Stability Analysis of Slope Based on Hierarchical Analysis of Fuzzy Entropy

High slope stability of Double-track Bridge on Minjiang River of Chengdu-Lanzhou Railway was studies from different perspectives based on hierarchical analysis of fuzzy entropy and numerical simulation. Then, a rapid assessment model was put forward to evaluate slope stability for different purposes ranging from regional evaluations to individual studies. The results suggested that slope was determined by hierarchical analysis of fuzzy entropy to be "moderately stable" and tended to be "unstable". Under natural working conditions, safe factor of slopes was 1.318, so the slope wasn't quite stable, which was in line with the results gained from the former method. Under rainy working conditions, slope stability was gradually weakened with the increase in precipitation intensity, rainfall infiltration and load. The safety factor was determined to be 1.001, 0.932 and 0.912 for 25mm/d, 35mm/d and 45mm/day precipitation intensity respectively in rainy days. Slope was unstable under seismic working conditions, under which displacement and acceleration were the highest in upper part of the slope, so it was a landslide-prone area under such conditions. Under coupled rainy and seismic conditions, the slope was extremely unstable in the middle and upper parts. With the increase of precipitation intensity, there presented a significant increase in both sliding displacement and acceleration.