Contact surface displacement testing device

Abstract

The invention relates to a contact surface displacement testing device. The device includes a carrier; a test cavity penetrating through the upper surface and the lower surface of the carrier is formed in the carrier; a horizontally arranged directional shaft is arranged in the test cavity; a linear bearing is arranged on the directional shaft in a sleeving manner; a transmission body is fixedly arranged on the linear bearing; the top of the transmission body extends upwards out of the top opening of the test cavity and then is fixedly connected with a measurement displacement insertion piece;the bottom of the transmission body extends downwards out of the bottom opening of the test cavity; and a displacement sensor used for detecting the displacement of the bottom of the transmission body is fixedly arranged at the bottom of the transmission body. The device has the following beneficial effects: the displacement is measured according to the movement of the displacement measuring insertion piece, so that the shearing displacement of each point on a structural surface is measured, and the contact surface failure mechanisms of different types of materials are understood more deeply.The device lays a foundation for indoor soil-rock interface landslide model experiments and the distribution condition of displacement on the section of a large direct shear experiment.

Description

technical field [0001] The invention relates to the technical field of civil engineering experiment equipment, in particular to a large-scale direct shear experiment of soil body and a local point displacement test on a shear surface of a model test, in particular to a contact surface displacement test device. Background technique [0002] Geotechnical testing is an important content in geotechnical engineering. The irreplaceable role of geotechnical testing is as follows: 1. Only through testing can the general and specific mechanical properties of soil as a fragmented multiphase geological material be revealed; 2. Only by testing Specific soil sample tests can reveal different mechanical properties of soils with different internal shapes, different origins, and different states, especially for unsaturated soils, regional soils, artificial composite soils, etc.; 3. Tests are used to determine various theoretical and engineering parameters. Basic means; 4. Tests are the main...

AI Technical Summary

Problems solved by technology

Generally speaking, in recent decades, as a classic soil displacement measurement method, there has not been much change, and it is a pity that the deep sliding surface displacement in model experiments cannot be measured with existing instruments. A large number of scholars have studied structural surface displacement. A variety of mathematical models have been proposed for the stress-strain distribution on the surface, but they are all theoretically derived results. The experimental measurement shows that there are almost no shear displacement values ​​at local points on the structural surface. The reason is that there is no measurement of the deep sliding surface. Shear Displacement Devices

Images