Basin Layered Structure and Urban Geological Safety

Peng Jianbing; Wang Feiyong; Xu Jishan

doi:10.3799/dqkx.2025.093

Abstract：With the continuous improvement of urbanization levels in China and the ongoing expansion of urban scales,the construction of major city clusters is becoming more mature.However,the pressure on urban development space and ecological environment is increasingly prominent,posing severe challenges to urban geological safety and the living environment.Therefore,there is an urgent need to conduct systematic research to ensure the quality of life for residents and social stability.This paper applies earth system science thinking and,based on explaining the universality of the layered structure and its feedback interactions,systematically analyzes the intrinsic relationship between the various layered structures of basins and urban geological safety.This includes the basement structural layer,the cover layer structure,the hydrological cycle layer,the underground space layer,and the surface engineering layer.It thoroughly examines the types of urban geological safety risks and their hazards under the dynamic influences of each layer,ultimately revealing the internal link between the interrelationships and feedback mechanisms of basin layers and urban geological safety risks.Specifically:Basement structural zone→Disaster-prone structural environment→Regional instability risk;Cap rock structure zone→Disaster-prone key layer zone→Localized cluster disaster risk;Hydrological cycle zone→Disaster-prone hydrological conditions→Urban ground subsidence risk;Subsurface space zone→Disaster-prone interaction zone →Surrounding rock deformation risk;Ground engineering zone→Disaster-prone clustered space →Shallow surface disaster risks.The interrelation and interaction between the layers,as well as the feedback effects,are crucial for urban geological safety early warning and risk prevention and control.These insights provide new perspectives for urban geological safety risk prevention,supporting the implementation of national strategies such as Safe China and Beautiful China.