Internal-tangent external-resistance type barrel-shaped structural plane shearing instrument combined with 3D printing technology

Abstract

The invention relates to an internal-tangent external-resistance type barrel-shaped structural plane shearing instrument combined with a 3D printing technology. The internal-tangent external-resistance type barrel-shaped structural plane shearing instrument comprises a frame; a shear box provided with an inner barrel bottom plate arranged corresponding to the bottom surface of a barrel-shaped inner sample, and an outer cover bottom plate and a shear box outer side wall which are respectively arranged corresponding to the bottom surface and the outer side surface of an annular outer sample, wherein a shear box outer side wall and the outer cover bottom plate are connected into a whole to form a shear box outer cover, and the inner barrel bottom plate and the outer cover bottom plate can be mounted on the frame in a manner of rotating around the axes of the inner barrel bottom plate and the outer cover bottom plate; an axial pressurizing mechanism I positioned above the barrel-shaped inner sample and used for applying axial pressure to the barrel-shaped inner sample; an axial pressurizing mechanism II positioned above the annular outer sample and used for applying axial pressure to the annular outer sample; a rotary driving mechanism connected to the inner barrel bottom plate and used for driving the barrel-shaped inner sample to rotate around the axis of the barrel-shaped inner sample through the inner barrel bottom plate; a shearing monitoring mechanism used for collecting shearing parameters between the outer side structural surface of the barrel-shaped inner sample and the inner side structural surface of the annular outer sample.

Description

technical field [0001] The invention relates to an internal cutting and external resistance barrel-shaped structural surface shearing instrument combined with 3D printing technology. Applicable to rock mass structural surface mechanical behavior tester. Background technique [0002] The direct shear instrument is a commonly used test instrument for the study of the shear properties of rock and soil. It is not only suitable for soil shear, but also often used for shearing of rock mass structural planes and soil-rock contact surfaces. The advantages of the direct shear instrument: (1) The shape condition of the shear surface is clear; (2) The loading condition is straightforward; (3) The test procedure is relatively simple. However, it also has the following disadvantages: (1) It can only achieve one-way short-distance shearing, which is used to obtain peak strength, but it is difficult to obtain residual strength; (2) The effective shear area continues to decrease during the...

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Problems solved by technology

However, it also has the following disadvantages: (1) It can only achieve one-way short-distance shearing, which is used to obtain peak strength, but it is difficult to obtain residual strength; (2) The effective shear area continues to decrease during the test process, and the test data needs to be obtained. fix

However, it is rare to use the combination of 3D laser scanning technology and 3D printing technology to shape the structural surface of rock mass and apply it to physical test research.

And currently there is no concept of 3D shaping of equal-proportional barrel-shaped structural surfaces based on point cloud data of planar structural surfaces

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