|
|||||
|
|
The role of uncertainty in bedrock depth and hydraulic properties on the stability of a variably-saturated slope |
|
| Institution: | 1. Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India;2. Department of Civil and Environmental Engineering, Shantou University, China;3. Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong Special Administrative Region |
| Abstract: | We investigate the uncertainty in bedrock depth and soil hydraulic parameters on the stability of a variably-saturated slope in Rio de Janeiro, Brazil. We couple Monte Carlo simulation of a three-dimensional flow model with numerical limit analysis to calculate confidence intervals of the safety factor using a 22-day rainfall record. We evaluate the marginal and joint impact of bedrock depth and soil hydraulic uncertainty. The mean safety factor and its 95% confidence interval evolve rapidly in response to the storm events. Explicit recognition of uncertainty in the hydraulic properties and depth to bedrock increases significantly the probability of failure. |
| Keywords: | Bedrock depth Hydraulic parameters Slope stability Unsaturated flow Limit analysis Safety factor |
| 本文献已被 ScienceDirect 等数据库收录！ | |