Shearing box device for rock-like material

Abstract

The invention belongs to the technical field of mechanical test equipment, and relates to a shearing box device for a rock-like material. Upper box moving parts are positioned at two sides of an upper shearing box, and are connected with an upper box top and an upper box bottom respectively; an upper box bottom fixed groove is fixedly formed in the lower side of the upper box bottom; a lower box top fixed groove is fixed in the upper side of a lower box top and corresponds to the upper box bottom fixed groove; lower box top fixed rolling balls are uniformly distributed in the lower box top fixed groove; lower box moving parts are connected with a lower box top and a lower box bottom fixedly and respectively; two lower box direction moving plates are respectively fixed on the upper and lower end parts of different lower box direction fixed plates; a lower box bottom direction plate is combined with a lower box bottom threaded rod; the bottom end of the lower box bottom threaded rod is fixed on the lower box bottom, and the top end of the lower box bottom threaded rod is in contact with the lower box bottom direction plate. The shearing box device for the rock-like material is simple in integral structure principle, is flexible and convenient to use and operate, has a good observation effect, is high in sampling success ratio, is high in adaptability, and ensures high test result accuracy and environment-friendly experiments.

Description

Technical field: [0001] The invention belongs to the technical field of mechanical test equipment, and relates to an improved shear box device for rock-like materials, which is used for indoor tests of shear strength of rock-like materials such as rocks and concrete, and replaces the shear box of the prior art device. Background technique: [0002] At present, in construction projects, underground projects and dam construction projects, in the design and construction stages, the geological environment around the project and the shear strength of construction materials can be known in advance, which can ensure the safety of related project construction and use. The shear strength of the engineering structure is conducive to grasping the safety status of the engineering structure at any time. In the existing indoor shear strength test process of rock-like materials, the samples taken from the project are generally tested with a shear box device, and the shear strength of the ...

AI Technical Summary

Problems solved by technology

The existing indoor shear cell test method has a very obvious shortcoming in that the size of the shear cell and the shear failure surface are preset. During the indoor test, the size of the shear cell is fixed, and the size of the sample to be tested is required to be Fixed and strict, it can only be applied to regular samples within a certain size range; in the actual sampling process, whether it is engineering surrounding rock or engineering structure, strict sampling requirements will bring inconvenience to the preparation of the sample, and it is unqualified The engineering sample will seriously affect the shear test results, reduce the accuracy and reliability of the test results, thereby affecting the judgment of the structural stability in the process of engineering design, construction and later use; at the same time, the existing shear box failure surface The preset is to use the edge of the shear box. On the premise that the sample meets the requirements of the shear test, the shear failure surface appears in the plane of the sample, and the failure surface is unique; a single preset failure surface cannot meet the requirements of the shear strength. In the research process, the requirements for failure surfaces at different angles, and reduce the universality and applicability of the shear test results, the test results may even provide wrong guidance for engineering applications and increase safety hazards to the project; the upper and lower boxes of the existing shear box When the force of the shear box is uneven, the upper and lower shear boxes will cause the change of the preset shear failure surface, thereby changing the shear test results. At the same time, the friction between the upper and lower boxes will also cause the shear test. The difference in the results reduces the reliability of the test results

With the rapid increase of the amount of construction projects, the rapid development of domestic and foreign economies, and more and more large-scale projects, in order to ensure the safety of engineering design, construction and use, more requirements have been put forward for the shear strength of surrounding rock and engineering structures. There is a clear requirement, which puts forward a higher and higher demand for a reasonable indoor shear cell device, but there is no research report on an improved shear cell device for rock-like materials from the existing literature, and it is also No relevant patent technology has been published

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