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Device and method for preparing undisturbed soil sample for ring shear test

A soil sample preparation, undisturbed technology, applied in the fields of geotechnical engineering and soil mechanics, can solve the problems of the device without taking undisturbed soil, affecting and destroying the natural structure, porosity or moisture content of the soil sample, so as to meet the actual engineering needs. , reduce disturbance, reduce the effect of resistance increase

Active Publication Date: 2020-05-26
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the sample preparation of the ring shear test, the samples made so far are disturbed soil, which destroys the natural structure, porosity or water content of the soil sample, and has a certain impact on the accuracy of the residual strength test of the soil sample. There is no matching device for taking undisturbed soil

Method used

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  • Device and method for preparing undisturbed soil sample for ring shear test
  • Device and method for preparing undisturbed soil sample for ring shear test
  • Device and method for preparing undisturbed soil sample for ring shear test

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: as Figure 1~3 Among them, a ring shear test undisturbed soil sample sample preparation device, including a force transmission device, an inner ring knife 1, an outer ring knife 2 and a sampling device, the height of the inner ring knife 1 and the outer ring knife 2 are the same;

[0029] The force transmission device includes a load-bearing platform 3, a number of internal dowel bars 4, a number of external dowel bars 5 and a force transmission chassis 6. The lower end of the force transmission chassis 6 is provided with an inner limit ring groove 601 and an outer limit ring groove concentrically arranged. The position ring groove 602, the upper ends of the inner ring knife 1 and the outer ring knife 2 are respectively arranged in the inner limit ring groove 601 and the outer limit ring groove 602, and the groove depths of the inner limit ring groove 601 and the outer limit ring groove 602 are the same , to ensure that the upper end faces of the inner rin...

Embodiment 2

[0046] Embodiment 2: Different from Embodiment 1, the force transmission chassis 6 includes an inner force transmission ring 603 and an outer force transmission ring 604 arranged concentrically, and an inner limit ring groove 601 and an outer limit ring groove 602 are respectively set The lower end of the force ring 603 and the external force ring 604.

[0047] The inner limit ring groove 601 is an "L"-shaped groove opened along the outer wall of the inner force transmission ring 603, and the outer limit ring groove 602 is an "L"-shaped groove opened along the inner wall of the outer force transmission ring 604. The inner limit ring The groove bottom width of the groove 601 is equal to the thickness of the inner ring cutter 1 , and the groove bottom width of the outer limiting ring groove 602 is equal to the thickness of the outer ring cutter 2 .

[0048] With the above structure, when preparing samples, the outer wall of the inner ring knife 1 is aligned with the outer wall o...

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Abstract

The invention provides a ring shear test undisturbed soil sample preparation device, and a method. The ring shear test undisturbed soil sample preparation device comprises a force transmission device,an internal cutting ring, an external cutting ring, and a sampling device; the force transmission device comprises a bearing platform, a plurality of internal force transmission rods, a plurality ofexternal force transmission rods, and a force transmission bottom disc; the lower end of the force transmission bottom disc is provided with an internal limit circular groove and an external limit circular groove which are concentric with each other; the upper end of the internal cutting ring is arranged in the internal limit circular groove; the upper end of the external cutting ring is arrangedin the external limit circular groove; the internal force transmission rods and the external force transmission rods are arranged between the bearing platform and the force transmission bottom disc; the connection parts of the internal force transmission rods with the force transmission bottom disc are on the upper part of the internal limit circular groove; the connection of the external force transmission rods with the force transmission bottom disc are on the upper part of the external limit circular groove; the sampling device comprises a pedestal, a middle ring soil pressing plate, and anannular soil pressing plate. The ring shear test undisturbed soil sample preparation device and the method are convenient for preparation of annular undisturbed soil samples used for ring shear tests, and no disturbance is caused on soil samples.

Description

technical field [0001] The invention relates to the fields of geotechnical engineering and soil mechanics, in particular to a device and method for preparing undisturbed soil samples for ring shear tests. Background technique [0002] In the field of geotechnical engineering and soil mechanics, the ring shear test is one of the torsional shear tests, which is used to study the shear resistance of the soil under large deformation, and can better measure the residual strength of the soil, and then explore the impact of the soil. Variation law of strength attenuation after failure. For the sample preparation of the ring shear test, the samples made so far are disturbed soil, which destroys the natural structure, porosity or water content of the soil sample, and has a certain impact on the accuracy of the residual strength test of the soil sample. There is no matching device for getting undisturbed soil. Contents of the invention [0003] The technical problem to be solved b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/08G01N1/28
CPCG01N1/08G01N1/28
Inventor 胡学文张国栋谢强
Owner CHINA THREE GORGES UNIV
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