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Earth-rock aggregate direct shear relaxation test device and test method

A soil-rock mixture and relaxation test technology, which is applied in the direction of using stable shear force to test the strength of materials, etc., can solve the problems of equipment without relaxation test, different test principles, and difficulty in relaxation test, etc., and achieve simple device manufacturing , high degree of automation and simple operation

Active Publication Date: 2017-04-05
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Due to the difficulty of the relaxation test, it is relatively difficult to require the test device to have the precision to keep the strain absolutely constant.
At present, there are many equipments used for creep test, but there is no equipment specially used for relaxation test, and the principles and forms of creep and relaxation are different, so the principles of the test are also different.
Therefore, equipment for creep tests cannot be directly used for relaxation tests

Method used

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  • Earth-rock aggregate direct shear relaxation test device and test method
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Embodiment Construction

[0035] A direct shear relaxation test device for soil-rock mixture proposed by the present invention and its working method will be described in detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "left", "right", "upper", "lower", "bottom" etc. is based on the orientation or positional relationship shown in the drawings The positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, "first", "second", etc. It does not indicate the importance of components, so it should not be construed as limiting the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, a...

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Abstract

The invention discloses an earth-rock aggregate direct shear relaxation test device and test method. The device comprises a direct shearing box seat, a direct shearing box, a displacement sensor, a first force sensor, a second force sensor, a strain stress control pushing device, a heading seat, a separator plate, a base plate, a linear slide rail, a rectangular motor and a normal loading device. The method comprises sample pressing, stress change acquisition and strain constant maintenance processes. The device and the method have the advantages of high measurement precision, meeting of constant strain requirements of direct shear relaxation test through strain-controlled loading, convenience in test, and high result accuracy.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering testing, in particular to a direct shear relaxation test device and a test method for soil-rock mixture. Background technique [0002] Soil-rock mixture is a special geological body, which is a mixture of soil and rocks. The particle size of the rocks ranges from a few centimeters to several meters, and some even exceed tens of meters. Because the physical and mechanical properties of the "rocks" and "soil" that make up this kind of rock-soil medium are very different, the structure is disorderly, the sorting is poor, the intergranular binding force is poor, and the water permeability is strong. The characteristics are very different from ordinary soil or rock (stone), and cannot be simply superimposed by blocks of stone or soil. As a filler, earth-rock mixture is widely used in construction projects such as earth-rock dams, roads, railways, airports, and house foundations, and i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24
CPCG01N3/24
Inventor 张丹陈晓雪李博季婷媛王嘉诚丁大勇
Owner NANJING UNIV
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