Unsaturated rock-soil material stress permeability measuring instrument

A technology of geotechnical materials and measuring instruments, which is applied in suspension and porous material analysis, measuring devices, permeability/surface area analysis, etc.

Active Publication Date: 2014-03-19
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, there is currently no unsaturated geotechnical material stress-permeability measuring instrument retrieved in the existing literature, which simultaneously performs unsaturated infiltration measurement and moisture tracking measurement equipment under different stress conditions

Method used

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  • Unsaturated rock-soil material stress permeability measuring instrument
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  • Unsaturated rock-soil material stress permeability measuring instrument

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Embodiment 1

[0028] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0029] An unsaturated rock and soil material stress penetration measuring instrument ( figure 1 ), including loading platform 1 ( figure 2 ), servo loading pump 11, saturated saline solution 12, airtight container 14, mass sensor 15, temperature and humidity sensor 16, and data acquisition system 18. The data acquisition system 18 is respectively connected with the servo loading pump 11, the mass sensor 15, the temperature and humidity sensor 16 and the strain gauge 17, the mass sensor 15 is placed outside the airtight container 14, the mass sensor 15 is connected to one end of the connecting hook 5, and the other end of the connecting hook 5 Through the small hole I on the airtight container 14, it is connected to the center of the upper stress pad 2 of the loading platform 1, and the lower pressure pad 3 of the loading platform 1 is connected to the outlet of the ...

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Abstract

The invention discloses an unsaturated rock-soil material stress permeability measuring instrument. A data acquisition system is connected with a servo loading pump, a mass sensor, a temperature-humidity sensor and a strain gauge respectively; the mass sensor is arranged outside a closed container and connected with a connecting hook; the other end of the connecting hook penetrates through a small hole in the closed container and is connected with a stressed cushion block at the upper part of a loading platform; a stressing cushion block at the lower part of the loading platform is connected with the outlet of the servo loading pump; the outlet of the servo loading pump penetrates through the small hole in the closed container and is connected with a servo pressure pump; the servo pressure pump is arranged outside the closed container; the strain gauge and the temperature-humidity sensor respectively penetrate through the small hole in the closed container; a vessel containing a saturated salt solution is arranged inside the closed container. The stress permeability measuring instrument is simple in structure, convenient to use, complete in functions, high in measuring precision, and capable of realizing tracking measurement on deformation and mass of unsaturated drying and wetting processes with different stress levels and determining the mechanical parameters of materials with different saturated degrees, thereby being very suitable for research on unsaturated soil mechanics.

Description

technical field [0001] The invention relates to the technical field of experimental measuring instruments, and more specifically relates to a stress-penetration measuring instrument for unsaturated rock-soil materials, which provides a synchronous and accurate measuring device for determining parameters such as deformation, mechanics, and permeability of unsaturated rock-soil media. Background technique [0002] The problem of unsaturation is one of the important issues in geotechnical engineering. Many geotechnical engineering disasters are closely related to the unsaturated characteristics of materials. Due to seasonal and periodic changes in humidity, a large number of cracks are produced in the surrounding rock, which weakens the mechanical and hydraulic properties and poses a danger to engineering safety. At present, the development of unsaturated soil mechanics testing technology is slower than that of saturated soil mechanics. [0003] Unsaturated soil mechanics test...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N5/02
Inventor 杨典森陈卫忠
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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