Back Analysis of a Slope Failure in Permafrost in the Mackenzie Valley, Canada

2006 ◽  
Author(s):  
X. Su ◽  
B. Wang ◽  
S. Nichol
Keyword(s):  
Slope Failure ◽  
Back Analysis

scholarly journals Investigations of a Weathered and Closely Jointed Rock Slope Failure Using Back Analyses

2021 ◽  
Vol 13 (23) ◽  
pp. 13452
Author(s):  
Kuo-Shih Shao ◽  
An-Jui Li ◽  
Chee-Nan Chen ◽  
Chen-Hsien Chung ◽  
Ching-Fang Lee ◽  
...  
Keyword(s):  
Failure Criterion ◽  
Slope Failure ◽  
Back Analysis ◽  
Jointed Rock ◽  
Geological Strength Index ◽  
Northeastern Region ◽  
In Situ Investigation ◽  
Disturbance Factor ◽  
Value Range ◽  
Jointed Rock Slope

This study presents the case of a landslide triggered by a high groundwater level caused by several days of continuous rainfall in the northeastern region of Taiwan. The slope where this landslide occurred consists of closely jointed and weathered bedrock. By means of finite element limit analysis and the Hoek–Brown failure criterion, this study performed a slope failure simulation similar to the actual landslide and deduced the reasonable value range for the combination of key Hoek–Brown failure criterion parameters through back analyses. The results indicate that the key parameters affecting the bedrock’s slope stability were the geological strength index (GSI) and the disturbance factor (D), whereas the effects of the unconfined compressive strength (σci) were less significant. The results of the back analysis reveal that the suitable D-value range and GSI of closely jointed and weathered sandstone in the northeastern region of Taiwan are 0.8 to 0.9 and 20 to 30, respectively. These back-analyzed value ranges can serve as a reference for broader applications in the preliminary stability analysis of similar rock slopes where it is difficult to perform in situ investigation.

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