Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Direct shear test data acquisition instrument for big visual model of reinforced earth

A large model, reinforced soil technology, applied in the direction of applying stable shear force to test the strength of materials, instruments, scientific instruments, etc., can solve the influence of the boundary effect of the interface interaction between reinforcement and soil, stress concentration, and easy to produce human errors and other issues, to achieve the effect of increasing the operable shear displacement, improving the reliability and reducing the stress concentration

Active Publication Date: 2014-12-10
GUANGXI UNIVERSITY OF TECHNOLOGY
View PDF12 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The size of the geotechnical box in the test instrument is generally relatively small, the test will be limited by the size effect of the indoor model, and the research on the interaction between the reinforcement-soil interface will inevitably be affected by the boundary effect;
[0004] (2) The shear stress distribution on the shear plane is uneven, and the shear failure of the soil sample starts from the edge first, and stress concentration occurs at the edge
[0007] (5) Sand particles are easily embedded in the gap between the upper and lower shear boxes of the existing shear box, which makes the test result too large;
[0009] (7) Existing test equipment can only obtain the macroscopic mechanical response of the interfacial interaction between reinforcement and soil, but cannot ascertain the evolution law of the mesoscopic fabric of sand and soil at the interface during the interaction of reinforcement and soil, so it is also impossible to reveal the reinforcement from the granular medium level. The mesomechanical nature of soil interface interaction;
[0010] (8) There are also many defects in the reading, recording and processing of test data, which are prone to human errors and cannot obtain accurate 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
  • Direct shear test data acquisition instrument for big visual model of reinforced earth
  • Direct shear test data acquisition instrument for big visual model of reinforced earth
  • Direct shear test data acquisition instrument for big visual model of reinforced earth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034]A visual large-scale model direct shear test data acquisition instrument for reinforced soil, including a vertical loading system, a horizontal loading system, a shear box 1, a console 8 and a place for placing the vertical loading system, the horizontal loading system, and the shear box 1 The load-bearing platform 9 of the test equipment, the bottom of the load-bearing platform is provided with a foot support 10, the integrated electric board and the control panel are arranged in the described console 8, and the described shear box 1 includes a Upper shearing box 11 and lower shearing box 12, described upper shearing box 11 is placed on the lower shearing box 12, and described filler can be geotechnical fillers such as gravel, sandy soil, cohesive soil, and described upper The shear box 11 and the lower shear box 12 are all steel shear boxes made of steel material. Before the test, the contact surfaces of the upper shear box 11 and the lower shear box 12 can be smeared w...

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
The inside diameter ofaaaaaaaaaa
The inside diameter ofaaaaaaaaaa
Login to View More

Abstract

The invention relates to a direct shear test data acquisition instrument for a big visual model of reinforced earth. The direct shear test data acquisition instrument comprises a vertical loading system, a horizontal loading system and a shear box, wherein the shear box comprises an upper shear box and a lower shear box which are both filled with packing; the horizontal loading system comprises a push-pull electromotor and a sliding balanced pushing rod, and a displacement sensor and a pressure sensor are mounted on the push-pull electromotor; one end of the sliding balanced pushing rod is connected with the push-pull electromotor, and the other end of the sliding balanced pushing rod is connected with the lower shear box; a counterforce device is mounted on one side, far away from the sliding balanced pushing rod, of the lower shear box and connected with the upper shear box; transparent tempered glass is arranged on one side wall of the upper shear box in the shear direction, and a digital video camera is mounted in front of the tempered glass; a geotechnical material spring clip is mounted at one end of the lower shear box. The direct shear test data acquisition instrument is convenient to use, small in test error, precise test data and convenient to widely promote and use.

Description

technical field [0001] The invention relates to a direct shear test device, in particular to a data acquisition instrument for a large-scale visualized direct shear test of reinforced soil. Background technique [0002] With the wide application of reinforced soil technology, it is urgent to accurately measure the shear strength of the reinforced soil direct shear interface. The direct shear test is a common method to measure the shear strength of the reinforced soil interface. The principle of the test is that according to Coulomb's law, the shear strength of the reinforcement-soil interface is proportional to the normal pressure on the shear plane. Although the direct shear test equipment has been developed in recent years, it still has the following deficiencies: [0003] (1) The size of the geotechnical box in the test instrument is generally relatively small, the test will be limited by the size effect of the indoor model, and the research on the interaction between th...

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): G01N3/24G01N3/02
Inventor 王家全周岳富吴辉琴
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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
Eureka Blog
Learn More
PatSnap group products