Visual shearing and sample loading box applicable to direct shear test of coarse-grained soil

Abstract

The invention discloses a visual shearing and sample loading box applicable to direct shear test of coarse-grained soil. The visual shearing and sample loading box applicable to the direct shear test of the coarse-grained soil comprises an upper shearing box, a lower shearing box, a bearing plate, a rigid assembly A and a rigid assembly B, wherein the rigid assembly A and the rigid assembly B are used for transmitting pressure and shearing force; the upper shearing box and the lower shearing box are connected in series and fixed together through a fixing pin; the bearing plate is mounted above the upper shearing box; the rigid assembly A is arranged on the bearing plate; the rigid assembly B is arranged on the side surface of the upper shearing box; a foam gasket and limit steel balls are also arranged between the upper shearing box and the lower shearing box; the upper shearing box and the lower shearing box are made of completely-transparent tempered glass; mark strips are posted on the inner side walls of the upper shearing box and the lower shearing box. Due to the adoption of the visual shearing and sample loading box applicable to the direct shear test of the coarse-grained soil, the stress condition of the coarse-grained soil particles can be directly observed; by observing movement of the particles and deformation of the soil, the condition that the soil is sheared and damaged can be more deeply known and the principle of the direct shear test can be known, and thus the stress condition of the soil and a development process of a shear zone can be well known.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and relates to a coarse-grained soil direct shear test device, in particular to a coarse-grained soil direct shear test visual shear sample loading box. Background technique [0002] In the field of geotechnical engineering, coarse-grained soil, as a common construction and engineering material, is widely used, mainly responsible for engineering functions such as shear resistance and anti-skid. Coarse-grained soil generally has the characteristics of uneven particle size, small cohesive force between particles, high individual particle strength, high shear strength, large bearing capacity, and low compressibility. In order to obtain the shear strength parameters of coarse-grained soil, it is usually obtained through direct shear test or triaxial test. However, the traditional direct shear test can only obtain the strength parameters of the soil, but cannot explore the stress sta...

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Problems solved by technology

The coarse-grained soil direct shear instrument described in the above technical solution cannot visually observe the movement and deformation process of soil particles, and cannot better understand the stress situation of the soil and the development process of the shear zone, that is, the shear failure of the soil process

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