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Method for clay inter-particle pore equivalent pore size

A particle and pore size technology, applied in the field of geotechnical engineering, can solve problems such as unspecified quantitative methods and limitations

Inactive Publication Date: 2016-04-06
EAST CHINA JIAOTONG UNIVERSITY
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Problems solved by technology

However, most of the existing studies are limited to evaluating the relationship between the pore size, pore size distribution and capillary pressure in unsaturated soil, and have not given a quantitative method for calculating the pore size.

Method used

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  • Method for clay inter-particle pore equivalent pore size
  • Method for clay inter-particle pore equivalent pore size
  • Method for clay inter-particle pore equivalent pore size

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Embodiment Construction

[0057] A method for the equivalent pore size of pores between clay particles, specifically carried out according to the following steps:

[0058] step 1,

[0059] Firstly, clay-containing soil samples were prepared for soil-water characteristic test, and a complete soil-water characteristic curve was obtained by fitting equation (1) through MATLAB, expressed in terms of mass water content. The fitting formula is as follows:

[0060] θ = ( θ s - θ r ) [ 1 1 + a n ( u a - u ...

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Abstract

The invention provides a method for clay inter-particle pore equivalent pore size. The method comprises the steps of fitting to obtain a whole soil-water characteristic curve, selecting data with matric suction being 144000kPa to 0kPa, converting the matric suction into relative humidity (RH), converting mass water content into water-filled pore volume in soil mass per unit mass, calculating a Kelvin radius, then calculating an actual pore radius and the thickness of a water film, then calculating an average pore radius, calculating the equivalent capillary diameter of the soil mass, and finally calculating the maximum height of capillary rise. By taking the whole soil-water characteristic curve as a carrier, on the basis of existing research, through a large quantity of experiments and combining with the theory of statistics, the equivalent method of pore size of soil samples with different clay content is obtained by derivation, and a favorable approach is provided for the calculation of the maximum height of capillary rise.

Description

technical field [0001] The invention belongs to the technical field of practical application of geotechnical engineering, and relates to a method for measuring the equivalent aperture of pores between clay particles. Background technique [0002] Unsaturated soil consists of soil particles, moisture, air and shrink film. The size, shape and distribution of the pores in the soil are important factors in the structural composition of the soil, and play an important role in the overall engineering behavior related to the volume of the soil. Measuring or estimating pore physical properties also has a profound impact on predicting soil strength, compressibility, and permeability. The magnitude of soil suction can represent the compactness of soil particles, water content and the curvature of shrinkage film in unsaturated soil. Therefore, there have been many studies on the use of soil-water characteristic curves to estimate pore size distribution. However, most of the existing ...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 耿大新李宇晗王迎迎石钰锋
Owner EAST CHINA JIAOTONG UNIVERSITY
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