A5033232754- Seismic Waves and Analysis
- Geophysical Methods and Applications
- Seismic Imaging and Inversion Techniques
- Ultrasonics and Acoustic Wave Propagation
TU Bergakademie Freiberg
2021-2024
Abstract The ultrasonic echo technique is broadly applied in non‐destructive testing (NDT) of concrete structures involving tasks such as measuring thickness, determining geometry and locating built‐in elements. To address the challenge enhancing imaging for complex constructions, we adapted a seismic algorithm – reverse time migration (RTM) NDT civil engineering. Unlike traditionally synthetic aperture focusing (SAFT), RTM takes into account full wavefield including primary reflected...
Abstract In the framework of non-destructive-testing advanced seismic imaging techniques have been applied to ultrasonic echo data in order examine integrity an engineered test-barrier designed be used for sealing underground nuclear waste disposal site. Synthetic as well real multi-receiver acquired at test site were processed and imaged using Kirchhoff prestack depth migration reverse time (RTM). general, both methods provide a good image quality demonstrated by various case studies,...
Abstract The ultrasonic echo technique is frequently used in non-destructive testing (NDT) of concrete structures for thickness measurements, geometry determinations as well localization built-in components. To improve imaging complex concrete, we transferred a geophysical technique, the reverse time migration (RTM), to NDT civil engineering. In contrast conventionally synthetic aperture focusing (SAFT) algorithms, RTM wavefield continuation method and uses full wave equation. Thus, can...
imaging results need to be as clear and distinct possible. Ambiguities often arise from artifacts or noise may lead fatal misinterpretation, particularly in the field of nuclear safety. We applied focusing migration methods seismic synthetic real ultrasound data achieved an almost perfect artifact elimination. Our test object is engineered barrier where images deep reflectors are required. The measurement was realized using a tailored ultrasonic system which allows for large source-receiver offsets.
Abstract. Engineering barrier systems are a crucial part of the safe underground disposal radioactive waste, particularly with salt as host rock. Sealing structures made tailored concrete being tested at various sites in Germany. To characterise material properties and potentially also bonding to rock necessary subsurface structures, we apply non-destructive testing, making use advanced geophysical imaging methods. Ultrasonic investigations have been carried out Teutschenthal mine Here, show...