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Frozen soil-structure direct shear apparatus and use method thereof

A technology of direct shear instrument and frozen soil, which is applied in the direction of testing the strength of materials and the preparation of samples for testing by applying stable shear force

Active Publication Date: 2011-11-23
JIANGSU JIANKE PROJECT MANAGEMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] It has not been reported that the direct shear instrument is directly used in the study of the mechanical behavior of the frozen soil-structure interface.

Method used

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  • Frozen soil-structure direct shear apparatus and use method thereof
  • Frozen soil-structure direct shear apparatus and use method thereof

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Experimental program
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Effect test

Embodiment

[0021] Bracket dimensions: length 750×height 860×width 250mm, horizontal platform 17 dimensions: length 750×width 250mm. There are wheels on the bottom of the stand for easy movement.

[0022] The shear box system is located in the middle of the horizontal support platform 17, and consists of two parts, the upper shear box 6 and the lower shear box 8, the specific positions are as follows figure 1 shown. The outer sides of the upper shear box and the lower shear box are attached with thermal insulation materials. The volume of the upper shear box is 120mm long x 70mm wide x 30mm high, which can easily replace structural materials to simulate various structural surfaces that may be encountered in the engineering field, such as concrete and metal. The lower shear box is used to place soil samples, the mold volume is 100mm long x 60mm wide x 40mm high, and the shear area of ​​the sample is 100mm x 60mm. The bottom of the lower shear box 8 is a closed semiconductor refrigeratio...

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Abstract

The invention discloses a frozen soil-structure direct shear apparatus and a use method thereof. The frozen soil-structure direct shear apparatus comprises a horizontal thruster, a stepping motor, a displacement sensor, a vertical pressure dowel bar, a horizontal ball guide rail, an upper shearing box, a thermocouple, a lower shearing box, a semiconductor refrigeration block, a load sensor, a horizontal end fixing device, a cooling liquid delivery pipe, a low temperature thermostatic bath, a strain rate controller, counterbalance weights, a lever end fixing device, a horizontal bearing platform, a lever and weights. The frozen soil-structure direct shear apparatus has the advantage of being suitable for the research on the mechanical characteristics of the contact surface of different materials at a low temperature. The apparatus can provide different normal stress and temperatures for the contact surface of the materials according to test requirements; and when the freeze condition of the contact surface of the different materials meets the corresponding requirements, a shear force is applied on the contact surface at a selected shear rate until the contact surface of the sample is subjected to damage, and the relation curve of the shear stress of the frozen soil-structure contact surface and the shear displacement is determined.

Description

technical field [0001] The invention relates to a frozen soil-structure direct shear instrument used in the study of the mechanical behavior of the frozen soil-structure interface and a method for using the same. The utility model belongs to the technical field of frozen soil-structure indoor model test instruments. technical background [0002] The direct application of the direct shear instrument in the study of the mechanical behavior of the frozen soil-structure interface has not been reported so far. Contents of the invention [0003] What the present invention proposes is a kind of frozen soil-structure direct shear instrument and its use method, and its purpose is to further study the mechanical characteristics of frozen soil-structure contact surface, establish frozen soil-structure contact surface The relationship curve and related parameters are used to discuss the basic strength index, constitutive relationship and change law of the mechanical properties of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24G01N1/28
Inventor 杨平陈红斌王海波何文龙赵联桢
Owner JIANGSU JIANKE PROJECT MANAGEMENT
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