Large-size freely combined model test device for high ground stress underground engineering

Abstract

The invention relates to a large-size freely combined model test device for a high ground stress underground engineering, and the device provided by the invention comprises a plurality of split mounting type counter-force jack horse devices, wherein the whole test device has a narrower upper part and a wider lower part; the side face of the whole test device is a slope; each split mounting type counter-force jack horse device comprises a top beam, a side beam and a bottom beam; flanges and high-strength bolts are used for connecting the top beam to the side beam and connecting the side beam to the bottom beam; the counter-force jack horse devices can be connected mutually or be connected to front and back counter-force beams; the upper parts of the front and back counter-force beams are connected to left and right pulling rods while the lower parts of the front and back counter-force beams are connected to a model lifting translation trailer system on the bottom beam; the top beam andthe side beam are both provided with hydraulic loading systems; and the baseboard of the device is provided with an automatic hydraulic model lifting translation trailer system, thereby being convenient and stable to move a test model in and out. The test device is flexibly assembled, is simply operated, can be used for conveniently loading and observing, is provided with the model lifting translation trailer system, and can be applied to the plane and three-dimensional geo-mechanical model test for the geotechnical engineering under the high ground stress condition.

Description

technical field [0001] The invention relates to a geotechnical engineering model test device, in particular to a large-scale freely combined high-stress underground engineering model test device. Background technique [0002] At present, the geomechanics model test is conducive to highlighting the main contradiction in the complex test process, and it is easy to grasp and discover the inner relationship of the phenomenon. Abroad, experts headed by Furman Green created the engineering geomechanics model test technology in the Italian Structural Model Test Institute. Subsequently, countries such as the United States, Germany, France, the United Kingdom, and Japan also carried out a large number of model test studies. In China, Tsinghua University, the Third Research Institute of the General Staff Corps of Engineering, Wuhan University, Shandong University and many other scientific research institutes have successively carried out geomechanical model test research on many larg...

AI Technical Summary

Problems solved by technology

[0016] 1. The size of the model device is generally not adjustable, and the adjustable operation is relatively cumbersome. There is no model device that can be combined freely

[0017] 2. The existing model test device is limited by stiffness, strength and model space size, it is difficult to realize large-scale model test research on plane or three-dimensional underground caverns under the condition of large buried depth and high ground stress

[0018] 3. The cracking phenomenon and development process of the surrounding rock cannot be observed conveniently and intuitively during the test

[0019] 4. After the loading is completed, the model cannot be conveniently and completely transferred out of the model frame, and the model cannot be dissected conveniently, which is not conducive to observing the internal shape of the model after loading and damage

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