Study of soil expansion characteristics in rainfall-induced red-bed shallow landslides: Microscopic and macroscopic perspectives
Cuiying Zhou, Guangjun Cui, Hao Yin, Lei Yu, Gankai Xu, Zhen Liu, Lihai Zhang
PLoS One | Public Library of Science (PLoS) | Published : 2021
The main cause of rainfall-induced red-bed shallow landslides is the tendency of red-bed weathered soil to expand when it meets water. However, studies on the expansion mechanism of expansive soil have not considered the effects of hydration and particle orientation. In this study, the hydration force of soil was determined according to the electric double-layer theory, the particle direction of soil was determined by analyzing images of soil obtained by scanning electron microscopy, and, finally, a microscopic model of the electrical double layer of red-bed weathered expansive soil was established in which the hydration force and soil-particle orientation were taken into account. The result..View full abstract
Awarded by Ministry of Science and Technology of The people's Republic of China
Awarded by National Natural Science Foundation of China
Awarded by Guangdong Science and Technology Department
This research was funded by Ministry of Science and Technology of The people ' s Republic of China (http://www.most.gov.cn/), grant numbers 2017YFC1501203 and 2017YFC1501201; National Natural Science Foundation of China (http://www.nsfc.gov.cn/), grant numbers 41530638 and 41977230; and Guangdong Science and Technology Department (http://gdstc.gd.gov.cn/), grant numbers 2015B090925016 and 2016B010124007.The authors who received each award is C.Z. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.