Manufacturing method of barrel-shaped structural surface sample and externally tangent internal resistance type barrel-shaped shear apparatus

Abstract

The invention relates to a manufacturing method of a barrel-shaped structural surface sample and an externally tangent internal resistance type barrel-shaped shear apparatus. The invention aims to provide a manufacturing method of a barrel-shaped structural surface sample and an externally tangent internal resistance type barrel-shaped shear apparatus. According to the technical scheme, the manufacturing method of the barrel-shaped structural surface sample comprises the step of manufacturing an outer side structural surface of a barrel-shaped inner sample and an inner side structural surface of an annular outer sample matched with the outer side structural surface, and is characterized by comprising the following steps of acquiring point cloud data of upper and lower plates of a natural rock mass structural surface, constructing three-dimensional models of the barrel-shaped inner sample and the annular outer sample based on the point cloud data of the upper plate and the lower plate of the natural rock mass structural surface, forming the outer side structural surface of the barrel-shaped inner sample by equal-proportion configuration of the upper plate point cloud data, and forming the inner side structural surface of the annular outer sample by equal-proportion configuration of the lower plate point cloud data, and printing the three-dimensional models of the barrel-shaped inner sample and the annular outer sample to form solid models of the barrel-shaped inner sample and the annular outer sample by combining a 3D printing technology. The method is suitable for the rock mass structural surface mechanical behavior tester.

Description

technical field [0001] The invention relates to a method for making a barrel-shaped structural surface sample and an outer-cut and inner-resistance barrel-shaped shearer. 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 test proces...

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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, at present, the combination of 3D laser scanning technology and 3D printing technology is still rarely used to shape the structural surface of rock mass and apply it to physical tests.

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

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