Soil body tensile test device and soil body tensile test method

Abstract

The invention provides a soil body tensile test device and a soil body tensile test method, and belongs to the technical field of slope strength research, the soil body tensile test device comprises: a counterforce frame having a top plate and a bottom plate opposite to each other; a loading assembly which is matched with the top plate; a stress sensor which is connected with one end, close to the bottom plate, of the loading assembly; a displacement sensor which is arranged on the end face of the top plate close to the bottom plate; a fixed clamping seat which is connected with the stress sensor; a soil preparation assembly which comprises an upper matching sleeve detachably connected with the fixed clamping seat, at least two petal type side movable plates detachably connected with the upper matching sleeve, rubber films detachably arranged on the inner sides of the petal type side movable plates, and a lower matching sleeve detachably connected with the petal type side movable plates, at least two petal type side movable plates define a movable sleeve which is connected in the circumferential direction, and the lower matching sleeve is detachably connected to the bottom plate. When a soil body sample is manufactured and a tensile test is carried out, the purposes of manufacturing and stretching the soil body sample can be achieved by disassembling and assembling the soil manufacturing assembly.

Description

technical field [0001] The invention belongs to the technical field of slope strength research, and more specifically relates to a soil tensile test device and a soil tensile test method. Background technique [0002] Slope instability failure is a gradual change process of soil strength from tension failure to shear failure. Therefore, the study of soil tension strength is the key and basis for clarifying slope instability failure. The theoretical basis of slope stability analysis is the strength theory of soil. According to the deepening understanding of slope stability, a consensus has been reached on the fact that tension failure occurs near the top of the slope. However, the research on the theory of soil tensile strength is still in its infancy. At present, the main methods to determine the tensile strength of soil by test methods are divided into indirect method and direct method. The indirect method measures the fracturing strength of the sample by applying pressur...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a soil tensile test device and a soil tensile test method, aiming at When soil nails are set in the model to realize the tensile effect of the soil, due to the limitation of the shape of the mold, only the development of cracks on the surface of the soil can only be observed, resulting in a large dispersion of soil strength.

Images