Analysis, Assessment, and Remediation of Highway Rockfall

Abstract

Preventing geological disasters such as highway rock collapses is crucial for ensuring traffic safety and social stability. Traditional research often relies on on-site investigations to identify collapses, which can delay the remediation process. In this study, we focused on a highway rock collapse case in Shuangfeng Town, Longchang City. Using a combination of remote sensing imagery analysis, on-site verification, and surveying, we comprehensively obtained the geological characteristics and surrounding environmental information of the dangerous rock mass. Through detailed analysis of the lithology, structure, weathering degree, and other features of the dangerous rock mass, and considering geological structures, climatic conditions, human activities, and other internal and external factors, we explored the formation mechanism of the rock collapse in depth. Subsequently, we assessed the potential threat level of the dangerous rock mass to provide a scientific basis for the design of the remediation plan. The results indicate that the dangerous rock mass in this area is primarily composed of gray thick-bedded to blocky fine-grained sandstone from the Middle Jurassic Shaximiao Formation, with two sets of steeply dipping "X" joints. Stability analysis reveals that under natural conditions, the dangerous rock mass is relatively stable, but its stability significantly decreases under heavy rainfall conditions, becoming unstable. Based on these findings, we proposed a "manual rock clearance" plan. Testing confirmed that this plan.achieved the intended goals and ensured the safety of the area.