Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Derivation Method of Equivalent Pore Size of Pores Between Clay Particles

A technology of pore radius and particle, applied in the field of practical application of geotechnical engineering, can solve the problem of not given quantitative method, limitation and so on

Inactive Publication Date: 2019-04-12
EAST CHINA JIAOTONG UNIVERSITY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Derivation Method of Equivalent Pore Size of Pores Between Clay Particles
  • Derivation Method of Equivalent Pore Size of Pores Between Clay Particles
  • Derivation Method of Equivalent Pore Size of Pores Between Clay Particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] A method for deriving the equivalent pore size of pores between clay particles, specifically according to the following steps:

[0060] step 1,

[0061] Firstly, clay-containing soil samples were prepared for soil-water characteristic test, and a complete soil-water characteristic curve was obtained by fitting the formula (1) through MATLAB, expressed in terms of mass water content. The fitting formula is as follows:

[0062]

[0063] In the formula: θ is mass water content;

[0064] u a -u w is the matrix suction;

[0065] θ r is the residual moisture content;

[0066] θ s is the saturation moisture content;

[0067] a, m and n are fitting parameters. The parameter n is related to the soil pore size distribution, and the parameter m is related to the overall symmetry of the soil-water characteristic curve.

[0068] The pore structure of soil determines the vapor pressure in equilibrium. The Kelvin (Kelvin) formula, on the premise of not violating the orig...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an equivalent method of aperture for hole between clay particles, and provides a complete soil-water characteristic curve by fitting. Data of matrix suction which is between 144000kPa-0kPa are selected, the matrix suction is converted into relative humidity RH, mass water content is converted into volume of water for filling holes in soil per unit mass, Kelvin radius is calculated, real hole radius and thickness of water membrane are calculated, an average hole radius is calculated, and then a equivalent capillary diameter of soil is calculated, and finally a maximum capillary height is calculated The complete soil-water characteristic curve is used as a carrier, based on the prior research and a lot of experiments combined with statistics theory, the equivalent method of aperture of soil sample containing different clay particles, thereby providing a favorable approach for calculating the maximum capillary height.

Description

technical field [0001] The invention belongs to the technical field of practical application of geotechnical engineering, and relates to a method for deriving the equivalent pore diameter 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 exist...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
Inventor 耿大新李宇晗王迎迎石钰锋
Owner EAST CHINA JIAOTONG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com