Large contact surface characteristic direct shear apparatus with cycle loading function

A technology of direct shearing instrument and interface characteristics, applied in the field of shear plane or variable shear plane test, can solve the problems of inability to simulate shear friction characteristics, low level of automation, and reduce the scope of application of shearing instrument, and achieve drawing display. Accurate and efficient, improve processing efficiency, convenient storage and recording effect

Active Publication Date: 2012-07-25
WENZHOU UNIVERSITY
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Problems solved by technology

[0005] Although the above-mentioned direct shear instrument has some improvements compared with the traditional instrument, it still cannot meet the requirements of more realistic simulation of the friction characteristics of the reinforcement-soil interface in engineering practice.
There are some problems: the size of the upper and lower shear boxes is fixed (the same size or different) and relevant comparative tests cannot be carried out; th...

Method used

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  • Large contact surface characteristic direct shear apparatus with cycle loading function
  • Large contact surface characteristic direct shear apparatus with cycle loading function
  • Large contact surface characteristic direct shear apparatus with cycle loading function

Examples

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example 1

[0028] Example 1, the present invention is a large-scale interface direct shear instrument under cyclic loading.

[0029] See figure 1As shown, its main components include frame structure 1, vertical load application part 2, vertical LVDT displacement sensor 3, upper shear box 6, lower shear box 7, upper shear box fixing bracket 8, water bath box 9, vertical To the pressure loading plate 10 , the horizontal load applying part 4 , the horizontal LVDT displacement sensor 5 and the bottom support device 11 , it also includes an external control device 13 .

[0030] See figure 2 As shown, it mainly includes an overall frame structure 1 , upper and lower shear boxes 6 , 7 and an airborne control panel 12 for vertical and horizontal loads.

[0031] image 3 Shown is mainly the vertical load applying device of the equipment of the present invention, which is composed of a servo motor, which can apply cyclic loads of different frequencies and amplitudes, and provides support for t...

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Abstract

The invention relates to a large contact surface characteristic direct shear apparatus with cycle loading function, in particular to a novel large direct shear apparatus for researching the interface frictional characteristics between soils, between geo-synthetic and soil or between geo-synthetics, wherein the apparatus is applied for the equal shear surface test or variable shear surface test between optional two materials, and the direct shear apparatus is particularly applied for performing the interface characteristic test research under the functions of vertical cycle loading and horizontal cycle loading.

Description

technical field [0001] The invention relates to a new type of large-scale direct shear instrument for studying the interface friction characteristics between soil bodies and between geosynthetic materials and soil bodies or between geosynthetic materials. Shear surface test; in particular, the interface characteristic test research under the action of vertical and horizontal cyclic loads can be carried out, which is the key innovation of the present invention. Background technique [0002] In civil engineering, especially geotechnical engineering, reinforced soil structures such as reinforced soil subgrades, reinforced soil retaining wall structures, reinforced slope structures, etc. are usually encountered. Another example is that in a water conservancy dam project, the contact surface between the concrete dam and the soil has a large initial internal shear stress and displacement discontinuity due to the difference between the two materials, so the contact surface is the s...

Claims

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Application Information

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IPC IPC(8): G01N3/24G01N3/32
Inventor 王军蔡袁强林旭熊焕丁光亚胡秀青
Owner WENZHOU UNIVERSITY
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