Application of Linear Table Array Micromotion Detection Method in the Survey of Abandoned Air Defense Shelters

Summary The existence of underground air defense holes brings great threat to the safety of life and property, therefore, it is of great significance to investigate the air defense holes. In recent years, micromotion technology has been widely used in underground space investigation due to its advantages of strong spatial adaptability, fast and safe construction and certain anti-interference ability. In this paper, a district in Zhangjiakou is taken as an example, and the linear table array micromotion method is adopted to investigate the underground air defense hole. The anomalous low velocity zone obtained by dispersion curve extraction and transverse wave velocity inversion is highly consistent with the known air-raid shelter. The test results show that the linear table array micromotion detection method has good application effect for underground air defense hole investigation under complex environment, and can provide reference for similar underground space investigation engineering problems.