Joint test specimen method using 3D (three-dimensional) printing for making structure surface containing specific geometrical characteristics

Abstract

The invention provides a joint test specimen method using 3D (three-dimensional) printing for making a structure surface containing specific geometrical characteristics, and belongs to a specimen making method of model test specimens similar to joint rock bodies. According to the method, the structure surface is independently designed according to study requirements, or the actual rock body structure surface appearance is obtained through a surface outline scanning technology; the designed structure surface penetrates through a complete cylinder model in 3D graphics software, two parts of complementary test block models obtained through separation are obtained through Boolean operation, and a 3D printer is used for respectively printing and forming the two parts of test block models; printing molds are respectively put into two specimen making boxes and are assembled, similar materials are cast into the specimen making boxes, and the mold dismounting maintenance is carried out after the materials are solidified and formed; the two parts of test blocks are correctly combined to obtain the standard test specimens containing the designed structure surface. The method has the advantages that (1) the operation of the method is safe, simple and convenient; (2) the complicated and variable structure surface is embedded in the standard test specimens, the actual rock body structural surface can be reproduced through being matched with the surface outline scanning technology, and the reasonable test result is obtained.

Description

technical field [0001] The invention relates to a sample preparation method for a similar model sample of a jointed rock mass, in particular to a method for making a joint sample with a structural surface with specific geometric features by using 3D printing. Background technique [0002] The rock mass in nature produces various structural planes due to the complex geological action, and this structural plane largely affects the mechanical characteristics of the jointed rock mass. Since the geometry of structural planes inside real jointed rock mass is difficult to obtain clearly, similar model materials can be used to make rock-like samples of jointed rock mass. The key point of making this type of rock sample is to be able to embed structural planes with geometric parameters such as different shapes, inclination angles and roughness inside it. At present, the research methods for jointed rock mass are mainly to roughly infer the shape of the structural plane through the o...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method that is easy to operate and can be flexibly produced with different morphological features according to the needs. Using 3D printing to produce a joint sample method with a structural surface with specific geometric features, it can solve the operational difficulties of joint rock samples and the joint shape. Unsatisfactory sample preparation

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