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Method for determining dispersion coefficient by combining batch test and soil column test

A technology of dispersion coefficient and soil column, which is applied in the field of combining intermittent test and soil column test to determine the dispersion coefficient, can solve problems such as large differences and different adsorption parameters, and achieve reasonable results, accurate reference basis, and convenient and effective migration and diffusion. Effect

Inactive Publication Date: 2017-07-07
中国人民解放军沈阳军区司令部工程科研设计所
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Problems solved by technology

However, studies have shown that even when using the same test material, the adsorption parameters obtained by batch tests and soil column tests are not the same, and the difference is very large

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  • Method for determining dispersion coefficient by combining batch test and soil column test

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Embodiment Construction

[0027] A method for determining the dispersion coefficient by combining batch test and soil column test, comprising the following steps:

[0028] Step 1, selecting soil material and measuring its geotechnical properties;

[0029] Step 2, configure the solution and prepare the soil sample;

[0030] Step 3, using batch test to determine the adsorption parameters under the condition of critical soil particle concentration;

[0031] Step 4, using the soil column test to determine the concentration distribution of pollutants;

[0032] In step five, the diffusion coefficient is obtained through software inversion.

[0033] The geotechnical parameters selected in the step 1 include particle gradation curve, permeability coefficient, liquid limit, plastic limit, maximum dry density, optimal water content, porosity and specific gravity; select representative heavy metal pollutants as test objects .

[0034] The configuration solution in the step 2 is to prepare a certain concentrat...

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Abstract

The invention belongs to the technical field of environmental geotechnical engineering, and concretely relates to a method for determining a dispersion coefficient by combining a batch test and a soil column test. The method comprises the following steps: a step 1, a soil material is selected, and geotechnical characteristics of the soil material are determined; a step 2, a solution is prepared, and a soil sample is prepared; a step 3, the batch test is used for determining an adsorption parameter in a critical soil particle concentration condition; a step 4, concentration distribution of pollutants is determined by using a soil column test; a step 5, the dispersion coefficient is obtained by inversion with software. The method for determining the dispersion coefficient in landfill liner by using combination of the batch test and the soil column test can be used for conveniently and effectively predicting relocation diffusion of pollutants in the landfill liner; an adsorption parameter value is determined by the batch test in a critical soil particle concentration condition, the soil column test is combined for determining the dispersion coefficient, the results are reasonable, and the condition approaches to the practical engineering condition; and a reference basis is accurately provided for designing the landfill liner.

Description

technical field [0001] The invention belongs to the technical field of environmental geotechnical engineering, and in particular relates to a method for determining the dispersion coefficient by combining intermittent tests and soil column tests. Background technique [0002] Municipal solid waste is mainly disposed of by landfill. Landfill leachate contains a large amount of heavy metal pollutants and other harmful substances. Reasonable prediction of the migration of pollutants in the landfill lining is of great significance to the design of the landfill lining. In order to predict the migration of pollutants in the lining, parameters such as dispersion coefficient need to be determined. [0003] There are mainly two ways to determine the diffusion coefficient: soil column penetration test and batch test. The batch test is simple and easy to operate and takes less time, so it is more widely used. However, studies have shown that, even with the same test material, the ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00
CPCG01N13/00
Inventor 杨清雷于德浩龙凡杨庆张金利韩天成王康李霞张宣宣刘成玮杨彤王睿徐兴宇齐文勃
Owner 中国人民解放军沈阳军区司令部工程科研设计所
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