Soil permeameter

A technology for soil infiltration and soil samples, applied in the field of devices for measuring soil permeability

Inactive Publication Date: 2006-10-04
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned problems existing in the existing soil infiltration meter and provide a kind of soil infiltration meter which can measure both water permeability and gas permeability

Method used

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Examples

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Embodiment Construction

[0016] Such as figure 2 As shown, the soil infiltration meter of the present invention includes a soil sample ring 1, a loading piston 2, a base 3, and a GDS gas (water) pressure controller 5. The loading piston 2 can move up and down in the sample ring 1. In order to ensure a good seal between them, there are two annular grooves on the outer surface of the lower part of the loading piston 2, and an "O"-shaped sealing ring 6 is placed in the groove. Also be provided with " O " shape sealing ring 6 on loading piston and base. There is an appropriate amount of concentric annular grooves on the lower surface of the loading piston 2, and a porous water-permeable stone 7 is also provided below. There is also an appropriate amount of concentric annular grooves at the center of the upper surface of the base, and an "O"-shaped sealing ring 6 is placed on the outside, and porous permeable stones are laid on it to ensure that the air pressure can be evenly applied to the lower surface...

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Abstract

The related permeameter to measure soil permeability comprises: a soil sample ring (1), a loading piston (2) with an exhaust channel in (1) for up-down slide, a base (3) with and air inlet and exhaust channel on two sides. Wherein, both exhaust channels of (2) and (3) connect with self GDS pressure controller (5) through high-pressure plastic pipe (9). This invention can obtain the soil permeability on different void ratio and stress.

Description

technical field [0001] The invention relates to a device for measuring soil permeability in the field of geotechnical engineering test research. Background technique [0002] In geotechnical engineering testing and application, there are many occasions that a test device is needed to measure the permeability of air in soil. For example, in the construction of compressed air caisson and air-balanced shield, it is often necessary to use high-pressure air to maintain a certain air pressure on the excavation surface of the soil to balance the external water and soil pressure, so as to obtain a good excavation construction environment. The gas permeability parameters of the excavated soil are obtained through indoor tests, so as to determine the process parameters for applying and maintaining air pressure during on-site construction. Because the types of soils to be tested are mostly saturated clay or silty clay, and the penetration rate of gas in different soil layers is slow a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/10G01N15/08E02D33/00
Inventor 叶为民陈宝白云王初生朱合华钱丽鑫
Owner TONGJI UNIV
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