Dynamic Assessment of Geological Hazard Risk of Double-Track High-Risk Slope of Chongqing-Hunan Expressway

Abstract

This study focuses on the dynamic assessment of geological hazard risk of the Hetaoping landslide on the left side of Beacon K51+960--K52+060 of Bapeng Road 3 in the Banan-Pengshui section. Through a variety of means such as Utilizing various methods, including field geological mapping, in-situ testing, and indoor geotechnical tests, we conducted a comprehensive investigation of the slope’s topography, stratum lithology, geological structure, and hydrogeological conditions. Based on the monitoring data, we dynamically analyzed the slope’s stability under different working conditions using both the limit equilibrium method and numerical simulation techniques. We evaluated the likelihood and impact range of geological disasters, such as landslides and collapses. The results indicate that the slope is generally stable under natural conditions; however, under extreme circumstances, such as heavy rainfall and earthquakes, the local stability coefficient of the slope decreases, posing a risk of instability that could lead to small-scale landslides and collapses. This dynamic assessment provides a crucial foundation for the scientific prevention and engineering decision-making regarding the slope, aiding in the reduction of geological disaster risks and ensuring the safety of surrounding residents and the smooth progression of construction projects.