Unsaturated garbage soil bidirectional gas permeability coefficient determinator

Abstract

The invention belongs to the technical field of geotechnical engineering, and particularly relates to an unsaturated garbage soil bidirectional gas permeability coefficient determinator which determines gas permeability coefficients of garbage soil in the horizontal direction and the vertical direction by using a normal atmospheric pressure permeability test method. The unsaturated garbage soil bidirectional gas permeability coefficient determinator comprises an instrument base, a pressurizing system, an instrument box, a gas guide system and a measuring system, wherein the instrument base is a bottom supporting system of the whole determinator; the instrument box is used for filling a sample; the pressurizing system is used for compacting the sample in a layered manner; the gas guide system provides stable gas flow with certain gas pressure; the measuring system is used for determining gas pressure and flow, and the gas permeability coefficients of the sample are obtained through the Darcy law. Porous plates in the up-down direction (or the left-right direction) of the instrument box can be sealed as needed, so that the permeability coefficients of the same sample in the horizontal direction (or the vertical direction) are determined, and then the anisotropy coefficients of the permeability coefficients of the sample are obtained. A measured object of the determinator not only can be the garbage soil, but also can be a common soil sample, polluted soil and the like.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to an unsaturated garbage soil bidirectional gas permeability coefficient measuring instrument for measuring the horizontal and vertical gas permeability coefficients of garbage soil through a normal pressure permeability test method. Background technique [0002] With the rapid development of my country's economy in recent years, the total amount of urban domestic waste has grown exponentially. How to deal with waste in a green, environmentally friendly and efficient manner has become a hot topic. The landfill method is adopted by most cities due to its low-cost advantage, but there are some problems to be solved urgently in the landfill: the organic matter content and water content of urban garbage in my country are high, and the landfill leachate drainage volume is The level of leachate in domestic landfills is 5 to 10 times that of developed countries...

AI Technical Summary

Problems solved by technology

Using atmospheric pressure test method to measure the gas permeability coefficient of garbage soil indoors, and study the unsaturated permeability characteristics of garbage soil, and then realize the analysis of landfill leachate and landfill gas migration, as well as the design of collection and control systems, but there is currently a lack of such Indoor measuring instrument for unsaturated permeability coefficient of unsaturated garbage-like soil samples

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