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

Method for Determination of Anisotropic Elastic Modulus of Schist

A technology of elastic modulus and anisotropy, which is applied in the field of measuring the anisotropic elastic modulus of schist, can solve the problems of insufficient engineering support, collapse, etc., and achieve the effect of reducing surrounding rock damage and excavation disturbance

Active Publication Date: 2015-09-30
ZHEJIANG ZHONGKE ITASCA ROCK ENG RESDEV +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When designing many deep tunnels built in schist areas at home and abroad, only the uniaxial strength and elastic modulus when the schist is horizontal or vertical are used as the basis for the calculation of rock mass deformation parameters. collapse caused by insufficient support

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 Determination of Anisotropic Elastic Modulus of Schist
  • Method for Determination of Anisotropic Elastic Modulus of Schist
  • Method for Determination of Anisotropic Elastic Modulus of Schist

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The method for determining the anisotropic elastic modulus of schist in this embodiment is characterized in that the steps are as follows:

[0016] a. Since the schist is extremely vulnerable to damage during the sampling process, the damaged rock sample is used for the test, and the measured test data cannot reflect the strength and deformation characteristics of the original rock. Therefore, this embodiment adopts non-destructive sampling technology to reduce sampling damage , the specific steps include, a1, such as figure 1 As shown, a 3m×3m (section size) exploration hole 1 is excavated at the schist site, and its section is obliquely intersected with the schist; The schist cuboid 3 arranged in the axial direction of the exploration hole 1, the length of the schist cuboid in the axial direction of the exploration hole 1 is 6m, and the side length on the section of the exploration hole 1 is not less than 1.5m; At the central part of the section of the schist cuboid ...

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

PropertyMeasurementUnit
lengthaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for determining the anisotropic elastic modulus of a schist, and aims at providing the method for determining the anisotropic elastic modulus of the schist so as to provides a reliable foundation for accurately estimating the stability of a tunnel of the deeply burned schist and late support. The technical scheme disclosed by the invention is that the method for determining the anisotropic elastic modulus of the schist is characterized by comprising the following steps of: a, carrying out scene nondestructive sampling; b, obtaining three groups of rock cores drilling in parallel direction, in vertical direction and in a direction in which boreholes and the schist form certain included angles; c, respectively carrying out a uniaxial compression test on the three groups of rock cores, so as to obtain an intact stress-strain curve of each rock core, and obtain the mean elastic modulus and the mean poisson ratio of each group of rock cores; d, inserting the test result obtained from the step c into the following formula to determine variable G'; and e, inserting E, E', v' and G' into the formula, and then taking the inverse number, so as to obtain a curve of which the elastic modulus of the loading direction changes along the included angles beta. The method is suitable for deeply buried tunnel engineering.

Description

technical field [0001] The invention relates to a method for measuring the anisotropic elastic modulus of schist, which is mainly applicable to deep buried tunnel engineering. Background technique [0002] The deformation parameters of schist have obvious anisotropy characteristics, that is, the deformation modulus in each direction is not equal, and the main reason for the anisotropy of deformation modulus is the distribution of schist planes in schist. Directional loading, schizotyping and fracture modes of the rock matrix are different, ultimately resulting in different deformation characteristics. For the design of deep-buried tunnels, anisotropic deformation characteristics will lead to significant differences in the extrusion deformation of surrounding rocks at various parts of the tunnel section. From the perspective of accurately evaluating the stability and support design of deep-buried schist tunnels, relevant calculations are required. And the analysis considers ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N1/04
Inventor 褚卫江张春生侯靖刘宁
Owner ZHEJIANG ZHONGKE ITASCA ROCK ENG RESDEV
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