Test system and method for directly measuring interface shear strength at different temperatures

Abstract

The invention discloses a test system and method for directly measuring interface shear strength at different temperatures, and belongs to the technical field of research on rock soil, geology, environment and the like. Aiming at the problems of insufficient precision, poor anti-interference capability, limited measurement parameters and the like of the existing direct shear test technology, the invention provides a test system and method for directly measuring the interface shear strength at different temperatures. The device provided by the invention mainly comprises a lower shearing box-measuring device, a constant-temperature water bath tank, a heating and refrigerating circulator and a loading device, and a tension and compression stress sensor and a pore water pressure sensor are used as internal high-precision measuring components of a structure; a method for testing and calculating the properties of the structure-soil interface at different temperatures and roughness is provided, and the interface strength and pore water pressure of the structure-soil interface can be measured by using the method. The relationship between the cohesive force and the friction angle of the structure-soil interface and the temperature, the roughness and the shearing rate can be obtained through calculation and analysis.

Description

technical field [0001] The invention belongs to the research fields of rock soil, geology and environment, and relates to a test system and method for directly measuring interface shear strength at different temperatures. Background technique [0002] The structural foundation of marine engineering will inevitably have complex interactions with the seabed soil during installation and service. The problem of structure-soil interface is common in geotechnical engineering. Due to the large shear stress on the structure-soil interface, discontinuous deformation phenomena such as local disengagement, dislocation, and sliding will occur on the contact surface, which seriously affects the bearing capacity of the structure. stability. Therefore, it is very important to accurately grasp the properties of the structure-soil interface for the stability and safety of marine engineering structures. [0003] As an indoor test method, the direct shear test can obtain the shear strength, ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a test system and method for directly measuring interfacial shear strength at different temperatures, so as to overcome the deficiencies of existing means

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