Internal defect identification method of earth-rock dam structure based on multi-source geophysical data information interpretation

Aiming at the problems of weak interpretation ability, low precision and low resolution of inversion results of traditional geophysical prospecting methods for hidden safety hazards of earth-rock dams, a method for identifying internal defects of earth-rock dams based on multi-source data information interpretation of geophysical prospecting is proposed. In order to explore the distribution attributes of internal defects in earth-rock dams, the implementation process of internal defect identification of earth-rock dams based on the fusion of ground penetrating radar (GPR) and electrical resistivity tomography (ERT) geophysical information is constructed. Through the preprocessing, spatial registration and information fusion of the original geophysical data from the same source and different sources, and combined with the prior knowledge of the formation medium of the earth-rock dam, the imaging interpretation method of the internal defects of the dam based on different information fusion strategies is established. The method realizes the accurate identification of the full-chain structural defects of the hidden danger detection information of the earth-rock dam from data processing fusion to inversion imaging. Combined with the actual engineering exploration research, it is shown that the proposed fusion theory and method can effectively identify the hidden defects inside the dam. Compared with the traditional single geophysical prospecting method, the inversion results of this method have stronger interpretation ability, which can effectively solve the problems of misidentification and omission of traditional methods, and the degree of identification and visualization are significantly enhanced. It can provide method support for accurate diagnosis of hidden defects in earth-rock dams. In addition, after some improvement and expansion, the method can also be applied to the detection and analysis of hidden dangers in other earth-rock structure buildings.