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Rapid penetration test device for low permeability media

A low-permeability, medium technology, applied in the direction of measuring devices, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problem of small variation range of water head difference, easy error of water head difference, and poor consideration of temperature changes, etc. problems, to achieve the effect of simple structure, shortened measurement time, simple and fast operation

Active Publication Date: 2020-01-31
POWERCHINA HUADONG ENG COPORATION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for low-permeability clay with extremely fine particles such as kaolin, the conventional variable head test requires a long test time, and the visual head difference is prone to errors, the range of the head difference is small, and the temperature change is not considered. Working conditions match

Method used

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  • Rapid penetration test device for low permeability media
  • Rapid penetration test device for low permeability media

Examples

Experimental program
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Effect test

Embodiment Construction

[0018] Such as figure 1 As shown, this embodiment is a rapid permeation test device suitable for low-permeability media, including a water supply device, an osmometer, a suction filter bottle 16, an electronic balance 18, and a negative pressure device 19 (a digitally controlled vacuum pump).

[0019] Such as figure 2 As shown, the permeameter in this example has a base 3 , a cylindrical side wall 8 and a pressure-bearing upper cover 11 . The base 3 is shaped on a circular groove matching the size of the cylindrical side wall 8. The cylindrical side wall 8 is placed vertically, and the lower end of the cylindrical side wall is placed in the circular groove on the base 3. An O-shaped water stop ring 5 is arranged between the lower end surface of the cylindrical side wall 8 . A pressure-bearing upper cover 11 is provided above the cylindrical side wall 8, and the pressure-bearing upper cover can be used to close the upper end port of the cylindrical side wall 8. Pressing dev...

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Abstract

The invention relates to a rapid penetration testing device for low-penetrability media, and aims to provide a rapid penetration testing device for the low-penetrability media, wherein the rapid penetration testing device is simple in structure and rapid and accurate in measurement. The rapid penetration testing device is characterized by comprising a water supply device, a penetration instrument, a suction flask, an electronic scale and a negative-pressure device. The rapid penetration testing device is applicable to the field of soil engineering testing technique and environmental judgment, and particularly applicable to measurement of penetration coefficients of low-penetrability media.

Description

technical field [0001] The invention relates to a rapid penetration test device suitable for low-permeability media. It is suitable for the field of geotechnical test technology and environmental assessment, especially for the measurement of permeability coefficient of low permeability medium. Background technique [0002] The permeability coefficient is an important index to measure the permeability of soil and judge the speed of soil consolidation, and it is also one of the important physical properties of soil. Soil seepage stability is a common concern in soil mechanics and engineering geology, and it is also the focus of attention in strengthening soft soil foundations with vacuum preloading. According to the test principle, there are two main types of low permeability test methods: constant head test and variable head test. [0003] The constant water head test is generally applicable to the test of coarse-grained soil, and the variable head test is generally applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 汪明元单治钢狄圣杰
Owner POWERCHINA HUADONG ENG COPORATION LTD
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