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An observation test device for torsional shear strength and deformation of soil cylindrical samples

A cylindrical sample and test device technology, applied in the measurement device, using a stable torsion force to test the material strength, using a stable shear force to test the material strength, etc. Deformation and other problems, to achieve the effect of reducing errors, reducing disturbance, and reducing mechanical friction

Active Publication Date: 2017-10-17
XIAN CHANGQING TECH ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to overcome that existing test equipment can not be well adapted to the original state of pure torsional shear stress path or the mensuration of the torsional shear strength of remodeled soil and the microscopic structural deformation of the whole loading process, and control and measurement etc. are artificial in the test Factors affecting the problem

Method used

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  • An observation test device for torsional shear strength and deformation of soil cylindrical samples
  • An observation test device for torsional shear strength and deformation of soil cylindrical samples
  • An observation test device for torsional shear strength and deformation of soil cylindrical samples

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Embodiment 1

[0043] In order to overcome the fact that the existing test equipment is not suitable for the determination of the torsional shear strength of the original or remodeled soil in the pure torsional shear stress path and the microstructure deformation during the entire loading process, and the human factors such as control and measurement in the test are greatly affected problem, this embodiment provides a method such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 The shown torsional shear strength and deformation observation test device of a cylindrical soil sample includes a base 1 and a box 2 installed on the base 1, the upper surface of the box 2 is a working platform 3, and on the working platform 3 The middle support column 5 is installed on the edge of the surface, and the base lifting regulator 29 is fixed in the middle of the upper surface of the working platform 3, and the lower transmission...

Embodiment 2

[0054] On the basis of embodiment 1, a plurality of rollers 31 are installed under the base 1, and the rollers 31 have a self-locking anti-skid function. The test device is pushed to a suitable place, so that the laboratory space can be rationally used and damage to the test device can be avoided.

[0055]In order to make the sealing performance of the confining pressure chamber better and the measurement accuracy high, a sealing rubber ring 54 is arranged between the confining pressure chamber cover 46 and the connecting shaft 48, Two sealing rubber rings 55 are provided.

[0056] A screw 42 is arranged on the side wall of the positioning holder 41 , tightening the screw 42 can lock the connecting shaft 48 , and loosening the screw 42 can make the connecting shaft 48 move freely.

[0057] In order to facilitate the operation of the staff, the side wall of the torque motor 11 is provided with a hand wheel 12, and the side wall of the base lifting regulator 29 is provided with...

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Abstract

The present invention specifically provides a torsional-shear strength and deformation observation test device for cylindrical soil samples. The overall structure includes a main body, a three-dimensional imaging scanning mechanism, a confining pressure loading and measuring mechanism, a torque loading and measuring mechanism, and an upper end of a torque sensor. Fixing mechanism, sample fixing and installation mechanism, lubrication mechanism. The 3D imaging scanner can record and collect the 3D image of the sample during the test; the confining pressure application method of air pressure transmission pressure and the new volume change measurement method simplify the test steps and have significant advantages in the volume change measurement of soil samples. Change; rely on the transmission chain connecting the torque output shaft and the upper transmission shaft to transmit torque, and use a torque sensor, a torque indicator, an absolute angular displacement sensor, and an angular displacement indicator on the upper transmission shaft at the same time; the matching sample fixing clip The holding structure has changed significantly in the fixed installation of the sample. The invention has the advantages of simple structure, low cost, convenient operation, high accuracy rate and success rate.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering testing, and in particular relates to a torsional shear strength and deformation observation test device for a soil cylindrical sample, which is used for the measurement of the torsional shear strength of soil in a geotechnical chamber and the test for observing the deformation of microscopic structures. Background technique [0002] Soil is the product of the evolution process of geological processes, and it is a multi-phase dispersion system with the characteristics of diversity in types, complexity and variability in properties. The same type of soil, different types of instruments can measure different results, and similar instruments, different test methods and techniques will also produce large differences. In geotechnical tests, the test errors of mechanical parameters are often larger than the errors caused by different calculation methods. This is why people persevere in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/22G01N3/24G01N3/12G01N3/06
Inventor 王治军骆建文李荣建杜志伟刘军定刘斌潘俊义周鹏苏健杨鹏
Owner XIAN CHANGQING TECH ENG
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