Method for manufacturing tunnel test geologic model using cement base through 3D printing technology

Abstract

The invention discloses a method for manufacturing a tunnel test geologic model using a cement base through a 3D printing technology. The method comprises the following steps that a three-dimensional digital model of the tunnel test geologic model is established; the model is imported into a control system, and a printing path is generated to obtain thickness parameters of layered printing of the tunnel test geologic model; a cement-based printing material of the tunnel test geologic model is prepared; and 3D printing equipment prints a tunnel test geologic model base layer according to the thickness parameters and an operation path, profiles of structures such as a cavity and a crack in the tunnel test geologic model base layer are scribed through a subtractive manufacturing machine, a separated block body is taken out, and the process is repeated till the tunnel test geologic model is completed. According to the method for manufacturing the tunnel test geologic model using the cement base through the 3D printing technology, the mode of layering 3D model printing, layering material reduction scribing and unneeded block separation is adopted, accurate control over an internal structure of the tunnel test geologic model is achieved, operation is convenient, and the problems that operation is inconvenient due to the fact that material reduction separation is carried out after whole 3D model printing, the precision is affected by geologic model damage during material reduction, and the model is prone to be damaged are solved.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a method for making a geological model of a tunnel test by cement-based 3D printing technology. Background technique [0002] The geological test model is an important means for the safety research of rock mass engineering, and can provide basic, mechanism and intuitive results for the research of geotechnical science projects. Traditional geological model making usually adopts block stacking or filling with similar materials, which not only requires a large number of irregular templates to assist model forming, but also makes it difficult to guarantee the forming accuracy, especially the structural surfaces, interlayers and caverns inside the geological model cannot be made. Hidden flaws. For example, the production method of the large-scale geomechanical model with the publication number CN102663950A is to use prefabricated standard modules and then stack them together, wh...

AI Technical Summary

Problems solved by technology

Traditional geological model making usually adopts block stacking or filling with similar materials, which not only requires a large number of irregular templates to assist model forming, but also makes it difficult to guarantee the forming accuracy, especially the structural surfaces, interlayers and caverns inside the geological model cannot be made. hidden defect

For example, the production method of the large-scale geomechanical model with the publication number CN102663950A is to use prefabricated standard modules and then stack them together, which cannot guarantee the forming accuracy of the geomechanical model, especially for the internal complex structure.

At present, although there are some technologies that use 3D printing technology for concrete printing, because they print the geological model as a whole and then cut it, it is often impossible to accurately control the internal structure of the model. At the same time, the overall shape of the model There are restrictions on the subsequent cutting angle and viewing angle. For example, in a powder bonded 3D printing device and method for preparing complex geological models with the publication number CN112172139A, there is the above-mentioned problem of overall printing and then cutting processing.

Therefore, in order to solve the above problems, the present invention provides a method for making a geological model of a tunnel test by cement-based 3D printing technology to solve the problem that the accuracy of the geological test model is not high

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