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Nested multifunctional shear test device and test method

A shear test, multi-functional technology, applied in the field of soil shear test, geotechnical material shear test, telescopic multi-function shear test device, can solve shear test, single shape and single size soil Shear test, inconvenience and other problems, to achieve the effect of convenient shear shape and contact shape

Active Publication Date: 2020-11-24
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) Existing shearing devices can only realize single-sided shear test of soil samples or geotechnical materials, or can only realize double-sided shear tests of geotechnical materials, and there is no single-sided shear test of soil samples and geotechnical materials at present Versatile shear tester for both test and double-sided shear tests
[0005] 2) The existing shearing device can only perform a single-shape and single-size soil shear test, and cannot perform shear tests on soils with different volumes and different shapes of shear surfaces, nor can it change the performance of geotechnical materials in the shear test. The contact area and shape of the medium and soil
It is very inconvenient to use another set of shearing devices with different sizes for shear tests of soil samples of different volumes

Method used

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  • Nested multifunctional shear test device and test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A circle with a diameter of 15cm is used as the shear plane, and the fine sand soil sample is used as the direct shear test, so as to introduce a method of using the telescopic multifunctional shear box. The method includes the following steps:

[0063] a) The shearing boxes used in the test are all of outer square inner circle structure, the outer side length is 30.5cm, and the inner diameter is 28cm. In the lower shearing box, a cylindrical sleeve with an outer diameter of 28cm and an inner diameter of 25cm is placed in turn. 1. Outer diameter Cylindrical sleeve 2 with an inner diameter of 25 cm and an inner diameter of 20 cm, and a cylindrical sleeve with an outer diameter of 20 cm and an inner diameter of 15 cm. Fill a hollow cylinder with an inner diameter of 15 cm with fine sand and soil samples, and place the lower shear box On the ball track of the rigid bottom plate, no movable baffle is installed, so that the lower shear box can slide along the shear direction;...

Embodiment 2

[0069] Taking a circle with a diameter of 20cm as the shear plane, a single-sided contact cyclic shear test between a geomembrane with a thickness of 1mm and a gravel soil sample is used as an example to introduce a method of using a nested multifunctional shear box. Include the following steps:

[0070] a) The outer side length of the shearing box used for the test is 30.5cm, and the inner diameter is 28cm. In the lower shearing box, a cylindrical sleeve with an outer diameter of 28cm and an inner diameter of 25cm is placed one by one, a cylinder with an outer diameter of 25cm and an inner diameter of 20cm Sleeve 2, a cylindrical sleeve with an outer diameter of 20cm and an inner diameter of 15cm 3, a cylindrical sleeve with an outer diameter of 15cm and an inner diameter of 10cm 4, a cylindrical sleeve with an outer diameter of 10cm and an inner diameter of 5cm Place a solid cylinder with an outer diameter of 5cm inside, place the lower shear box on the ball track of the rig...

Embodiment 3

[0077] Taking a circle with a diameter of 25cm as the shear contact surface, a double-sided contact cyclic shear test between a geomembrane with a thickness of 1mm and sandy gravel and fine sand soil samples is used as an example to introduce a method of using a telescopic multifunctional shear box , the method includes the following steps:

[0078] a) The outer side length of the test shear box is 30.5cm, and the inner diameter is 28cm. A cylindrical sleeve with an outer diameter of 28cm and an inner diameter of 25cm is placed in the lower shear box, and a hollow cylinder with an inner diameter of 25cm is filled with fine sand and soil samples , flat and uniform soil sample, compacted to the design density; place the lower shear box on the ball track of the rigid bottom plate, insert the long side of the movable baffle into the deep groove and screw the detachable baffle and the lower shear box Fixed so that the lower shear box can never slide along the shear direction;

[0...

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Abstract

The invention discloses a nested multifunctional shear test device and a test method. The device is matched with a plurality of cylindrical sleeves which have different sizes, can be placed in a seamless nesting manner and have outer circle and inner circle structures, a plurality of cylindrical sleeves which have different sizes and have outer circle and inner square structures, and a plurality of force transmission plates matched with the cylindrical sleeves. According to the invention, cylindrical sleeves which can be nested are arranged in the upper and lower shearing boxes in a matched manner, so that the shearing area of a soil sample shearing test or the contact area of soil and a geomembrane sample in a geomembrane shearing test is changed; by controlling the detachable baffle andthe baffle and changing the shearing mode, not only can a direct shearing test of soil and a one-way shearing test of a geomembrane be carried out, but also a two-way shearing test of the geomembranecan be carried out.

Description

technical field [0001] The invention relates to a nested multifunctional shearing test device, which belongs to the technical field of material performance testing, in particular to the shearing test of soil and the shearing test of geotechnical materials. Background technique [0002] The application number is 201810089241.6, and the name of the invention is a flexible tensile geomembrane and soil double-sided contact cyclic shear test device and test method, which can perform double-sided shearing of the geomembrane. The cutting box does not move, and the cutting box is moved to produce double-sided shearing between the geomembrane and the soil sample. The lower shear box and the rigid base plate of the test device are connected by consolidation, so the relative displacement between the upper and lower shear boxes cannot be caused, and the direct shear test of soil samples and the single-sided shear test of geomembrane cannot be carried out. [0003] There are following p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/32
CPCG01N3/32G01N2203/0005G01N2203/0025
Inventor 王梦漪岑威钧王力波闫志远温家宣
Owner HOHAI UNIV
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