A GIS-based Urban Road Collapse Risk Assessment System and Its Case Study in Guangzhou

Road collapse has become one of the frequent geological disasters in large cities. Scientific risk assessment is of great significance for the layout of urban road collapse prevention and control work. The current standards related to road collapse risk assessment can be roughly divided into two categories: industry standard Standard for Comprehensive Detection and Risk Evaluation of Underground Disasters in Urban Area (JGJ/T 437-2018) and regional standards in Beijing City Code for Assessment and Prevention and Cure of Surrounding Soil Disease of Underground Pipeline (DB11/T 1347-2016) and Henan Province Technical Standard for Detection of Underground Disasters on Urban Roads (DBJ41/T 233-2020). For the visual prevention and control of road collapse risk, the risk assessment system based on geographic information system (GIS) has been gradually promoted. Definitely, this paper constructs a GIS-based urban road collapse risk assessment system (RCRAS) based on JGJ/T 437-2018, DB11/T 1347-2016 and DBJ41/T 233-2020. The system has developed functional modules such as ground and underground 2/3-Dimensional visualization, database management and road collapse risk assessment. Subsequently, it was applied to the road collapse risk assessment of Dongfeng Road, Guangzhou, P.R. China, which provides scientific support for the visualization and standardized implementation of urban road collapse risk prevention and control for Guangzhou Transportation Bureau.