Water-heat-force coupling testing system for large-scale high-pressure soil mass freeze thawing process

A test system and large-scale technology, applied in the direction of soil material testing, material inspection products, etc., to achieve the effect of small lateral deformation, meet the load-bearing and stability requirements, and increase thermal insulation

Inactive Publication Date: 2013-05-22
CHINA UNIV OF MINING & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to overcome the shortcomings and deficiencies of existing soil freeze-thaw test devices, and provides a test system that can satisfy the research of water-heat-mechanical coupling in deep s...

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  • Water-heat-force coupling testing system for large-scale high-pressure soil mass freeze thawing process
  • Water-heat-force coupling testing system for large-scale high-pressure soil mass freeze thawing process

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Embodiment Construction

[0022] In the accompanying drawings, the large-scale high-pressure soil freeze-thaw process water-heat-mechanical coupling test system includes a test bench, a loading system connected to the test bench, a temperature control system, a water replenishment system and a data acquisition system; The test bench includes a high-strength cast steel circular tube sample cylinder 13 capable of accommodating large-scale soil samples. The two ends of the sample cylinder 13 are provided with flanges, and the periphery of both ends is respectively equipped with reinforcements to reduce the stress at the end. The rib plate 30 and the effective space inside the sample cylinder 13 have a size of Φ500mm×1000mm, which can withstand a maximum internal pressure of 15MPa; the flange of the sample cylinder 13 and the edge of the base 20 are provided with screw holes correspondingly, and the base 20 is connected by bolts to the bottom. Flange connection; the base 20 is a circular thick steel plate, ...

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Abstract

The invention relates to a water-heat-force coupling testing system for a large-scale high-pressure soil mass freeze thawing process. The system comprises a test bench, and a loading system, a temperature control system, a water charging system and a data acquisition system which are connected with the test bench. A test bench main body is a sampling barrel, can bear the maximum internal pressure of 15MPa and can contain a maximum sample of phi 500mm*1000mm. The loading system is arranged on the upper part of the test bench, the water charging system is arranged on the bottom of the test bench, and a sensor is buried in a soil mass and can acquire internal temperature, water and stress information of the soil mass. The temperature control system consists of a top plate, a barrel body, a bottom temperature control tube, a thermal insulation layer and a high and low temperature thermostatic bath and has a good temperature control effect. By virtue of the system, freeze thawing tests can be performed on large-scale samples according to a high-pressure solidification-loading freezing path, a dynamic water-heat-force coupling function in a freeze thawing process can be directly understood, and a deep soil mass freeze thawing process can be stimulated more truly, so that support is provided for water-heat-force coupling researches in the technical field of artificial deep stratum freezing.

Description

technical field [0001] The invention discloses a water-heat-mechanical coupling test system for large-scale high-pressure soil freezing and thawing. The test system can conduct multiple freeze-thaw tests on large-scale samples according to the high-pressure consolidation-loaded freezing path. And it can automatically acquire and store temperature, moisture and stress information in real time, and is especially suitable for research on the water-heat-mechanical coupling effect of deep soil freeze-thaw process in the technical field of artificially frozen strata with a thickness of 400-800m. Background technique [0002] In the field of artificial strata freezing technology, with the increase in the depth of resource exploitation, some basic problems of frozen soil mechanics involved in the 400-800m thick topsoil freezing technology in the central and eastern regions of my country have attracted increasing attention, such as the water-heat- force coupling problem. An in-depth ...

Claims

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Application Information

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IPC IPC(8): G01N33/24
Inventor 李海鹏胡琛琛宋雷汪汝锋张涛任彦龙杨志江
Owner CHINA UNIV OF MINING & TECH
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