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

Field rock mass poisson ratio test method

A test method, Poisson's ratio technology, applied in the direction of electric / magnetic solid deformation measurement, using stable tension / pressure test material strength, electromagnetic measurement device, etc., can solve the problem that is difficult to achieve, the measured value cannot be directly verified, smooth The influence of the degree of glue and the method of pasting, etc., to achieve the effects of cost reduction, simple implementation method, and accurate measurement data

Inactive Publication Date: 2015-04-01
YELLOW RIVER ENG CONSULTING
View PDF4 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] As we all know, Poisson's ratio is directly related to rock strength, weathering degree, and development of joints and fissures. In indoor rock Poisson's ratio test, strain gauges are pasted on the specimen. The pasting method, etc. will affect the measurement data, and the measurement value cannot be directly verified
If the Poisson's ratio of the rock mass can be measured from the site where the rock mass deformation test is carried out, the value will be more reasonable. However, since there is no good method to measure the lateral deformation of the rock mass on site, the indoor rock test method will be limited by The site environment and conditions are difficult to achieve

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
  • Field rock mass poisson ratio test method
  • Field rock mass poisson ratio test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The following is a detailed description of the on-site rock mass Poisson's ratio test method of the present invention with reference to the accompanying drawings:

[0026] The first step is to make and calibrate the strain-type elastic steel collar 1:

[0027] Such as figure 2 As shown, two pieces of strain gauges 2 are symmetrically attached to the inside of a customized elastic steel collar 1 with an inner diameter of 10.5cm, a width of 0.6cm, and a thickness of 0.1cm. When pasting, it is placed between the elastic steel collar 1 and the strain gauge 2. Apply glue, and after consolidation, apply a layer of moisture-proof glue on the outer surface and periphery of strain gauge 2; install two steel contacts 3 symmetrically at 90° from the inside of the elastic steel collar and the sticking position of strain gauge 2. The contact 3 is a cylinder with a diameter of 3.0mm and a length of 5.0~10.0mm. The front part is a smooth round surface, and the rear part is connected with...

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a field rock mass poisson ratio test method. The method comprises the steps of firstly digging a test flat hole in a mountain, drilling a cylindrical test piece on bedrock on the bottom surface of the test flat hole by utilizing a hollow drill bit, and symmetrically perforating test holes in the bottom of an annular groove at the periphery of the test piece; sleeving the test piece with an elastic steel lantern ring provided with a steel contact and a strain plate, connecting a strain plate test line and a resistance strain gauge, and calculating transverse deformation of the test piece by virtue of test; fixing the top surface of the test piece together with a test flat hole top plate sequentially through a pressure plate, a jack, a reducing connector steel plate, a combined force transfer rod and a hinge anchor, installing measuring points in bolt holes in two sides of the pressure plate and in the test holes in the bottom of the annular groove, and installing a dial indicator above the measuring point; calculating vertical deformation of the test piece after the load test; then calculating a corresponding transverse strain value and a vertical strain value, and calculating the poisson ratio of the test piece according to the transverse strain value and the vertical strain value. The field rock mass poisson ratio test method has advantages that the implementation method is simple and rapid, the measurement data is accurate and reliable, and the real condition of the rock mass can be comprehensively reflected.

Description

Technical field [0001] The invention relates to the deformation modulus of a rock mass in the construction of a water conservancy project, in particular to a method for testing the Poisson's ratio of the rock mass on site. Background technique [0002] Poisson's ratio refers to the ratio of the absolute value of the transverse strain to the vertical strain when a material is subjected to unidirectional compression (or tension). The deformation (or elasticity) modulus of the rock mass in the construction of water conservancy projects is an important design parameter of the project. This parameter is to obtain the pressure and the corresponding deformation value through the deformation test of the rock mass, and then perform the deformation modulus and elastic modulus of the rock mass. For calculation, the calculation formula is shown in formula 1.1. [0003] Formula 1.1 [0004] In the formula: E —— deformation modulus or elastic modulus, MPa; in f...

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 Applications(China)
IPC IPC(8): G01N3/10G01B7/16
Inventor 袁兆华李运奎陈艳陈学理刘冠峰
Owner YELLOW RIVER ENG CONSULTING
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