In recent years,with the acceleration of urbanization and the increasing density of transportation infrastructure,urban road subsidence and collapse incidents occurre frequent-ly due to various factors such as construction activities,geological environment changes,ag-ing of underground pipelines,and natural disasters.There is an urgent need for a rapid and non-destructive geophysical method to provide a basis for emergency response.This paper proposes the natural source surface wave method,utilizing a linear large-channel array to capture high-frequency signals within the natural source surface waves.Comparative experi-ments are conducted on data acquisition duration and the number of channels used in data processing.Following data processing,shear wave velocity profiles are obtained,swiftly i-dentifying four low-velocity anomaly zones and two high-velocity anomaly zones.Through comprehensive analysis of surface surveys,geological data,and borehole information,the paper infers that the low-velocity anomaly zones(with shear wave velocities ranging from 150 to 250 m/s)represent loose formations caused by water-saturated strata.The two high-velocity anomaly zones(both with shear wave velocities between 450 and 500 m/s)are com-posed of one high-velocity body formed by bridge pile foundations and another formed by post-treatment concrete filling.The results demonstrate the effectiveness of the natural source surface wave method in emergency inspections of urban roads.
维普
万方数据