Soil body two-dimensional fracture testing method and device

Abstract

The invention discloses a soil body two-dimensional fracture testing method and device. In the testing method, loading clamps are combined in different forms according to different fracture testing types; the loading clamps are installed on a power loading device according to required loading angles. Loading rods are connected with the external power loading device, and starting and loading modes of the loading rods are controlled by a computer and a data acquisition system. The testing device comprises a sample, a loading plate I and a loading plate II, wherein a loading clamp is formed by the loading plate I and the loading plate II which are completely identical. Each loading plate comprises a clamp body, a loading rod installing hole, a compression-shear assisting plate, a sample fixing hole, a sample clamping plate, a pull-shear assisting plate and the corresponding loading rod, and the compression-shear assisting plates and the pull-shear assisting plates are detachable. The testing device can simultaneously achieve compression-shear type '-I-II type', shear type 'II type', pull-shear type 'I-II type' and stretching type 'I type' fracture testing.

Description

technical field [0001] The invention relates to a soil fracture test device and method, belonging to the technical field of soil fracture tests, in particular to a soil tensile type, shear type, tensile and shear composite type, and compression and shear composite type failure A test method and a test device, in particular to a soil two-dimensional fracture test method and a test device. Background technique [0002] The failure of soil due to crack propagation is one of the important reasons for the failure of many geotechnical structures. Although the problem of soil fracture failure has been generally recognized by the academic and engineering circles, the research on soil fracture failure is still insufficient, and many key scientific problems have not yet been resolved. [0003] According to the stress on the crack and the displacement mode of the crack surface, the crack is divided into three basic types: type I (opening type), type II (shear type) and type III (tear ...

AI Technical Summary

Problems solved by technology

At the same time, even so, it is still difficult to obtain the relationship between the combined compressive shear force, soil sample strain and critical stress with a good continuous distribution characteristic in practice.

At present, fracture failure problems such as compression-shear type and tension-shear type require independent research on different test devices, which is not convenient for comparative research among various types of fracture problems

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