A simple device for shear rheometer

Abstract

The invention relates to the field of an experimental and test instrument of a geotechnical engineering geotechnical material, and relates to a simple device of a shear rheometer. The simple device comprises an experimental platform, a loading system and a force measuring ring. A hand wheel is rotated, so that two slopes in the experimental platform rise in proportion along a guide rod, a shear force is enabled to be parallel to a bottom slope of a soil sample, the slope shear is realized, different shear inclination angles are simulated, and a shear plane of the geotextile material with weakest shear strength can be obtained. A flexible wire rope bypassing a fixed pulley is loaded by a weight in the loading system during the shearing loading, thus the load precision can be guaranteed, so that a load is a stable value, operation steps are simple, the test precision is high, an accurate and reliable shear strength index can be effectively provided, the inclination angle of the soil sample can be adjusted, a stable shear stress can be provided, and the obtained shear strength index is precise.

Description

technical field [0001] The invention relates to a testing instrument for geotechnical material testing in geotechnical engineering, in particular to a simple device for a shear rheometer. Background technique [0002] Under the influence of external force and engineering environment, most rock and soil materials have time-related mechanical behavior. If they are affected by other external factors at the same time, it will lead to changes in the rheological deformation path of the soil and acceleration of deformation, and eventually landslides and other projects will occur. Disasters have brought great harm to human production and life. Therefore, in-depth study of the properties and laws of rock and soil materials has always been an important applied research in the field of rock and soil mechanics. [0003] The shear strength of soil is one of the important indicators to study the strength characteristics of soil, and it is the most important mechanical property index rela...

AI Technical Summary

Problems solved by technology

The shear strength index of soil is obtained through laboratory tests, the main methods are direct shear test and triaxial shear test, but in the direct shear test, the shear plane is pre-designated, objectively, the shear plane is not the shear resistance of the sample. The weakest shear plane, so the resulting shear strength index is inaccurate

The shear plane of the triaxial shear test is not fixed. The shear plane is the surface with the weakest shear resistance of the sample. The shear stress and shear strain are evenly distributed, and the drainage test results can be strictly controlled to be closer to the actual theory of the soil sample. value, but the operation of the triaxial shear test is complex and requires more samples

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