上海海塘安全隐患地球物理快速探测与识别

Rapid geophysical detection and identification of Shanghai seawall safety hidden dangers

结合海塘隐患探测工作的特点,介绍了两种相对快速的地球物理方法,在大量实际工作的基础上总结了相应方法的探测效果和可识别的隐患类型,分析了各隐患的地球物理特征及隐患解释方法,并列举了典型验证案例。结果显示:地质雷达法能够精细刻画海塘堤顶路面的路基结构,并能有效识别路基结构扰动情况;浅层地震法能够有效反映海塘堤顶至坝体底部基础范围内的海塘内部情况,其中地震映像方法能够快速识别坝体内部的疏松、脱空、扰动等各隐患类型,并能有效解释隐患的位置和深度,瞬态面波法能够反映主要的内部结构分层,并适合进一步的精细化分析。

According to the characteristics of seawall hidden danger detection,two fast and effective geophysical methods are introduced.On the basis of a large number of exploration work,the corresponding detection results and the types of potential hazards that can be identified are summarized,and the geophysical characteristics of each potential hazard and the interpretation and identification methods of potential hazards are analyzed and discussed.The results show that the ground penetrating radar(GPR)method can accurately depict the subgrade structure of the seawall crest pavement,and can effectively identify the abnormal disturbance in the stratum;the shallow seismic method can effectively reflect the internal structure of the seawall from the seawall crest to the bottom of the dam,in which the seismic surface wave method can reflect the main internal structure stratification,and the seismic imaging method can quickly identify It can effectively explain the location and depth of the hidden danger.