Mould made for simulating multi-scale natural rock structure surfaces

Abstract

The invention provides a mould made for simulating multi-scale natural rock structure surfaces and used for making samples of the natural rock structure surfaces. The mould comprises a bottom plate and a fixed side plate, the bottom plate comprises a lower platform and a side wall perpendicular to the lower platform, the fixed side plate is perpendicularly and detachably fixed on the bottom plate and is perpendicularly connected with the side wall, the mould further comprises a moving side plate, the moving side plate is perpendicularly and detachably fixed on the bottom plate and is perpendicularly connected with the side wall, the mould further comprises an inserting plate, two opposite ends of the inserting plate are perpendicular to each other and are respectively perpendicularly and detachably connected with the fixed side plate and the moving side plate, and each of the side wall and the fixing side wall is provided with a level thereon. The mould has the advantages that the side plates are detachably connected and fixed, and size of the space in the mould can be accurately controlled; the mould has a further function of level regulation, the rock samples of different specifications are made, and various requirements of research experiment on the rock structure surfaces are met.

Description

technical field [0001] The invention relates to the technical field of engineering, in particular to a mold for making and simulating multi-scale natural rock mass structural surfaces. Background technique [0002] The rock masses on the earth have undergone various geological structures, and there are a large number of interlaced rock mass structural planes inside. The structural planes in the rock mass and the rock mass structure formed under their control control the deformation and failure mechanism of the rock mass. Because of the existence of these structural planes, the integrity of the rock mass is greatly reduced, and its mechanical properties and stability are also affected. Serious impacts will cause a series of engineering geological disasters. Therefore, an accurate grasp of the mechanical properties of rock mass structural planes is a key factor for rock mass engineering stability evaluation. [0003] In the experimental research, the shear strength parameters...

AI Technical Summary

Problems solved by technology

For natural proto-rock structural planes, there are many deficiencies in the study of direct shear tests. On the one hand, it is difficult to obtain a large number of proto-rock structural planes, the sampling cost is high, and the test period is long, which makes it difficult to meet the needs of a large number of engineering tests. The limitation of the means will easily lead to the poor fit of the obtained original rock structural surface and the lower wall, thus affecting the authenticity of the experimental research; on the other hand, once the original rock structural surface sample is obtained, its size cannot be changed, which is not conducive to The study of scale effect

[0004] In addition, in the process of the direct shear test of the structural surface, it was found that if the mold bottom plate is not placed horizontally, after the upper and lower plates of the structural surface sample are matched, the upper and lower flat bottom surfaces of the two plates will not be parallel. When the normal pressure is applied, a gap will be generated between the structural surfaces or the applied normal pressure will be eccentric, and the size of the gap and the degree of eccentricity of the normal pressure are determined by the unevenness of the bottom surfaces of the two plates; and when placed in the direct shear test When the sample thickness of the structural surface of the lower wall in the instrument is too large, it will cause the structural surface of the sample structural surface of the lower wall to bulge too high, so that the direct shear test cannot be performed normally, and if the sample thickness of the structural surface of the lower wall is too small, the structural surface Not fully exposed to the plane of the lower shear box of the direct shear instrument, resulting in inaccurate direct shear test results and loss of test value

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