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

Method for measuring surface membrane penetration amount of sand-gravel material triaxial sample by digital image technology

A triaxial sample and digital image technology, applied in the direction of measuring device, using stable tension/pressure to test material strength, analyzing materials, etc., can solve the problem that it is impossible to simulate the change of embedded amount, it is difficult to ensure the accuracy of test results, and the operation Difficulty and other issues, to achieve good promotion value, ensure accuracy, and low laboratory environment requirements

Active Publication Date: 2019-11-12
DALIAN UNIV OF TECH +1
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot simulate the change of embedding amount caused by particle dislocation during the consolidation process of the actual triaxial sample.
The operation of the sample preparation process is difficult, and at the same time, human factors are introduced in the pasting process, which makes it difficult to guarantee the accuracy of the test results

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 measuring surface membrane penetration amount of sand-gravel material triaxial sample by digital image technology
  • Method for measuring surface membrane penetration amount of sand-gravel material triaxial sample by digital image technology
  • Method for measuring surface membrane penetration amount of sand-gravel material triaxial sample by digital image technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The above-mentioned measurement method will be described in detail below in conjunction with examples.

[0034] The invention relates to a method for measuring the embedding amount of the surface film of a triaxial sample of sand and gravel by digital image technology, comprising the following steps:

[0035] (a) Using a new type of medium-sized visual triaxial test equipment, prepare a saturated triaxial sample of sand and gravel material according to the conventional test method in the "Soil Engineering Test Regulations"-procedure number SL237-1999. The sample is a cylinder with a height of 200mm and a diameter of 100mm. The control index of sample preparation is relative compactness. In this test, the gradation of the gravel used is shown in figure 1 , the relative compactness of the sample preparation control index is 50%. The rubber film used in the installation process of the triaxial sample has undergone speckle treatment. The treatment method is to randomly sp...

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 measuring the surface membrane penetration amount of a sand-gravel material triaxial sample by a digital image technology, belonging to the technical field of geotechnical tests. The method includes the following steps of: in a conventional triaxial isotropic consolidation test, obtaining a deformed image of a triaxial sample at the completion of each stage ofloading and consolidation, obtaining the skeleton volume deformation of the triaxial sample after the processing of digital image correlation technologies, and then constituting a basic theory from the skeleton deformation area of the triaxial sample body and the rubber membrane penetration area according to the total drainage volume of the triaxial sample body to calculate the change amount of the rubber membrane penetration area with the confining pressure. The scheme of the invention only needs a conventional triaxial tester and a single-lens reflex camera, and is simple in equipment. The method of the invention is fully coupled to the conventional triaxial isotropic consolidation test without additional ancillary tests. The method belongs to a full-surface non-contact measurement method, and can realize the non-contact measurement of the axial deformation and radial deformation of the full surface of the triaxial sample body, cannot cause any interference to the triaxial sample body in the measurement process, ensures the accuracy of subsequent test results, and has good promotion value.

Description

technical field [0001] The invention relates to a method for measuring the embedding amount of a surface film of a triaxial sample of sand and gravel by digital image technology, and belongs to the technical field of geotechnical testing. Background technique [0002] In order to study the mechanical properties of soil, the triaxial test is the most widely used in all kinds of soil engineering tests, but there are still some factors that affect the accuracy of the test, such as the embedding of the rubber film on the surface of the triaxial sample. In a conventional triaxial test, a layer of rubber film covers the surface of the triaxial sample to isolate the external pressure space from the triaxial sample, and the external pressure is applied to the triaxial sample through the rubber film. The soil particles in the sample are filled unevenly, and there are a large number of pores on the surface of the sample. When the effective confining pressure changes, the depth of the ...

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): G01N3/08G01N3/02G01B11/16
CPCG01B11/16G01N3/02G01N3/08
Inventor 邹德高季晓檬桑勇刘京茂周晨光张良陈涛马斌梁存绍
Owner DALIAN UNIV OF TECH
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