Abstract
Collapse hazards are the main type of geologic hazard along highway transportation routes. To determine the focus and order of prevention and control measures for road-bearing collapse disasters in Henan province, China, based on the results of the existing comprehensive risk survey of natural disasters, the collected data were flexibly utilized, the index system method was adopted, and geographic information system software (ArcGIS) was utilized for risk evaluation based on the intensity and sensitivity indices of road-bearing collapse disasters in the area. Moreover, based on the intensity index and sensitivity index, an evaluation model for the comprehensive risk index of collapse disasters was constructed via the index system method. This model was applied to assess the risk zoning of collapse disasters affecting highway hazard-bearing bodies in the Luoyang area. The rationality and reliability of the evaluation model were verified through typical cases of collapse disasters in Luoyang city. The study results revealed that the comprehensive risk index of road-bearing collapse disasters in this region ranges from 39.66 to 83.20, and the risk zoning results coincide well with the distribution of risk points. The risk of collapse disasters was differentiated through diagrams, and the corresponding risk zones were determined, and this could provide technical guidance for risk management of road-bearing collapse disasters in Henan Province, as well as disaster prevention and mitigation.
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