TY - GEN
T1 - Microscopic Analysis of the Influence of Pore Size Distribution on SWCC Using Extended DDA
AU - Guo, Longxiao
AU - Chen, Guangqi
N1 - Publisher Copyright:
© 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85104448547&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85104448547&partnerID=8YFLogxK
U2 - 10.1007/978-981-16-0077-7_28
DO - 10.1007/978-981-16-0077-7_28
M3 - Conference contribution
AN - SCOPUS:85104448547
SN - 9789811600760
T3 - Lecture Notes in Civil Engineering
SP - 305
EP - 313
BT - Advances in Sustainable Construction and Resource Management
A2 - Hazarika, Hemanta
A2 - Madabhushi, Gopal Santana
A2 - Yasuhara, Kazuya
A2 - Bergado, Dennes T.
PB - Springer Science and Business Media Deutschland GmbH
T2 - 1st International Symposium on Construction Resources for Environmentally Sustainable Technologies, CREST 2020
Y2 - 8 March 2021 through 10 March 2021
ER -