Device for testing three-dimensional strain state inside soil mass and testing method

A strain state and testing device technology, applied in electromagnetic measuring devices, electric/magnetic solid deformation measurement, etc., can solve problems such as waste of materials and violation of environmental protection concepts, and achieve the effects of improving safety reserves, improving accuracy, and high calculation accuracy

Inactive Publication Date: 2017-01-11
TIANJIN CHENGJIAN UNIV
View PDF6 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The waste of materials is serious, which is contrar

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
  • Device for testing three-dimensional strain state inside soil mass and testing method
  • Device for testing three-dimensional strain state inside soil mass and testing method
  • Device for testing three-dimensional strain state inside soil mass and testing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] specific implementation

[0019] A device and testing method for testing the three-dimensional strain state inside the soil mass according to the present invention will be described in detail with reference to the accompanying drawings.

[0020] The structure of the device for testing the three-dimensional strain state inside the soil body of the present invention is that the device includes a rhombic dodecahedron 1, six strain gauges 2, a measuring wire 3, a face-centered wire hole 4, a wire collection hole 5, and a strain gauge Base 6: Fix the six strain gauges 2 on the strain gauge base 6 on the six normal vector irrelevant surfaces of the rhombic dodecahedron 1, wherein the strain gauge base adopts a material whose elastic modulus is smaller than that of the soil to be measured. The measuring wires 3 of six ordinary strain gauges are derived from the centroid wire summary hole 5 of the rhombic dodecahedron through the face-centered wire hole 4 and then connected wit...

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 provides a device for testing a three-dimensional strain state inside a soil mass. Six common strain gauges of the device are sequentially fixed onto strain gauge bases on six surfaces with uncorrelated normal vectors of a rhombic dodecahedron, and lead holes leading to the center of the rhombic dodecahedron are formed in centers of the six surfaces with the uncorrelated normal vectors of the rhombic dodecahedron and connected with a data acquisition system through measuring leads. Besides, the invention further provides a testing method of the device for testing the three-dimensional strain state inside the soil mass. The device has the advantages that the three-dimensional strain state of a certain position of the soil mass is more accurately tested, linear strain in a maximum main strain direction can be obtained, among six strain gauge testing values, testing precision of three main strain gauges is 1.22 rho, testing precision of three shearing strain gauges is 0.71 rho, average testing precision is 0.97 rho, strain gauge testing precision in a single direction is improved, and the limitation of only testing surface strain at inaccurate testing positions in the past is changed. The device visually reflects the deformation state inside the soil mass, and safety stock of engineering construction is improved.

Description

technical field [0001] The invention belongs to the technical field of deformation and strain testing in engineering, and specifically relates to a device and a testing method for testing the three-dimensional strain state inside the soil, through which the six normal vectors on the rhombic dodecahedron are obtained. The linear strain can be calculated to obtain the three-dimensional strain state of the test soil. Background technique [0002] Deformation and strain testing of objects is a basic work in civil engineering, water conservancy engineering and traffic engineering. It is the prerequisite for engineering health diagnosis and quantitative mechanical analysis. In-depth understanding of the mechanical properties of materials, the study of soil stress and strain, and an accurate understanding of its stress state and working conditions are the key to quality assessment and reinforcement maintenance in engineering construction. [0003] In general, the unidirectional s...

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): G01B7/16
CPCG01B7/18
Inventor 李顺群潘林娜王彦洋柴寿喜郭林坪张彦冯彦芳
Owner TIANJIN CHENGJIAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap