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Preparation method and preparation mold of blind-joint rock mass model sample containing different joint roughness

A technology of sample preparation and hidden joints, which is applied in the field of rock mechanics and rock engineering, can solve the problems of lack of samples of hidden joint rock mass models with different joint roughness and inconvenience, and achieve realistic effects, convenient disassembly and high precision. Effect

Inactive Publication Date: 2017-05-31
HOHAI UNIV
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Problems solved by technology

[0004] At present, the preparation of jointed rock mass models is mostly to prepare samples of similar materials of columnar jointed rock mass or rock samples of random cracks, but there is a lack of preparation of rock mass model samples with different joint roughness and hidden joints. Rock mechanics test brings inconvenience

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  • Preparation method and preparation mold of blind-joint rock mass model sample containing different joint roughness
  • Preparation method and preparation mold of blind-joint rock mass model sample containing different joint roughness
  • Preparation method and preparation mold of blind-joint rock mass model sample containing different joint roughness

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Embodiment Construction

[0028] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0029] Taking the preparation of a hidden jointed rock mass model sample with a third-level joint roughness of 4 to 6 as an example, the operation process of this embodiment is as follows figure 1 shown, including the following steps:

[0030] Step 1. Based on 10 standard joint sections, use the computer-aided design software AutoCad to establish hidden joint sample models with different joint roughness, digitize the standard contour curve of the joint roughness coefficient, and input the digitized joint roughness curve into the computer and share it with the 3D printer connected;

[0031] Step 2. Prepare the powdered raw materials and adhesive glue required by the 3D printer and load them into the 3D printer. Print the hidden joint inserts according to the joint roughness curve set in step (1). In this embodiment, low strength is selected. T...

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Abstract

The invention discloses a preparation method of a blind-joint rock mass model sample containing different joint roughness. The preparation method comprises the following steps: modeling blind-joint samples containing different joint roughness, digitalizing a standard contour curve of joint roughness coefficients, inputting the digitized joint roughness curve to a computer, and connecting with a 3D printer; preparing a powdery raw material and adhesive glue required for the 3D printer, loading into the 3D printer, and printing blind-joint inserts according to a set joint roughness curve; cutting the printed blind-joint inserts to obtain blind-joint pieces required for tests; pouring part of cement mortar into a mold, placing the blind-joint pieces, filling the mold with the cement mortar; curing until the cement mortar is solidified and formed to form a sample part beginning to take a shape, and then demolding; polishing the sample to obtain the blind-joint rock mass model sample containing different joint roughness and satisfying test requirements. The method can be used for accurately preparing the blind-joint rock mass model sample containing different joint roughness.

Description

technical field [0001] The invention belongs to the fields of rock mechanics and rock engineering, and in particular relates to a method for preparing model samples of rock mass with hidden joints with different roughness of joints and a mold for preparing them. Background technique [0002] Jointed rock mass is a complex rock mass often encountered in water conservancy and hydropower engineering, tunnel engineering, and mining engineering. The rock mass contains natural weak planes of different scales. Under the action of geological movement, these existing weak planes will close, open, expand or cause new cracks in the rock. Compared with intact rock blocks, the mechanical properties of jointed rock mass are largely determined by these weak structural planes. When groundwater flows in a jointed rock mass, the characteristics of the joints, such as roughness, largely affect the mechanical and hydraulic properties of the jointed rock mass. [0003] Hidden joints are genera...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 王环玲赵恺徐卫亚向志鹏夏季
Owner HOHAI UNIV
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