansion-contraction soil tunnel under the action of dry-wet cycle

A model test device, technology of expansion and contraction soil, applied in the field of geotechnical engineering, to achieve the effect of saving test costs

Inactive Publication Date: 2017-06-27
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] In order to solve the above problems, the patent of the present invention proposes a model test device and method for an expansion-contraction soil tunnel under the action of a dry-wet cycle. The development, expansion and final form of rock instability failure, reveal the stress state and deformation mode of tunnel support structure, and evaluate the advantages and disadvantages of tunnel construction technology and support measures

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  • Model test device and method for expansion-contraction soil tunnel under the action of dry-wet cycle
  • Model test device and method for expansion-contraction soil tunnel under the action of dry-wet cycle

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] It should be understood that the focus of this article is on the improvement of the authenticity and effectiveness of the research on the disaster-forming mechanism of the surrounding rock of expansive soil tunnels under the action of dry-wet cycles. Those skilled in the art can easily ascertain according to the relevant technology in the field.

[0032] Model test device for expansion-contraction soil tunnels under the action of dry-wet cycles, such as figure 1 , figure 2 As shown, it includes artificial rainfall and sunshine equipment, tunnel model device, water inlet and drainage equipment and real-time monitoring data acquisition system.

[0033] The artificial rainfall and sunshine equipment includes a water storage tank 1 and a rainfall pool 2 . The water storage tank 1 is used to store the total amount of precipitation calculated based...

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Abstract

The invention discloses a model test device and method for an expansion-contraction soil tunnel under the action of a dry-wet cycle. The device includes a tunnel model frame with an open upper part. There is a data acquisition device; the top of the tunnel model frame is provided with a rainfall and sunshine simulation device, and the rainfall and sunshine simulation device is a container with some water leakage holes at the bottom, and a detachable strong light is provided at the bottom of the container. The simulation of the dry-wet cycle of the surrounding rock of the tunnel is realized by utilizing the water leakage of the leak hole and the lighting of the strong light; the light intensity and light time of the strong light are controlled by a computer, so as to achieve the actual simulation engineering conditions.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a model test device and method for an expansion-contraction soil tunnel under the action of a dry-wet cycle. Background technique [0002] With the development and promotion of my country's highways, high-speed rail and other infrastructure to remote mountainous areas such as southwest my country, tunnel construction will inevitably encounter some special geological areas, such as expansive soil, loess and other expansion-contraction soils. During the construction process, due to the alternating occurrence of rainfall and sunshine in some areas, the surface of the tunnel and the excavation face are always in a dry-wet cycle state, which leads to large deformation and instability of the expansive soil surrounding rock, resulting in Construction problems such as fracture of the primary support structure and deformation of the support seriously affect the constructi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
Inventor 武科李术才张文吴昊天
Owner SHANDONG UNIV
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