A hypergravity simulation system for deep engineering in-situ stress field and seepage field

Abstract

The invention discloses a deep engineering in-situ stress field and seepage field hypergravity simulation system, which includes: a triaxial pressure chamber for placing models and providing in-situ axial pressure, confining pressure and the location of deep structures. Seepage field; analog control device, used to provide pressurized liquid and pore water to the triaxial pressure chamber to generate the aforementioned axial pressure, confining pressure and seepage field, and control the magnitude of axial pressure, confining pressure and seepage field; signal acquisition device, Used to monitor model deformation and seepage processes during testing. The invention improves the similarity, reliability and accuracy of the simulation test, and can output pressure with an accuracy of 1% to the triaxial pressure chamber or form a pore water pressure difference with an accuracy of 1% through the command of the control unit.

Description

technical field [0001] The invention relates to a physical simulation test system in the field of geotechnical engineering, in particular to an in-situ stress field and seepage field hypergravity simulation system for deep ground engineering. Background technique [0002] Deep earth engineering refers to the engineering process that occurs during the construction and operation of deep structures in the deep environment. Common deep structures can be deep repositories, geothermal engineering, natural gas storage in caverns, etc. [0003] Among them, the deep earth environment (deep earth environment) refers to the environment at a depth of more than 100 meters from the surface. [0004] The in-situ stress field and seepage field of deep structures have the following five characteristics at the same time: (1) The overburden pressure (axial pressure) on deep structures is relatively large, which can reach 20 MPa at a depth of one kilometer; (2) The confining pressure on the d...

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Problems solved by technology

[0016] In order to overcome the shortcomings of the limited simulation time scale and the inability to completely restore the in-situ stress field and seepage field in the prior art, the purpose of the present invention is to provide a deep engineering in-situ stress field and seepage field hypergravity simulation system, which can simulate The test provides high confining pressure and high stress at the same time, and can simulate the in-situ confining pressure and self-weight stress gradient to truly restore the in-situ stress field and seepage field of deep structures, so that the test results can reflect the prototype more reliably and accurately Happening

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