Device for testing model with three-dimensional gradient nonuniform loading structure

Abstract

The invention relates to a device for testing a model with a three-dimensional gradient nonuniform loading structure, which comprises a table-shaped gradient nonuniform loading device and an opposite force loading device, wherein the opposite force loading device is connected with the table-shaped gradient nonuniform loading device which is arranged in the opposite force loading device; and a table-shaped gradient loading module of the table-shaped gradient nonuniform loading device is tightly attached to the surface of a testing model. Because the deep underground chamber engineering in the fields of hydroelectric power, traffics, power sources, resources and defense construction usually lies in three-dimensional loading states which are nonuniformly distributed in a gradient, the table-shaped gradient loading module is arranged on the surface of the model, thus the model testing device achieves the three-dimensional gradient nonuniform loading of an underground structure model and more truly discloses the nonlinear deformation characteristics and failure mechanisms of wall rocks of the deep underground chamber through the testing of the three-dimensional gradient nonuniform loading structure model so as to more reasonably evaluate the stability of the wall rocks of the underground chamber and take effective reinforcement measures, thereby having a quite important significance to guiding the design and the construction of the deep underground engineering and guaranteeing the safety of the deep underground engineering.

Description

technical field [0001] The invention relates to a model test device, in particular to a three-dimensional gradient non-uniform loading structural model test device used in deep underground engineering geomechanics model tests in the fields of hydropower, transportation, energy, resources and national defense engineering. Background technique [0002] In the deep underground engineering in the fields of hydropower, transportation, energy, and resources, with the increase of burial depth, the structure, mechanical properties and engineering response of the surrounding rock in the deep cavern are subject to zonal rupture, A series of new characteristic scientific phenomena, such as large deformation and impact failure, are significantly different from the engineering response of shallow caverns. Therefore, the problems of deep rock mass engineering have aroused great interest from experts and scholars in the field of rock mechanics and engineering in the world. Attention has be...

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Problems solved by technology

However, the test frame can only be loaded uniformly, and the model cannot be loaded non-uniformly with three-dimensional gradients.

[0008] (4) "Journal of Rock Mechanics and Engineering" No. 21, 2004 introduced a plane strain roadway model test rig. The model size is 1m×1m×0.2m, and it is arranged vertically. The test rig can only be loaded uniformly and cannot Carry out non-uniform loading of the three-dimensional gradient of the model

The system can only be used for uniform loading, but cannot be used for non-uniform loading of the three-dimensional gradient of the model

[0010] (6) "Journal of Civil Engineering" No. 12 in 2005, and the Chinese patent application number 200510045291.7 introduced a new type of rock and soil geomechanics model test system, which has the advantages of adjustable size, large scale and flexible assembly. However, the system can only perform quasi-three-dimensional loading, and cannot perform non-uniform three-dimensional loading of model gradients.

The system can only carry out three-dimensional loading of uniformly distributed loads, but cannot carry out three-dimensional loading of gradient non-uniformly distributed loads

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