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Large-size reinforced soil shear strength testing equipment, and testing method

A technology of shear strength and testing equipment, applied in the field of geotechnical engineering, can solve problems such as easy concentration of stress on the boundary of the shear box and too small sample size

Pending Publication Date: 2021-03-19
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

In order to overcome the technical problems of the traditional direct shear equipment, such as too small sample size and easy concentration of stress on the boundary of the shear box, so as to obtain unrepresentative test results, a large-scale reinforced soil shear strength testing equipment is needed

Method used

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  • Large-size reinforced soil shear strength testing equipment, and testing method
  • Large-size reinforced soil shear strength testing equipment, and testing method
  • Large-size reinforced soil shear strength testing equipment, and testing method

Examples

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Embodiment 2

[0116] This embodiment provides a method for carrying out a large-scale direct shear test of reinforced soil using the equipment of Embodiment 1, comprising the following steps:

[0117] Step 1. Sample preparation, which specifically includes: mixing loess and fiber according to a preset ratio, mixing well, and dividing them into three parts on average to obtain soil samples;

[0118] Step 2, sample loading, specifically includes: select the upper box body and the lower box body of the appropriate size according to the test needs, and select the upper peripheral parts and the lower box body of the appropriate height according to the reserved distance of 1mm to 2mm between the upper box body and the lower box body For peripheral parts, place the lower box body in the inner cavity of the lower periphery, place the upper box body in the inner cavity of the upper periphery and set the lap joint plate 1-1 on the side wall 5-2 of the upper peripheral part, and use bolts and nuts to c...

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Abstract

The invention discloses large-size reinforced soil shear strength testing equipment, and a testing method. The large-size reinforced soil shear strength testing equipment comprises a control unit, a pressure loading unit and a shear box assembly; the control unit comprises an industrial computer A, a normal force motor, a horizontal force motor, a microcomputer control system, a normal force loading driving device, a horizontal force loading driving device, a normal force motor driving device and a horizontal force motor driving device; the pressure loading unit comprises a base, a slide way,a normal force loading shaft rod and a horizontal force loading shaft rod, and an outer blocking piece is arranged on the slide way; and the shearing box assembly is arranged in the outer blocking piece. In addition, the invention also provides a testing method adopting the equipment. The equipment can realize a large-size direct shear test of reinforced soil and obtain a comprehensive evaluationresult of a large-size soil sample shear strength test, has the advantages of reasonable evaluation parameters, high accuracy and high efficiency, and can meet the requirements of a multi-parameter complex test scheme.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a test device and a test method for the shear strength of large-scale reinforced soil. Background technique [0002] The sliding of slope rock and soil along the through shear failure surface causes damage to people, animals and houses. The mechanism is that the shear stress on a certain slip surface exceeds the shear strength of the surface, and the reinforcement Soil can play a positive role in the prevention and control of landslides, and the reinforcing materials that can be used include wheat straw, palm, grass roots, etc. The direct shear test is a fast and economical method for the shear strength test of rock and soil samples. The size of the direct shear sample in the national geotechnical test standard is: 61.8mm in diameter and 20mm in height. The direct shear test of soil samples is carried out according to the national standard There are ...

Claims

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Application Information

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IPC IPC(8): G01N3/24G01N3/02
CPCG01N3/24G01N3/02Y02P90/02
Inventor 郑文杰薛中飞王琳
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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