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

Effective soil pore diameter and distribution parameter testing method

A technology of effective pore size and distribution parameters, which is applied in the field of quantifying soil pores and their distribution, and can solve problems such as difficulty in grasping soil mesopore structure.

Active Publication Date: 2015-12-09
JIANGXI UNIV OF SCI & TECH
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The drying method has the advantages of simple operation and low test cost, but it is difficult to grasp the mesoscopic pore structure inside the soil. For this reason, researchers proposed mercury injection method, semi-permeable partition method, centrifuge method, dynamic displacement method, gas adsorption method, etc. method, suspension filtration method, etc.

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
  • Effective soil pore diameter and distribution parameter testing method
  • Effective soil pore diameter and distribution parameter testing method
  • Effective soil pore diameter and distribution parameter testing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The present invention is used to test the effective pore size and distribution parameters of a soil sample of an ionic rare earth mine in Gannan, Jiangxi.

[0047] Step 1: Test the void ratio and permeability coefficient of the soil sample

[0048] In an ion-type rare earth mine in Gannan, Jiangxi, the soil permeability coefficient was tested on-site by the double-ring method to be 1.36×10 -6 m / s, a total of 8 samples were taken on site with a ring knife, and the density and water content of the soil samples were tested. The average density of the soil samples obtained from the test was 1530kg / m 3 And the water content is 15.3%, and the particle density of the soil sample obtained by the test is 2680kg / m 3 , the void ratio of the soil sample was calculated as 0.96 using the relational formula 1.

[0049] Relationship 1

[0050] e = d s ρ w ...

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

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Lengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to an effective soil pore diameter and distribution parameter testing method. The method is applicable to quantifying soil pores and distribution of the soil pores. The method comprises the steps that firstly, the porosity and permeability coefficients of a soil sample are tested; secondly, the pore tortuosity of the soil sample is tested; thirdly, a breakthrough curve of the soil sample is tested; fourthly, the maximum effective radius and the minimum effective radius of the pores of the soil sample are calculated; fifthly, the average effective pore diameter of the soil sample is calculated; sixthly, the pore diameter distribution parameters of the soil sample are calculated. The effective pore diameter and distribution of the soil sample are tested, operation is easy, and the testing cost is low; on the basis of the breakthrough curve of the soil sample on water, the soil pore diameter and distribution are analyzed, and the influence of dead end pores on a testing result can be avoided; compared with a mercury intrusion method, the size of the soil sample is large, and the test result can effectively reflect macro parameters of soil.

Description

technical field [0001] The invention relates to a method for testing soil effective pore size and its distribution parameters, which is suitable for quantifying soil pores and its distribution. Background technique [0002] The soil pore structure has a crucial influence on the seepage process, deformation and failure behavior of the soil, and is often used to explore the mechanical mechanism of the soil, and to explain and predict the macroscopic behavior of the soil, such as soil macropores It is a key factor that causes preferential flow, solute migration, groundwater pollution, nutrient loss and irrigation water waste. Existing research results show that: the existence of large pores increases the saturated hydraulic conductivity of soil several times, and contributes to the total infiltration The ratio can reach 85%, especially the pores with a diameter greater than 1.0mm are important factors affecting the conduction of water flow. [0003] The hydrodynamic properties...

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
IPC IPC(8): G01N15/08
Inventor 王观石胡世丽洪本根罗嗣海
Owner JIANGXI UNIV OF SCI & TECH
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