DOI: 10.1007/s11069-020-04139-w
论文题名: Risk chart for identification of potential landslide due to the presence of residual soil
作者: Ray A. ; Chaitanya Kumar R.E.S. ; Rai R. ; Gupta S.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2020
卷: 103, 期: 3 起始页码: 3479
结束页码: 3498
语种: 英语
中文关键词: Factor of safety
; Himalayan region
; Numerical simulation
; Residual soil
; Risk chart
英文关键词: finite element method
; landslide
; residual soil
; risk assessment
; slope failure
; slope stability
; stability analysis
; subtropical region
; Himalayas
英文摘要: The incidence of slope failure involving residual soils in the Himalayan Region has increased in recent times. The prevalence of subtropical climatic zone has led to rampant weathering of varying degrees, resulting in the occurrence of residual soil over the bedrock. The study aims to give an overview of residual soil and its effect on the overall stability of the slope. Finite element-based numerical simulations have been performed utilising the results form field visits, laboratory experiments and detailed literature survey, and a landslide risk chart has been proposed. The results indicate the significance of considering the residual soil layer while performing stability analysis. A substantial decline in the factor of safety (FOS) was observed with an increase in the depth of soil layer up to 4 m, and a further reduction in FOS is not observed beyond this depth. Simulation results also indicate limited possibilities of the presence of a thick layer of residual soil on slopes greater than 45°, which is also established through field study. The overall stability of a slope depends on the critical combination of slope inclination, slope height and depth of residual soil layer. The proposed risk chart can be utilised for quick identification of vulnerable slope profiles, thereby indicating priorities for landslide risk management. © 2020, Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168693
Appears in Collections: 气候变化与战略
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作者单位: Department of Mining Engineering, IIT (BHU), Varanasi, Uttar Pradesh 221005, India
Recommended Citation:
Ray A.,Chaitanya Kumar R.E.S.,Rai R.,et al. Risk chart for identification of potential landslide due to the presence of residual soil[J]. Natural Hazards,2020-01-01,103(3)