Microscopic Analysis of the Influence of Pore Size Distribution on SWCC Using Extended DDA

Longxiao Guo, Guangqi Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Soil–water characteristic curve (SWCC) is one of the most important properties of unsaturated soil, and pore size distribution (PSD) curve is commonly used to predict SWCC. In this study, an extended discontinuous deformation analysis (DDA) method is used to reveal the influence of PSD on SWCC from the micromechanism. First, the performance of the extended DDA method is validated by the experimental SWCC. And DDA microsimulation result is in good agreement with the experimental result. Then, the relationship between PSD curve and SWCC is analyzed based on the DDA simulation results. The microsimulation results show that PSD influences SWCC by changing the capillary radius in soil. Air-entry value decreases with the percentage of large pore increase. However, the effect of PSD on SWCC tends to diminish at the residual zone because the micropores do not show much difference between two models. This study extends DDA in unsaturated soil analysis and provides support for PSD-based SWCC prediction from the micromechanism.

Original languageEnglish
Title of host publicationAdvances in Sustainable Construction and Resource Management
EditorsHemanta Hazarika, Gopal Santana Madabhushi, Kazuya Yasuhara, Dennes T. Bergado
PublisherSpringer Science and Business Media Deutschland GmbH
Pages305-313
Number of pages9
ISBN (Print)9789811600760
DOIs
Publication statusPublished - 2021
Event1st International Symposium on Construction Resources for Environmentally Sustainable Technologies, CREST 2020 - Fukuoka, Japan
Duration: Mar 9 2021Mar 11 2021

Publication series

NameLecture Notes in Civil Engineering
Volume144 LNCE
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference1st International Symposium on Construction Resources for Environmentally Sustainable Technologies, CREST 2020
Country/TerritoryJapan
CityFukuoka
Period3/9/213/11/21

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

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