Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Stability Assessment of Slopes under Normal Weather and Heavy Rainfall Conditions in the Himalayan Region
https://orcid.org/http://orcid.org/0000-0002-2566-7771
Landslides along the motorways in the Himalayan region cause huge damage to life and the economy. Such events are frequent and render the landlocked regions disconnected from the rest of the world for days together. Identifying the hotspot locations for landslide occurrences becomes crucial to reduce the damage caused by landslides. The present study was carried out to analyse five finite slopes under normal or no rainfall and high-intensity rainfall conditions to understand the impact of rainfall on the stability of slopes along National Highway-44 in the Kashmir Himalayas. Geotechnical characterization of the soil samples, both disturbed representative and undisturbed, collected from the selected locations was performed. Rainfall data for the past 10 years was analysed and used for numerical analysis of excess water pore pressure generation and slope stability. The initial condition of excess pore water pressure within the slopes was developed using annual average rainfall, whereas for transient seepage analysis, maximum daily rainfall for 1 day was used. Limit equilibrium-based Morgenstern and Price method used for the determination of factor of safety of slopes. The results showed that all the slopes are stable under normal conditions except the Ramsoo slope. However, under the transient conditions with a maximum daily rainfall scenario, the stability of the slopes is reduced. A significant decrease of 36% in factor of safety (FOS) was observed due to the reduction of matric suction within the slopes. The rate of reduction in FOS was controlled by slope geometry (steepness) and slope material (clay fraction). The results reveal a strong need for detailed investigation, interventions, and landslide mitigation measures for the studied stretch of the all-important NH-44 in the Kashmir Himalayas.
Stability Assessment of Slopes under Normal Weather and Heavy Rainfall Conditions in the Himalayan Region
https://orcid.org/http://orcid.org/0000-0002-2566-7771
Landslides along the motorways in the Himalayan region cause huge damage to life and the economy. Such events are frequent and render the landlocked regions disconnected from the rest of the world for days together. Identifying the hotspot locations for landslide occurrences becomes crucial to reduce the damage caused by landslides. The present study was carried out to analyse five finite slopes under normal or no rainfall and high-intensity rainfall conditions to understand the impact of rainfall on the stability of slopes along National Highway-44 in the Kashmir Himalayas. Geotechnical characterization of the soil samples, both disturbed representative and undisturbed, collected from the selected locations was performed. Rainfall data for the past 10 years was analysed and used for numerical analysis of excess water pore pressure generation and slope stability. The initial condition of excess pore water pressure within the slopes was developed using annual average rainfall, whereas for transient seepage analysis, maximum daily rainfall for 1 day was used. Limit equilibrium-based Morgenstern and Price method used for the determination of factor of safety of slopes. The results showed that all the slopes are stable under normal conditions except the Ramsoo slope. However, under the transient conditions with a maximum daily rainfall scenario, the stability of the slopes is reduced. A significant decrease of 36% in factor of safety (FOS) was observed due to the reduction of matric suction within the slopes. The rate of reduction in FOS was controlled by slope geometry (steepness) and slope material (clay fraction). The results reveal a strong need for detailed investigation, interventions, and landslide mitigation measures for the studied stretch of the all-important NH-44 in the Kashmir Himalayas.
Stability Assessment of Slopes under Normal Weather and Heavy Rainfall Conditions in the Himalayan Region
https://orcid.org/http://orcid.org/0000-0002-2566-7771
Landslides along the motorways in the Himalayan region cause huge damage to life and the economy. Such events are frequent and render the landlocked regions disconnected from the rest of the world for days together. Identifying the hotspot locations for landslide occurrences becomes crucial to reduce the damage caused by landslides. The present study was carried out to analyse five finite slopes under normal or no rainfall and high-intensity rainfall conditions to understand the impact of rainfall on the stability of slopes along National Highway-44 in the Kashmir Himalayas. Geotechnical characterization of the soil samples, both disturbed representative and undisturbed, collected from the selected locations was performed. Rainfall data for the past 10 years was analysed and used for numerical analysis of excess water pore pressure generation and slope stability. The initial condition of excess pore water pressure within the slopes was developed using annual average rainfall, whereas for transient seepage analysis, maximum daily rainfall for 1 day was used. Limit equilibrium-based Morgenstern and Price method used for the determination of factor of safety of slopes. The results showed that all the slopes are stable under normal conditions except the Ramsoo slope. However, under the transient conditions with a maximum daily rainfall scenario, the stability of the slopes is reduced. A significant decrease of 36% in factor of safety (FOS) was observed due to the reduction of matric suction within the slopes. The rate of reduction in FOS was controlled by slope geometry (steepness) and slope material (clay fraction). The results reveal a strong need for detailed investigation, interventions, and landslide mitigation measures for the studied stretch of the all-important NH-44 in the Kashmir Himalayas.
Stability Assessment of Slopes under Normal Weather and Heavy Rainfall Conditions in the Himalayan Region
Transp. Infrastruct. Geotech.
Gowhar, Sehla (Autor:in) / Hussain, Majid (Autor:in) / Srivastava, Amit (Autor:in)
Transportation Infrastructure Geotechnology ; 11 ; 978-1007
01.06.2024
30 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Assessment of Stability of Slopes and Remedial Measures in Lesser Himalayan Region: An Overview
| Springer Verlag | 2024