Direct shear box for studying mechanical properties of contact surface

Abstract

The invention discloses a direct shear box for studying mechanical properties of a contact surface. The direct shear box structurally comprises a shell, a lower shear box, an upper shear box, a sheath hole and a pressing plate. The shear box has the beneficial effects that through cooperation of an arranged demolding assisting mechanism and a convex thread, after experimental research is completed, a sample block on the surface of a storage disc is pushed out towards the upper portion in a lower shearing box in the rotating and rising process through rotation, and during rotation, the sample block stretches into a vibration groove in cooperation with an elastic pushing cone, and meanwhile under the action of a magnetic structure of the elastic pushing cone, the lower shear box is provided with a vibration groove, the vibration groove and the inner wall of the vibration groove are adsorbed, instantaneous attaching vibration force is generated, inertia vibration formed by the vibration groove can improve the demolding effect of a sample block, meanwhile, the sample block is prevented from being bonded to the inner wall of the lower shear box, and through the arranged suction and seepage structure, liquid at the seepage position of an object due to pressure in the experiment process can be further absorbed, and therefore, inaccurate data generated by the research on the sample block can be avoided.

Description

technical field [0001] The invention relates to the field of indoor geotechnical tests, more precisely, it relates to a direct shear box for studying the mechanical properties of contact surfaces. Background technique [0002] Contact surface mechanics is a test aimed at testing the mechanical properties of geotechnical materials when they interact with structural surfaces of a certain roughness. [0003] When using the direct shear box to study the mechanical properties of the contact surface of the object to be studied, due to the different types of objects and different materials, for example, when studying relatively wet soil, in the process of applying pressure to the sample block, The liquid contained in the sample block will overflow the gap between the upper and lower direct shear boxes under the action of pressure, and infiltrate and stay in the lower direct shear box, which will affect the research data of the sample block, and when the mold is demoulded, due to th...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a direct shear box for studying the mechanical properties of the contact surface, so as to solve the problems of the prior art, such as in the process of applying pressure to the sample block when studying relatively wet soil. , the liquid contained in the sample block will overflow the gap between the upper and lower direct shear boxes under the action of pressure, and infiltrate and stay in the lower direct shear box, thereby affecting the research data of the sample block, and due to The sample block is subjected to greater pressure, so it is not easy to perform a complete demoulding process, and there are defects that the edges and corners are stuck in the lower shear box

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