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High pressure solid clay pervasion test device

A technique of penetration testing and high-pressure compaction, which is applied in measuring devices, soil testing, permeability/surface area analysis, etc., to achieve good versatility, convenient operation and easy realization

Inactive Publication Date: 2008-11-12
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no recognized device that can accurately and quickly measure the permeability coefficient

Method used

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  • High pressure solid clay pervasion test device
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  • High pressure solid clay pervasion test device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: see attached Figure 1-8 .

[0046] A high compacted clay penetration testing device, comprising:

[0047] A pressurizing device nitrogen cylinder 1 with a pressure indicating gauge 2;

[0048] A high-pressure water tank 3, the top surface of the high-pressure water tank 3 has an air inlet 10 and a water outlet 11;

[0049]A permeameter; the permeameter consists of: a central hole 15 fixedly connected with an injection needle 6 (the structure is the same as a medical injection needle), a base 8 with two uniformly distributed bolt holes 16, a central hole 17, and two uniform Bolt holes 18 corresponding to the positions of the bolt holes 16, the outer cylinder 4 superimposed on the bottom surface and the top surface of the base 8 have water inlet holes 19, and two evenly distributed bolt holes 20 corresponding to the positions of the bolt holes 18 are arranged on the upper end. The piston 9 in the lower section is socketed in the center hole 17 of the out...

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Abstract

The invention discloses a high compact clay permeability testing device, characterized by comprising a nitrogen tank with a pressure indicating gauge; a high pressure water can with an air intake and a group of water outtakes; a permeameter consisting of a base equipped with a center hole and a bolt hole and fixed with a needle, an outer tube equipped with a center hole, a bolt hole,with the bottom surface superimposed with a top surface of the base, a piston equipped with a water intake with the lower segment sleeved in the center hole of the outer tube, and a bolt; an air conduit with one end communicating with the air outtake of the nitrogen tank and the other end communicating with the air intake of the high pressure water can; a discharging tube with one end communicating with the water intake of the piston and the other end communicating with the water outtake of the high pressure water can; and a water collecting tank communicating at the lower end of the needle. The invention has simple structure, short measurement test period, high precision, capable of measuring any medium with the permeability coefficient smaller than 10<-9> cm / s, particularly suitable for the test of the high compact clay filter performance.

Description

technical field [0001] The invention belongs to a device for testing the permeability of granular materials, and relates to a high-compacted clay penetration test device. The device is especially suitable for high compacted clay and permeability coefficient less than 10 -9 Penetration testing of any medium in cm / s. Background technique [0002] The permeability of soil is the ease with which free water flows through the soil. It is an important property of soil. The permeability coefficient reflects the permeability of the soil and is one of the important physical properties of the soil. Its measurement method is called the permeability test. Indoor permeability test methods include constant head method and variable head method. The constant head penetration test is suitable for coarse-grained soils, and the variable head penetration test is suitable for fine-grained soils. It is difficult to accurately measure the permeability coefficient of high-compacted clay, which ...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N33/24
Inventor 易发成侯莉王哲
Owner SOUTHWEAT UNIV OF SCI & TECH
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