A Prediction Method of Saturated/Unsaturated Permeability Coefficient Based on Microscopic Pore Channels

A technology of permeability coefficient and micro-porosity, applied in permeability/surface area analysis, measurement device, suspension and porous material analysis, etc., can solve the problem of slow progress of research work, and achieve the effect of simplifying related calculations
CN107063967BActive Publication Date: 2019-05-03HUBEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUBEI UNIV OF TECH
Publication Date
2019-05-03

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Abstract

The invention relates to a micropore channel-based saturated / unsaturated osmotic coefficient forecasting method, which comprises the following steps: on the basis of a micro-connected channel seepage model and the capillary theory, building a model for forecasting a saturated / unsaturated osmotic coefficient through soil-water characteristic curves; obtaining the soil-water characteristic curve and a saturated osmotic coefficient of soil through a pressure plate apparatus and a varying head test; calculating a comprehensive osmotic ratio constant kc by using the model of the saturated osmotic coefficient; performing n equal division according to the comprehensive osmotic ratio constant kc of a certain type of soil and the actually measured soil-water characteristic curve, and calculating a saturated osmotic coefficient ks and an unsaturated relative osmotic coefficient kr of the type of soil by using the relevant model; multiplying the saturated osmotic coefficient ks and the unsaturated relative osmotic coefficient kr, thus obtaining an unsaturated osmotic coefficient kw. From a microscopic view, the method disclosed by the invention has an important significance for revealing an internal mechanism for controlling the size of an osmotic coefficient of the soil, analyzing seepage of unsaturated soil and researching hydromechanical coupling.
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Description

technical field

[0001] The present invention relates to a method for predicting saturated / unsaturated permeability coefficients based on microscopic pore channels, in particular to a method for predicting permeability coefficients based on microscopic pore channels. Based on the SWCC curve (SWCC), it is an effective calculation method for predicting the saturated or unsaturated permeability coefficient of the soil. Background technique

[0002] Soil-Water Characteristic Curve (SWCC for short) is a curve describing the relationship between suction and water content in unsaturated soil. The soil-water characteristic curve can reflect the size and distribution of pores in the soil. The permeability coefficient, also known as the hydraulic conductivity coefficient, is defined as the unit flow rate passing through the unit hydraulic gradient, and is an important indicator to describe the permeability of the soil. At present, the saturated permeability coefficient is generally pr...

Claims

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