A simplified directly determination of soil-water retention curve variables

Indexed by:期刊论文

Journal:GEOMECHANICS AND ENGINEERING

Volume:23

Issue:5

Page Number:431-439

ISSN No.:2005-307X

Key Words:soil water retention curve; pore size distribution; air-entry value; residual value; soil shrinkage curve

Abstract:Soil-water retention curve (SWRC) contains key information for the application of unsaturated soil mechanics principles to engineering practice. The SWRC variables are commonly used to describe the hydro-mechanics of soils. Generally, these parameters are determined using the graphical method which can be time consuming. The SWRC is highly dependent on the pore size distribution (PSD). Theoretically, the PSD obtained by mercury intrusion porosimetry test can be used to determine some SWRC variables. Moreover, the relationship between SWRC and shrinkage curve has been investigated. A new method to determine total SWRC variables directly without curve-fitting procedure is proposed. Substituting the variables into linear SWRC equations construct SWRC. A good agreement was obtained between predicted and measured SWRCs, indicating the validity of the proposed method for unimodal SWRC.

Date of Publication:2021-02-02