Apparatus for measuring soil permeability coefficient

A soil permeability coefficient and soil technology, which is applied in the field of devices for measuring soil permeability coefficient, and achieves the effects of low cost, high water head height and remarkable technological progress

Inactive Publication Date: 2013-11-27
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, judging from the current soil infiltration meter, there are certain limitations to satisfy the work and research on geotechnical engineering

Method used

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  • Apparatus for measuring soil permeability coefficient
  • Apparatus for measuring soil permeability coefficient
  • Apparatus for measuring soil permeability coefficient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, a device for measuring soil permeability coefficient of the present invention includes a support 1, a first piezometric tube 2, and a second piezometric tube 3 columns, and both the first piezometric tube 2 and the second piezometric tube 3 are plexiglass tubes , wall thickness 1mm, inner diameter 6mm, also includes a hollow column 4, described hollow column 4 is a plexiglass column, wall thickness 1cm, inner diameter 20cm, height 1.7cm, the upper end opening of described hollow column 4, so The hollow column 4 is composed of an upper half and a lower half, and the upper half and the lower half are connected by a flange 7. The wall thickness of the flange is 1 cm, and there are 12 symmetrical The holes are connected with screws, there is a latex pad between the two flanges, the thickness of the pad is 1cm, and the pad also has 12 holes, the spacing between the holes is consistent with PVC, and the upper ...

Embodiment 2

[0030] Utilize the present invention to measure the clay of a construction site in Wujiang City. By crushing the clay and passing through a 16-mesh sieve, 18 liters of mixed soil is prepared, wherein sandy soil accounts for 5%, and the sandy soil and clay are mixed evenly, and the experimental parameters are obtained under the smallest constant water head. as follows:

[0031] Experimental parameters of clay containing 5% sand

[0032]

[0033] From the above test parameters, according to the formula Calculate k=4.8x10 -6 cm / s.

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Abstract

An apparatus for measuring soil permeability coefficient comprises one open tubular column; the open tubular column comprises a top half and a bottom half, which are connected by a flange; the bottom of the open tubular column is provided with be provided with a bedding layer; the upper portion of the bedding layer is provided with a soil filling layer; the top half of the open tubular column is provided with at least one drain pipe; the drain pipe is provided with a valve, and connected with a water tank; the top half of the open tubular column is provided inside with a water inlet pipe connected with the water tank; the water inlet pipe is provided with a diaphragm water pump; the open tubular column sidewall at the terminal of the soil filling layer is provided with a first piezometer tube; the open tubular column sidewall at the top of the soil filling layer is provided with a second piezometer tube; and the open tubular column sidewall of the bedding layer is provided with a water outlet pipe. The apparatus provided by the invention can measure soil permeability coefficient under constant water head difference, or variable water head difference, has advantages of simple structure, convenience for operation, wide scope of usage and good accuracy.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering, in particular to a device for measuring soil permeability coefficient. Background technique [0002] The permeability coefficient is a parameter that reflects the seepage performance of water in the pores of rock and soil, and plays an important role in the research of soil treatment sewage, geotechnical engineering construction, and agricultural soil environment. Therefore, how to measure the soil permeability coefficient correctly, conveniently and accurately is very important in scientific research and work. At present, soil infiltration meters are divided into constant water head and variable water head. The constant water head soil infiltration meter is mainly used to measure sandy soil and non-cohesive soil containing a small amount of gravel. The variable water head is mainly used to measure low permeability coefficient and viscous soil. clay. Regardless of the constant water head...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 王罗春陈飞陈冠翰蒋海涛武文燕崔锦灿
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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