Geomechanical magnetic field testing device and method

Abstract

The invention relates to a magnetic field testing device and method. The testing device provided by the invention comprises a control power supply and a host which is connected with the control power supply, wherein the host comprises a cabinet; the inner wall of the cabinet is provided with a shielding layer; a support is arranged on the base of the cabinet; the support is connected with a framework; a coil winding is arranged on the framework; the outer side of the framework is provided with an insulating layer; and a cooling fan is arranged below the base of the cabinet. In the invention, the simulation of the actual physical and mechanical properties of geomechanics is realized based on the principles of simulating gravity by utilizing an electromagnetic force and simulating a gravityfield by utilizing an electromagnetic force field. A powdery magnetic material is blended into rock soil so that the magnetic force action on the rock soil in the magnetic field is overlapped on the original gravity, thereby achieving the effect of simulating the ng gravity field, improving the stress level of a model test material, and providing basic equipment for the magnetic force model test of the geomechanics.

Description

technical field [0001] The invention relates to a geomechanical magnetic field test device and a test method, belonging to the field of geomechanics. Background technique [0002] Model test has always been an important research method in geotechnical engineering. It can be used not only to test the results of various theoretical analysis and numerical calculations, but also to directly guide the design and construction of actual projects. [0003] The existing model tests are divided into two categories: one is the model test under 1g. In the usual gravity field, the geotechnical building or foundation is simulated under certain boundary conditions, and the relevant stress and strain data are measured. Theoretical calculation or data calculation to test the theoretical calculation results. This test is divided into small scale test and full scale test. Due to the low stress level and the difficulty in satisfying the similarity of the strength index in the small-scale test...

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Problems solved by technology

However, there are many defects in the geotechnical centrifugal model test. First, the centrifugal inertial force field and the gravity field cannot be completely similar. The centrifugal inertial force field is proportional to the inertial radius. The geotechnical centrifugal model test cannot obtain a uniform force field, which is quite different from the actual engineering; secondly, the Coriolis acceleration generated during the feeding process will also cause errors in the centrifugal model; finally, acceleration and braking are also one of the problems of the centrifugal model test. one

It takes a certain amount of time to increase and decrease the rotation

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