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Model test system for mechanical properties of unsaturated soil

A technology of mechanical properties and model testing, which is applied in the field of model testing system of unsaturated soil mechanical properties, can solve the problems of shear strength, triaxial stress, and strain engineering guidance are not strong, boundary effects have great influence on test results, and frequent Hundreds of thousands to millions of dollars and other problems, to achieve the effect of solving the inaccurate acquisition of multiple parameters, overcoming time-consuming, and real-time transmission

Pending Publication Date: 2020-06-30
中国人民解放军军事科学院国防工程研究院工程防护研究所
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Problems solved by technology

[0002] At present, there are unsaturated soil direct shear testers, unsaturated soil consolidation testers, unsaturated soil triaxial testers and other test devices in the laboratory for studying the strength and deformation characteristics of unsaturated soil. Due to the small size of the sample, the boundary effect The test results have a great influence, and the measured shear strength, triaxial stress, and strain are not very instructive for engineering. The experimental device for water and air permeability characteristics of unsaturated soil is in the stage of exploration and development, and there is no recognized finalized product yet.
Field tests on unsaturated soil can reflect the actual situation, but a field test costs hundreds of thousands to millions of dollars and lasts for several months. General engineering projects and scientific research project funds cannot afford high field test costs

Method used

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  • Model test system for mechanical properties of unsaturated soil
  • Model test system for mechanical properties of unsaturated soil

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Embodiment Construction

[0022] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 , 2 As shown, a model test system for the mechanical properties of unsaturated soil includes a model box, a loading device and a measuring device. The model box includes a box body 1 and a box cover 3. The length, width, and height of the box body are respectively: 2000mm, 300mm, 1500mm, the box cover 3 is set on the upper port of the box body 1, the connection between the box cover 3 and the box body 1 is provided with a rolling diaphragm and a seal, the seal is preferably a rubber gasket, on the front side of the box body 1 There are two observation windows 8 on the top, the horizontal interval between the two observation windows is 600mm, the width of the observation windows is 100mm, and the height of the observation windows is the same as the height of the box; the loading device include...

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Abstract

The invention discloses a model test system for mechanical properties of unsaturated soil. The system comprises a model box, a loading device and a measuring device, the model box comprises a box bodyand a box cover, the box cover covers an upper port of the box body, a rolling diaphragm and a sealing piece are arranged at the joint of the box cover and the box body, two observation windows are arranged on one side face of the box body, the horizontal interval between the two observation windows is 600 mm, the width of each observation window is 100 mm, and the height of each observation window is the same as that of the box body; according to the invention, vertical load loading is carried out on the soil sample in the box body through the loading device, then data acquisition is carriedout through the measuring device, the operation is simple, the principle is clear, and the strength, strain, water seepage and gas seepage characteristics and change rules of the soil body under theinfluence of multiple working conditions, multiple engineering backgrounds and multiple factors can be simulated.

Description

technical field [0001] The invention belongs to a test device for simulating the mechanical properties of unsaturated soil, in particular to a model test system for the mechanical properties of unsaturated soil. Background technique [0002] At present, there are unsaturated soil direct shear testers, unsaturated soil consolidation testers, unsaturated soil triaxial testers and other test devices in the laboratory for studying the strength and deformation characteristics of unsaturated soil. Due to the small size of the sample, the boundary effect The test results have a great influence, and the measured shear strength, triaxial stress, and strain are not very instructive for engineering. The experimental device for water and air permeability of unsaturated soil is in the stage of exploration and development, and there is no recognized finalized product yet. Unsaturated soil field tests can reflect the actual situation, but a field test costs hundreds of thousands to million...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12G01N3/02G01N15/08
CPCG01N3/02G01N3/12G01N15/082G01N15/0826
Inventor 苗强强王励自刘国军孔福利
Owner 中国人民解放军军事科学院国防工程研究院工程防护研究所
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