Novel column shear permeation testing device and testing method thereof

Abstract

The invention relates to a novel column shear permeation testing device and a testing method thereof, and belongs to the technical field of earth-rock dam seepage test devices. The testing device comprises a driving base, a pipeline base, a sample assembly, an axial force system, and a pressure chamber. The sample assembly comprises a sample base, a core wall clay sample, an upstream material sample, a downstream material sample, and a cross shear column. The axial force system comprises an axial force rod, an axial force sensor, an actuator, and a reaction force bracket. The sample top cap iscoaxially arranged at the upper end of the sample assembly. The driving base, the pipeline base, the axial force rod and the pressure chamber form an enclosed space to seal the sample assembly. According to the novel column shear permeation testing device and the testing method thereof, the sample preparation efficiency is high, and the use cost is low; the influence of the combination of the shearing surface generated by the inner column shearing of the clay sample and the upstream and downstream material samples on the permeability characteristics of the sample under different triaxial stress conditions can be researched; and more extensive research can be conducted by researchers to assist in the in-depth research of the seepage prevention theory of earth-rock dams.

Description

technical field [0001] The invention relates to the technical field of a dam core wall clay seepage test device, in particular to a novel column shear seepage test device and a test method thereof. Background technique [0002] The clay of the core wall of a high earth-rock dam is prone to large shear deformation at the part in contact with the bank slope, thus forming a shear surface. The main cause of infiltration accidents. [0003] The traditional seepage test device puts the soil sample under the confinement or triaxial stress state, and cannot measure the permeability characteristics and seepage failure gradient of the soil under large shear deformation. Chinese patent (CN 104142277 B) discloses a device and a test method for measuring the variation of soil permeability coefficient under torsional shear conditions; The ring shear seepage test device is used to study the seepage characteristics of the shear surface of the soil or the interface between the soil and the...

AI Technical Summary

Problems solved by technology

[0010] In view of this, the purpose of the present invention is to provide a novel column shear penetration testing device and testing method thereof, which solves the problem that the prior art sample preparation process and test process cannot be separated, confining pressure cannot be applied, and the design does not meet the requirements of geotechnical test specifications and parts. Processing complex problems

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