Model test device and test method for measuring soil body displacement under action of in-situ stress filed

Abstract

The invention provides a model test device and test method for measuring soil body displacement under the action of an in-situ stress field. The model test device comprises a transparent model box, a permeable layer, a pore pressure measuring device, a pressure water providing device and a sealing cover plate. The opening position is sealed by the sealing cover plate, a water draining hole is formed in a water draining cavity, a pressure measuring hole is formed in the lateral wall of a soil sample containing cavity, the pore pressure measuring device is arranged in the pressure measuring hole, the pore pressure measuring is in liquid sealing fit with the pressure measuring hole, the sealing cover plate is provided with a water inlet pipe, the pressure water providing device is connected with the water inlet pipe for communicating with the soil sample containing cavity, and the pressure water providing device is communicated with the water draining hole to form a water circulating system. The model test device for measuring the soil body displacement under the action of the in-situ stress field has the advantages of being simple in structure, convenient to operate and low in equipment cost.

Description

technical field [0001] The invention relates to the field of rock engineering, in particular to a model test device and a test method for measuring soil displacement under the action of an in-situ stress field. Background technique [0002] The particle image velocimetry technology was first applied in fluid mechanics. By irradiating the fluid section with laser light, the photos before and after the flow of the tracer particles on the section are obtained. Through the image matching technology, the flow velocity of the tracer particles is measured to obtain the flow velocity of the fluid. Due to the advantages of non-interference, dynamic and global observation, the application of particle image velocimetry technology has developed from fluid mechanics to biology, aerodynamics, geotechnical engineering and other disciplines. [0003] Since the particle image velocimetry technology uses image correlation processing technology to segment images before and after deformation an...

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Problems solved by technology

[0005] In order to solve the problems of complex structure, inconvenient operation and high equipment cost in the prior art, the present invention provides a model test device for measuring soil displacement under the action of in-situ stress field

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