Multi-layer shearing direct shear device

Abstract

The invention provides a multi-layer shearing direct shear device and belongs to the technical field of worker supplies. The multi-layer shearing direct shear device comprises an outer framework device, a shear box device, a horizontal loading device and a carrying device, wherein the shear box device and the horizontal loading device are distributed in the outer framework device; the carrying device is positioned on the side edge of the shear box device; at the top of the outer framework device, a vertical loading device corresponds to the shear box device and a hanging device corresponds to the horizontal loading device; a plurality of layers of steel frames for supporting the horizontal loading device are arranged on the outer framework device; the shear box device is provided with a plurality of layers of shear boxes; the carrying device is provided with a plurality of layers of bearing blocks; and a plurality of layers of steel frames, a plurality of layers of shear boxes and a plurality of layers of bearing blocks are flush with each other layer by layer. By the multi-layer shearing direct shear device, direct shear test on a plurality of shear surfaces of the same soil sample can be realized.

Description

technical field [0001] The invention provides a direct shear device for multi-layer shearing, which belongs to the technical field of agricultural and industrial supplies. Background technique [0002] The formation of dumps is an inevitable result of mining, especially open pit mining. Its constituent materials are mainly composed of topsoil and rocks stripped and covered during open-pit mining, and sometimes include off-surface ore and lean ore that may be recovered. Because the dump site is a huge artificial loose accumulation body, this characteristic makes the dump site very easy to form mine geological disasters such as landslides and mud-rock flows. Therefore, the accurate determination of the mechanical parameters of rock and soil materials is the key factor for evaluating and controlling the instability of geotechnical engineering, and its significance in geotechnical engineering is self-evident. However, due to the inhomogeneity and randomness of the particle...

AI Technical Summary

Problems solved by technology

Even if the 4-5 soil samples are completely consistent, the structure of the soil samples in the shear plane during the sample loading process is completely different due to the large disparity in the particle size of the bulk coarse-grained material and the randomness of the particle size distribution. , so the experimental bulk shear strength parameter error is large

At the same time, a sample is only subjected to one shear test, which wastes a lot of financial, material and time resources.

And the reliability of the experimental shear strength parameters obtained by it is also greatly reduced

The structure of the triaxial instrument for coarse-grained soil is complicated, the purchase cost of the instrument is high, the operation of the instrument is complicated, and the scope of application is small; and the manpower, time and financial resources spent on the triaxial test are much higher than those of the direct shear test instrument.

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