Experimental device for monitoring pore water pressure and transverse permeability based on uniaxial testing machine

Abstract

The embodiment of the invention provides an experimental device for monitoring pore water pressure and transverse permeability based on a uniaxial testing machine, which comprises an upper loading disc provided with a first channel; the pressure sensor is arranged at the top of the upper loading disc; the lower bearing disc is provided with a second channel and a third channel, and the second channel is communicated with the third channel; the test sample piece is provided with a fourth channel, the top of the test sample piece abuts against the bottom of the upper loading disc, the bottom of the test sample piece abuts against the top of the lower loading disc, the first channel is communicated with the fourth channel, and the second channel is communicated with the fourth channel; the lower bearing disc is placed in the tray; and the port device comprises a water guide pipe, a valve and a pressure gauge. According to the invention, the measurement of the transverse permeability and the pore water pressure is simplified, and the measurement accuracy can be improved.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering test devices, in particular to an experimental device for monitoring pore water pressure and lateral permeability based on a uniaxial testing machine. Background technique [0002] With the intensification of social transformation activities, more and more geotechnical problems need to be solved urgently. At present, a variety of physical experimental devices have been developed for geotechnical engineering problems, which can be used to investigate the changes in physical properties of various rocks under different stress states and the dynamic expansion process of cracks, including measurement devices for pore water pressure and permeability, The changes of pore water pressure and permeability under different stresses will have a great influence on the construction of geotechnical engineering. [0003] In the existing related art, most of the physical experimental devices used ...

AI Technical Summary

Problems solved by technology

[0003] In the existing related technologies, most of the physical experimental devices used to measure pore water pressure and permeability are independent, and most of them are realized under the stress loading of the triaxial experimental machine. The experimental device has high requirements on the performance of the experimental machine. The operation is cumbersome, the test sample is large, and the sealing is poor, it is easy to leak, and it is difficult to obtain the accurate pore water pressure value of the inner hole of the sample

In addition, most of the existing experimental devices for testing permeability are relatively complicated, and they all focus on the vertical permeability test under the pressure state of the sample, lacking the circumferential or transverse permeability test

If you need to solve the sample permeability under a certain stress state, you need to suspend the current experiment, which will easily lead to inaccurate test results

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