Types and countermeasures of urban pavement collapse

In recent years, with the development of urban construction, the collapse of urban pavement has become one of the main types of urban geological disasters, which attracts people's attention increasingly.Urban pavement collapse is generally small in scale and mostly single point collapse, but once it occurs, it will become an emergency affecting urban life.This paper summarizes and analyzes the collapse cases publicly reported throughout the country, and the results show that urban pavement collapse can be generally divided into four types:karst type, pipeline type, construction quality type and air-raid shelter type.The subsidence of urban pavement is closely related to the degree of urban development, but the correlation with the degree of karst development is not obvious.Rainstorm is one of the main inducing factors of pavement collapse.Pavement collapse is mainly single point collapse with different scales.Further, from the perspective of early collapse hidden danger identification, mid-term emergency plan and late project treatment, the corresponding disposal schemes for the four types of urban pavement collapse are respectively proposed, providing reference for future urban pavement collapse related research and collapse prevention, emergency and disposal schemes.