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Device and method for testing swelling-shrinkage soil tunnel model under effect of dry-wet circles

A model test device and a technology for expanding and shrinking soil, which are applied in the field of geotechnical engineering to achieve the effect of saving test costs

Inactive Publication Date: 2016-01-13
SHANDONG UNIV
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  • Abstract
  • Description
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  • Application Information

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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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  • Device and method for testing swelling-shrinkage soil tunnel model under effect of dry-wet circles
  • Device and method for testing swelling-shrinkage soil tunnel model under effect of dry-wet circles

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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 device and method for testing a swelling-shrinkage soil tunnel model under the effect of dry-wet circles. The device comprises a tunnel model rack with an opened upper part, a tunnel model for simulating the actual project is arranged in the tunnel model rack, a data acquisition device is arranged in the tunnel model; the top part of the tunnel model rack is provided with a device (A) for simulating raining and sunshine, the device (A) is a container, whose bottom is provided with a plurality of holes and a detachable lamp that gives off strong lights; water can flow out from the holes, the lamp can give off lights, thus the device (A) can simulate the dry-wet circles on the surrounding rocks of a tunnel; moreover, the illumination intensity and illumination time of the lamp can be controlled by a computer so as to more precisely simulate the real 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 Applications(China)
IPC IPC(8): G01N33/00
Inventor 武科李术才张文吴昊天
Owner SHANDONG UNIV
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