Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing rregular columnar joint type rock sample

A technology of columnar joints and rock samples, which is applied in the field of geotechnical engineering, can solve the problems of rock samples without joint fissures, difficulty in drilling natural rock samples, and disturbance of joint structural planes, so as to save test cost and time, improve Experimental yield rate, the effect of improving the overall stability

Active Publication Date: 2019-10-25
HOHAI UNIV
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Experimental research is the most direct and effective way to obtain the mechanical properties of irregular columnar joint rock mass. However, the actual engineering site columnar joint rock mass is broken, and it is difficult to drill natural rock samples containing multiple groups of columnar joints. On the one hand, the drilled rock samples will cause excessive disturbance to the joint structural plane; on the other hand, due to the problem of laboratory scale, the rock samples usually do not contain joint fissures or only have some joint fissures, which is not representative.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing rregular columnar joint type rock sample
  • Method for preparing rregular columnar joint type rock sample
  • Method for preparing rregular columnar joint type rock sample

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] A kind of preparation method of irregular columnar jointed rock mass rock sample of the present invention, comprises the following steps:

[0029] (1) Select the columnar joint area to be studied, obtain the three-dimensional digital model of each jointed rock block in the irregular columnar jointed rock mass, and generate a solid mold for forming each jointed rock block;

[0030] Such as Figure 4~5 , the solid mold is spliced ​​by several individual irregular mold blocks, each mold block contains a part of the forming area of ​​the jointed rock block, and the adjacent mold blocks are spliced ​​to obtain the complete forming area of ​​the jointed rock block. Vent holes are provided at the bottom of the formed area of ​​each jointed rock block to help alleviate the problem of trapped air bubbles generated during subsequent grouting pours. Adaptive bayonets and slots can be set on the splicing surfaces of adjacent mold blocks, which is helpful for accurate positioning b...

Embodiment

[0042] The method of the present invention is described by taking the preparation of a rock-like sample of an irregular columnar jointed rock mass at an engineering site as an example.

[0043] (1) figure 1 A photograph of the exposed irregular columnar joints taken for a project site, based on the photos, the joint lines were drawn in the CAD software, and the irregular columnar joints were split into multiple jointed rock blocks;

[0044] (2) Obtain the area and geometric center point of each jointed rock block, and number the jointed rock blocks sequentially according to the area from large to small, such as figure 2 At the same time, the jointed rock blocks are classified, and those with similar areas and sizes are classified into one category, for example, numbers 1 to 5 are one category, numbers 6 to 11 are the second category, and numbers 12 to 18 are the third category;

[0045] (3) According to the classification, the jointed rock blocks are rearranged into 6 rows, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing an irregular columnar joint type rock sample. The method comprises the following steps: (1), selecting a to-be-studied columnar joint area, acquiring a three-dimensional digital model of each joint rock block in an irregular columnar joint rock mass, and generating solid molds for forming all joint rock blocks; (2), preparing cement mortar and carrying out pouring on the solid molds to obtain cylinders simulating all joint rock blocks; (3), carrying out cylinder demolding and carrying out maintenance; and (4), adhering the irregular cylinders after maintenance according to an actual columnar joint rock joint network and carrying out cutting and grinding to obtain an irregular columnar joint rock sample. The solid mold is formed by splicing ofa plurality of separate irregular mold blocks; each mold block includes a partial forming area of the joint rock block; and the adjacent mold blocks are spliced to obtain a complete forming area of the joint block. With the disclosed method, the rock sample with the high conformity with the engineering rock is obtained; and the joint fracture is simulated and method is representative.

Description

technical field [0001] The invention relates to a method for preparing a sample, in particular to a method for preparing a rock sample with irregular columnar joints, and belongs to the field of geotechnical engineering. Background technique [0002] Columnar joints are a kind of primary tensile fracture structure commonly found in volcanic lavas. It often cuts the complete rock mass into irregular prisms, usually in the shape of square, five, or hexagonal prisms. It has special rock mass structure and mechanical properties. Many large hydropower stations in Southwest China, such as the Baihetan Hydropower Station, Xiluodu Hydropower Station, Leshan Tongjiezi Hydropower Station in Sichuan, Jin'anqiao Hydropower Station in the lower reaches of the Jinsha River, etc., encountered columnar joint rocks during the construction process. The integrity of the columnar joint rock mass is poor, with obvious discontinuous, easy to crack and anisotropic mechanical characteristics. Bot...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N1/28G01N1/36G06F17/50G06T7/62G06T17/00
CPCG01N1/28G01N1/36G06T17/00G06T7/62G01N2001/366G01N2001/364G06T2200/08G06T2207/30132G06F2111/10G06F2119/06G06F2119/08G06F30/20
Inventor 王环玲向志鹏徐卫亚孟庆祥李跃苏佳盼刘士奇
Owner HOHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com