首页|Effects of the Rainfall-Triggered Lisse Effect on the Stability of Loess Slopes

Effects of the Rainfall-Triggered Lisse Effect on the Stability of Loess Slopes

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This paper coupled a water-air two-phase hydrodynamic(WATPH)model with the Iver-son's method to analyze the influence of the Lisse effect on the fast groundwater pressure(Pw)response and the slope stability.Furthermore,the sensitivities of the driving force and loess soil parameters were investigated.Results showed that the WATPH model simulated the height and rise of the depth to the water table reasonably well.The depth to water table before rainfall(H0)had a significant impact on the Lissc effect and the slope stability.When the He was less than approximately 1 m,the rainfall trig-gered a significant Lisse effect and decreased the slope factor of safety(Fs).When the rainfall intensity(Ri)was higher than the saturated hydraulic conductivity(Ks),the Lisse effect and the Fs slightly changed with the increase of the Ri,and the slope tended to be unstable with continuous rainfall.With increasing Ks,the Lisse effect noticeably increased,and the minimum Fs quickly decreases.The analysis of the normalized sensitivity coefficient revealed that H0 had a dramatic impact on the Lisse effect and loess slope stability.The different Ri and Ks values had prominent influences on the Lisse effect and slight impacts on F.

Lisse effectlandslidessafety factorrainfall

Zhizhou Yang、Donghui Cheng、Jun Xia

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School of Water and Environment,Chang'an University,Xi'an 710054,China

Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education,Chang'an University,Xi'an 710054,China

Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of the Ministry of Water Resources,Chang'an University,Xi'an 710054,China

Key Laboratory of Water Cycle & Related Land Surface Processes,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China

State Key Laboratory of Water Resources & Hydropower Engineering Sciences,Wuhan University,Wuhan 430000,China

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National Natural science Foundation of ChinaNatural Science Basic Research Plan in Shaanxi Province of ChinaNatural Science Basic Research Plan in Shaanxi Province of ChinaFundamental Research Funds for the Central Universities,CHD

419722482019JM-1462024JC-YBQN-0274300102293103

2024

10.1007/s12583-021-1536-6

地球科学学刊(英文版)
中国地质大学

地球科学学刊(英文版)

CSTPCD
影响因子：0.724
ISSN：1674-487X
年,卷(期)：2024.35(4)
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