A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Development and verification of coupled hydro-mechanical analysis for rainfall-induced shallow landslides
Abstract To improve the performance of rainfall-based shallow landslide warning systems, a coupled hydro-mechanical analysis framework that integrates mechanical slope analysis and hydraulic infiltration is proposed. The limit equilibrium approach for infinite slopes of unsaturated soil is coupled with 1D infiltration analysis to evaluate the transient stability of the soil mass. A hybrid testing process that combines the calculations of stress and hydraulic boundaries near the sliding surface and an element testing system capable of simulating both the stress and hydraulic states on the element boundaries was developed to verify the coupled hydro-mechanical theory. The element-level modeling reveals that the proposed coupled hydro-mechanical analysis is adequate to predict the sliding depth and time of shallow landslides. Furthermore, a time-dependent warning framework based on subsurface moisture content measurements is proposed as an alternative to rainfall-based approaches for early warning of shallow landslides.
Highlights A rigorous, coupled hydro-mechanical approach is proposed for shallow landslides. A 1D infiltration is coupled with an infinite slope theory for unsaturated soil slopes. A hybrid coupled hydro-mechanical testing system was developed. A time-dependent warning framework base on water content variations is proposed.
Development and verification of coupled hydro-mechanical analysis for rainfall-induced shallow landslides
Abstract To improve the performance of rainfall-based shallow landslide warning systems, a coupled hydro-mechanical analysis framework that integrates mechanical slope analysis and hydraulic infiltration is proposed. The limit equilibrium approach for infinite slopes of unsaturated soil is coupled with 1D infiltration analysis to evaluate the transient stability of the soil mass. A hybrid testing process that combines the calculations of stress and hydraulic boundaries near the sliding surface and an element testing system capable of simulating both the stress and hydraulic states on the element boundaries was developed to verify the coupled hydro-mechanical theory. The element-level modeling reveals that the proposed coupled hydro-mechanical analysis is adequate to predict the sliding depth and time of shallow landslides. Furthermore, a time-dependent warning framework based on subsurface moisture content measurements is proposed as an alternative to rainfall-based approaches for early warning of shallow landslides.
Highlights A rigorous, coupled hydro-mechanical approach is proposed for shallow landslides. A 1D infiltration is coupled with an infinite slope theory for unsaturated soil slopes. A hybrid coupled hydro-mechanical testing system was developed. A time-dependent warning framework base on water content variations is proposed.
Development and verification of coupled hydro-mechanical analysis for rainfall-induced shallow landslides
Chang, Wen-Jong (author) / Chou, Shih-Hsun (author) / Huang, Hsin-Po (author) / Chao, Ching-Yu (author)
Engineering Geology ; 293
2021-08-16
Article (Journal)
Electronic Resource
English
Hydro-mechanical Analysis of Rainfall-Induced Landslides
| UB Braunschweig | 2020
Hydro-mechanical analysis of rainfall-induced landslides
| TIBKAT | 2020
Simplified Approach for the Analysis of Rainfall-Induced Shallow Landslides
| British Library Online Contents | 2012