Article
Computer Science, Interdisciplinary Applications
Lei Zhang, Xin Jiang, Rong Sun, Hanyan Gu, Yongguo Fu, Yanjun Qiu
Summary: This study proposes an analytical framework to assess the stability of unsaturated soil slopes for deep-seated rotational failure and validates its effectiveness through previous literature and finite element analysis. By developing stability charts, the impact of cracks of any depth on the slope can be calculated, and a range of critical crack depth and maximum crack depth is proposed based on the stability charts.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Engineering, Chemical
Zhiliu Wang, Xinming Li, Song Yin, Xidong Du
Summary: In this study, a new mechanical model was developed to consider the degradation of soil strength due to water migration. Through a case study, it was found that the wetting front depth increased with increasing rainfall time and showed different trends in different stages. The improved analytical solution can accurately evaluate the potential sliding surface under rainfall conditions, providing guidance for slope stability evaluation and analysis of dangerous surfaces.
Article
Engineering, Environmental
Yang Li, Kaixi Xue, Yu Zhao, Chaolin Wang, Jing Bi, Tianyuan Wang, Shenfu Wang, Bo Zhang
Summary: This paper investigates the influence of rainstorm conditions on the stability of layered soil slopes through physical model tests and numerical simulation. The results show that the layered structure and inclination affect the rainwater infiltration and stability of the slopes. Different inclinations greatly influence the safety factors, with downdip slopes being more susceptible to landslides. The results provide a theoretical basis for designing a stratified soil slope management plan.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Computer Science, Interdisciplinary Applications
Jingshu Xu, Xu Zhao, Pengfei Li, Mingju Zhang
Summary: This study investigates the impact of rainfall infiltration on slope stability, revealing that the 3D characteristics of a slope and rainfall patterns are crucial factors affecting the slope's factor of safety and failure patterns. Different rainfall infiltration patterns result in diverse variations in factor of safety solutions and critical failure patterns of the slope.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Geological
Josip Peranic, Zeljko Arbanas
Summary: Numerical modeling has been widely used in studying rainfall-induced landslides, but the influence of temporal resolution of rainfall data in the simulations has received little attention. This study investigates the effects of different temporal resolutions of realistic rainfall data on infiltration and slope stability analysis using a 2D numerical model. The results show that using coarse resolution rainfall data can lead to unrealistically high infiltrated volumes and a conservative prediction of slope failure time, suggesting hourly rainfall data as the optimal input for the case study.
Article
Engineering, Geological
Nilo Lemuel J. Dolojan, Shuji Moriguchi, Masakazu Hashimoto, Nguyen Xuan Tinh, Hitoshi Tanaka, Kenjiro Terada
Summary: This study introduces a catchment-scale, multihazard approach to assess landslides and flooding caused by heavy rainfall. By combining hydrological and geotechnical principles, the model successfully simulates the hydrologic and geotechnical response of the catchment, providing a practical framework for a unified early warning system for landslide and flood-prone areas.
ENGINEERING GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Xin Gu, Lin Wang, Qiang Ou, Wengang Zhang
Summary: This study proposes an extreme gradient boosting-based stochastic analysis framework to estimate the rainfall-induced slope failure probability. The spatial variability of soil properties, rainfall intensity, and rainfall pattern were found to have significant effects on the failure probability. The proposed framework can accurately and efficiently compute the failure probability and provide guidance for landslide emergency management departments.
GEOSCIENCE FRONTIERS
(2023)
Article
Geosciences, Multidisciplinary
N. J. Finnegan, J. P. Perkins, A. L. Nereson, A. L. Handwerger
Summary: The research shows how unsaturated groundwater flow processes control the onset of seasonal landslide motion and the nearly instantaneous pressure transmission within the landslide body due to rainfall, providing insights into the dynamics of infiltration into unsaturated ground.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2021)
Article
Engineering, Geological
Josip Peranic, Snjezana Mihalic Arbanas, Zeljko Arbanas
Summary: This study investigates the effects of rainfall on the stability of a flysch slope and the reactivation of landslides. It highlights the crucial role of rainfall duration in landslide reactivation, as well as the significant correlation between antecedent rainfall and time to failure. The study also emphasizes the importance of the unsaturated zone in maintaining slope stability during prolonged rainfall events.
