Speaker
Description
Large concrete dams require non-invasive methods capable of probing internal density structures over metre-to-decametre scales, especially when detailed geometric priors or internal drawings are incomplete. Here we report a field-deployable plastic-scintillator muon transmission imaging framework for quantitative structural imaging of the reservoir dam in Yichang, Hubei, China. The framework combines detector-response modelling, Geant4-based dam-scale simulation, scattering-migration analysis, low-count transmission reconstruction and limited-prior three-dimensional localization. Applying the calibrated reconstruction pipeline to field data, we resolve and localize gallery-like internal low-density structures in the dam and estimate their spatial extent under limited geometric priors. We further assess the potential of the same framework for suspicious defect-candidate localization using controlled simulations. Our results demonstrate that muon transmission imaging can provide a cautious and quantitatively interpretable probe of internal structures in large concrete infrastructure.
