Three-axis infiltration experiment device

Abstract

The invention provides a triaxial permeability testing device, belonging to the field of testing technique of soil mechanic property, in particular relates to a triaxial permeability testing device which is used for measuring the permeability characteristic of the soil under different stress and strain conditions; the technical proposal is that the shape of a base and a top cap is reconstructed on the basis of a triaxial shear instrument; water inlet holes and water inlet pipelines are added on the base during the permeability process in three directions; water outlet holes and water outlet pipelines are added on the top cap during the permeability process in three directions; the specimen generates shear deformation by surrounding pressure and an axial pressure system; the permeability of the specimen under different shear deformation conditions in any one direction out of the three directions is achieved by changing the connecting and closing type of the water inlet pipeline and the water outlet pipeline and applying the permeability pressure on the specimen by the water pressure system. The shaped of the improved base and top cap is beneficial for arranging water inlet pipelines and water outlet pipelines and facilitates achieving the permeability test in any one direction out of the three directions; and the shifting operation of the connecting type of the water flow pipelines of different permeability directions is simple and the control is convenient.

Description

technical field [0001] The triaxial penetration test device belongs to the technical field of testing the mechanical properties of soil, and in particular relates to measuring the seepage properties of soil under different stress states and deformation conditions. Background technique [0002] At the connection between soil and structure, the soil often produces complex mechanical deformation and seepage interaction under the action of water and other various loads, which may endanger the safety of geotechnical structures. For example, the contact between the core wall and the bank slope of a high earth-rock dam is one of the dangerous parts where shear cracks and large shear deformation may occur. Conditions are an important cause of accidents. Therefore, the study of permeability and seepage stability under the condition of soil shear deformation has important engineering practical value, which is related to whether the design and safety evaluation of geotechnical structu...

AI Technical Summary

Problems solved by technology

The traditional triaxial shear test and penetration test can only measure the stress-deformation characteristics or permeability characteristics of the soil unilaterally, and have insufficient ability to measure the permeability characteristics of the soil under shear deformation conditions.

The existing triaxial permeability test method can only measure the permeability characteristics of the sample under the condition of consolidation without shear deformation, and the sample is cylindrical, and can only measure the permeability characteristics of the sample along the axial direction

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