Method for preparation of columnar jointed rock mass similar material sample by 3D printing technology

A technology of columnar joints and similar materials, applied in the field of rock mechanics and engineering, can solve the problems such as the impossibility of carrying out a large number of tests and the inability to accurately control the porosity of samples, and achieve high yield, environmental protection and resource saving, and simple preparation process Effect

Inactive Publication Date: 2015-04-15
HOHAI UNIV
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Problems solved by technology

However, these methods all have disadvantages: the test results are highly discrete with samples taken on site; field tests are usually limited by conditions such as the site environment and test costs, and it is impossible to conduct a large number of tests; When preparing s

Method used

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  • Method for preparation of columnar jointed rock mass similar material sample by 3D printing technology
  • Method for preparation of columnar jointed rock mass similar material sample by 3D printing technology
  • Method for preparation of columnar jointed rock mass similar material sample by 3D printing technology

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Embodiment

[0025] Taking printing a completely filled cylindrical sample as an example, the operation flow of this embodiment is as follows figure 1 As shown, including the following steps:

[0026] Step 1: First, prepare the powdered raw materials required for printing of similar material samples of columnar jointed rock mass. The powdered raw materials mainly include columnar jointed columnary powder materials and jointed powder materials. In addition, the powdered materials used for cementing and bonding are provided. Connect the glue.

[0027] The above-mentioned powdery materials can use similar materials such as concrete materials, resin materials and other composite materials, or collect on-site columnar jointed rock masses (joint fillers) from the site and grind them into a powder shape that a 3D printer satisfies. The powdery adhesive material acts as a bonding agent. Columnar joints, column powder materials and joint powder materials are cemented and bonded with different strength ...

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Abstract

The invention discloses a method for preparation of a columnar jointed rock mass similar material sample by a 3D printing technology. The method includes: preparing powdered 3D printing raw materials: powder, columnar jointed column powder, joint needed powder and cementing bonding powder; loading the powdered materials into a 3D printer; establishing a columnar jointed sample three-dimensional model, and inputting the model into the 3D printer to conduct 3D printing; and carrying out after-treatment on the sample at the end of printing. The method provided by the invention applies the 3D printing technology into rock mechanical test for the first time, uses a similar material to simulate the basic characteristics of a columnar jointed rock mass in actual engineering, and has the advantages of simple preparation process, higher production efficiency than artificial sample preparation, and high yield, etc.

Description

Technical field [0001] The invention belongs to the field of rock mechanics and engineering, and relates to the preparation of samples during experimental research of rock mechanics, and in particular to a method for preparing samples of similar materials in columnar jointed rock masses using 3D printing technology. Background technique [0002] In the neighborhood of rock mechanics and rock engineering, rock testing is the basis for studying the physical and mechanical properties of rocks and rock mechanics, and an important method for laboratory rock testing of rock mechanics. [0003] The samples usually used in the laboratory test of rock mechanics are collected from the rock mass on site. For rock masses with broken rock mass structure and relatively many structural surfaces, it is very difficult to sample on site through drilling. In order to overcome these difficulties, researchers have adopted field tests instead of indoor tests, or used concrete, resin and other similar ma...

Claims

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Application Information

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IPC IPC(8): G01N1/28
Inventor 闫龙徐卫亚王如宾王环玲张久长孟庆祥吉华林志南冉少鹏俞隽
Owner HOHAI UNIV
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