Article
Geosciences, Multidisciplinary
Kai Wang, Shaojie Zhang
Summary: This study proposes a more accurate landslide model that considers soil interaction between adjacent cells, defines slope units, and investigates critical slip surfaces. Applying this model to the Three-Gorges Reservoir Area in China, the results show different effects of antecedent precipitation and rainfall return period on landslide triggering. The study highlights the potential increase in landslides in unexpected areas due to extreme rainfall events induced by climate change.
Article
Engineering, Geological
Nilo Lemuel J. Dolojan, Shuji Moriguchi, Masakazu Hashimoto, Kenjiro Terada
Summary: A method for analyzing shallow slope failures caused by rainfall is developed through the use of the Green-Ampt infiltration equation and the infinite slope stability model. The model is applied and validated with landslides that occurred during Typhoon Hagibis in Japan, showing good agreement with reported failure depths and times. The applicability of the model extends to post-analysis, real-time, or projected assessment of slope stability based on input rainfall data.
Article
Engineering, Geological
Paolo Paronuzzi, Alberto Bolla
Summary: This paper investigates the shallow landslides triggered by rainfall in the alpine environment, particularly focusing on the colluvial soil covering the terraced belts. The study describes the engineering geological characteristics and failure mechanisms of these landslides and presents data on their geomorphological and engineering geological characteristics. The findings show that a critical rainfall intensity of about 40-45 mm/h can cause soil slips in mountain basins with high humidity and fine fraction content.
ENGINEERING GEOLOGY
(2023)
Article
Engineering, Environmental
Gengqian Nian, Zhonghui Chen, Lingfei Zhang, Min Bao, Zihan Zhou
Summary: A numerical method combining the numerical solutions of rainfall infiltration with the upper-bound theorem of the limit analysis kinematic method is proposed to investigate the 3D stability of a slope under variable rainfall conditions. The safety factors and failure patterns of the slope are calculated and compared to verify the reliability of the method. The results show that increasing rainfall has the strongest effect on slope stability, and the 3D stability analysis is more practically important than the 2D plane strain analysis.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Review
Green & Sustainable Science & Technology
Joram Wachira Mburu, An-Jui Li, Horn-Da Lin, Chih-Wei Lu
Summary: In the past 30 years, research on rainfall-induced landslides has made significant progress. The contribution of matric suction and water flow in unsaturated soils has been widely accepted. However, the application of unsaturated soil mechanics in geotechnical engineering practice has been slow due to practical limitations. This paper conducts a parametric study on unsaturated silty slopes and identifies the suitable slope and hydrologic conditions for preliminary stability analysis. The results show that suction plays a significant role in silt/clay slopes with a water table below the mid-height of the slope, while slope height becomes the primary controlling factor for slopes with a height of 20 m or more and a high water table. Two case studies are presented to review the application of geotechnical software in rainfall seepage and stability analyses of unsaturated slopes, which demonstrate notable differences in output results due to different methods and approaches.
Article
Engineering, Environmental
Xin Liu, Yu Wang, Anthony Kwan Leung
Summary: Rainfall plays a crucial role in triggering landslides in many areas. Understanding the relationship between rainfall characteristics and slope stability is essential for mitigating landslide risks. Previous studies have shown that there exists a threshold curve of rainfall intensity and duration for a specific slope, beyond which landslides are expected to occur. This study aims to overcome the limitations and assumptions of previous research and investigate the rainfall intensity-duration control of landslides using real slope case histories and rainfall records. A generalized procedure called the critical rainfall pattern curve (CRPC) is proposed, which provides a simple yet effective tool for slope-specific landslide prediction and risk assessment.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)