Intelligent NC super high pressure true 3D uneven loading and unloading and pressure stabilizing model test system

Abstract

The invention discloses an intelligent NC super high pressure true 3D uneven loading and unloading and pressure stabilizing model test system. The system includes a combined rack reaction device, a super high pressure true 3D uneven loading and unloading device, an intelligent hydraulic pressure unloading and pressure stabilizing NC system, a model displacement automatic test system and a high-definition multi-probe peeping system. The super high pressure true 3D uneven loading and unloading device is arranged in the combined rack reaction device for performing super high pressure true 3D uneven loading and unloading on a test model. The intelligent hydraulic pressure unloading and pressure stabilizing NC system is connected with the super high pressure true 3D uneven loading and unloadingdevice through a high pressure oil pipe. Through input commands of the intelligent hydraulic pressure unloading and pressure stabilizing NC system, digital servo control of the super high pressure true 3D uneven loading and unloading device for super high pressure true 3D gradient uneven loading and unloading and pressure stabilization control is realized. The model displacement automatic test system collects displacement of any parts in the model automatically. The high-definition multi-probe peeping system observes a tunnel digging, deforming and destruction processes dynamically in real time. The system has advantages of large and adjustable size of the reaction device, servo control of loading, large loading volume, high loading precision, good pressure stabilizing performance, unevenloading and the like. The scale and the performance are innovative home and abroad and non-continuous deformation and destruction processes of deep tunnel digging in a complex environmental conditions can be simulated and accurate information of multi-physical field evolution such as tunnel surrounding rock displacement, stress, strain and the like of tunnels can be acquired through automatic testing. The system has significant application prospects in simulating nonlinear deformation and destruction mechanisms of deep underground projects including energy, traffic, hydro-power and mine and the like.

Description

technical field [0001] The invention relates to an intelligent numerical control ultra-high voltage true three-dimensional non-uniform loading and unloading and voltage stabilization model test system used in the fields of hydropower, transportation, energy, mining, national defense and other deep underground cavern projects. Background technique [0002] With the rapid development of the global economy, the mineral resources in the shallow part of the earth are gradually exhausted, and the development of resources continues to move to the deep part of the earth. At the same time, the needs of human survival and development and the exploration of the unknown world are constantly expanding the underground space. At present, many underground projects under construction and about to be built in China continue to go deep, such as traffic tunnels, mine roadways, hydroelectric caverns, oil and gas storage depots, etc., are gradually developing to a depth of kilometers or thousands ...

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Problems solved by technology

[0003] (1) "International Journal of Rock Mechanics and Mining Sciences" No. 44, 2007 introduced a three-dimensional model test system for simulating mine mining, but it cannot implement true three-dimensional non-uniform loading and unloading

[0004] (2) "Tunnelling and Underground Space Technology" No. 23, 2008 introduced a geomechanical model test system for simulating the construction of sandy soil pipe sheds. This system can only implement self-weight stress loading, and cannot realize true three-dimensional non-uniform loading and unloading

[0005] (3) "International Journal of Engineering Geology" No. 121, 2011 introduced a PFESA (Physically Finite Elemental Slab Assemblage) model test system, which can only carry out uniform loading of plane stress, and cannot realize true three-dimensional non-uniform loading and unloading

[0006] (4) "International Journal of Rock Mechanics & Mining Sciences" No. 48, 2011 introduced a quasi-three-dimensional geomechanics model test system. The maximum working pressure on one side of the system is 300KN, which can simulate the plane strain state, but cannot realize true three-dimensional non-uniform loading. uninstall

[0007] (5) "Tunnelling and Underground Space Technology" No. 50, 2015 introduced a plane stress test device, which can only be loaded vertically with its own weight, and cannot realize true three-dimensional non-uniform loading and unloading

[0008] (6) "International Journal of Engineering Geology" 2015 Issue 197 introduced a model test system. The system applies air pressure through the built-in airbag in the model body, and adopts passive constraints around the model body, which cannot realize true three-dimensional non-uniform loading and unloading

[0009] (7) "Journal of Wuhan Hydraulic and Electric University" No. 5, 1992 introduced a plane stress loading system. The air pump controls the pressure to load or unload step by step. This system can only carry out plane loading and cannot realize true three-dimensional non-uniform loading and unloading.

[0014] 1) The size of the loading reaction device of the model test system is fixed and cannot be adjusted arbitrarily according to the range of the test model;

[0015] 2) Most of the model test systems are flat, quasi-three-dimensional, small-sized and uniformly loaded, and cannot implement the true three-dimensional non-uniform loading and unloading process;

[0016] 3) The loading value of the model test system is small, and it is impossible to truly simulate the high stress distribution state of deep rock mass through ultra-high pressure loading;

[0017] 4) The model test system cannot automatically collect the displacement of any part inside the model

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