Shear test device for observing mechanical property of interface between underwater soil and structure

Abstract

The invention relates to a mechanical property test device, in particular to a test device for observing the mechanical property of an interface between underwater soil and a structure, which is especially suitable for researching the mechanical property of the interface between the underwater soil and the structure in a hydraulic building (structure). The test device comprises a fixing mechanism, a horizontal movement mechanism, a soil box and a loading system, and an electro-hydraulic servo movable and static universal testing machine is used as a main machine frame. A designed soil material is loaded in the soil box fixed on the horizontal movement mechanism. A structure test block is arranged on an upper chuck of the electro-hydraulic servo movable and static universal testing machine, a normal stress is applied through the vertical loading system, and the shear mechanical behavior of the interface between the underwater soil and the structure under normal stress and complex stress paths can be represented through the horizontal loading system. The normal force and the shear force in the interfere shear test are measured through a load sensor, a vertical displacement meter arranged on the top surface of the structure test sample is used for measuring the normal displacement of the interface in the test, and horizontal displacement meters arranged on two sides of the soil box are used for measuring the shear displacement in the test.

Description

technical field [0001] The invention relates to a mechanical characteristic testing device, in particular a shearing test device for observing the mechanical characteristic of the underwater soil and the structure interface, which is suitable for studying the mechanical characteristic of the interface between the underwater soil and the structure in the hydraulic construction (structure). Background technique [0002] The current research on soil-structure interaction is mainly to study the basic mechanical properties of the soil-structure interface under corresponding conditions through physical tests, and to establish a constitutive model describing the mechanical properties of the interface on the basis of the test or to carry out an existing model. Improve accordingly. Therefore, the test equipment used is very important. Many scholars at home and abroad have studied the test instruments for soil-structure interface properties. At present, the widely used instruments in...

AI Technical Summary

Problems solved by technology

For hydraulic structures, the interface between the soil and the structure is always under the condition of immersion, and the current test equipment is difficult to simulate the actual mechanical behavior of the interface between the soil and the structure under the condition of immersion

The sample size of the conventional interface shear instrument is small, and the mechanical response of the interface under the complex stress path cannot be realized

These defects limit the study of the mechanical properties of the soil-hydraulic structure interface.

Images