%0 Dataset
%T Crack depth detection data of Xiaowan high concrete dam
%J National Cryosphere Desert Data Center
%I National Cryosphere Desert Data Center(www.ncdc.ac.cn)
%U http://www.ncdc.ac.cn/portal/metadata/290ff477-0af9-4d0e-8e2d-0ab87ad412a0
%W NCDC
%R 10.12072/ncdc.nhri_dam.db6886.2025
%A Jia Yu
%A Wang Yulei
%K Concrete hidden cracks;fluorescence stimulation;detection;positioning
%X The depth of concrete cracks is a key indicator of cracking hazards, and accurately determining it is crucial for preventing cracking accidents. However, due to the unique structure of cracks with a large depth - to - width ratio, there is currently a lack of effective methods for accurately measuring crack depth in engineering. This study proposes a new concept: instead of directly detecting the crack tip morphology, it detects the crack tip indicator. We developed a high - permittivity, highly fluid liquid indicator, and customized an indicator injection device and specific - frequency radar antenna. Through radar - based visualization during injection, this method accurately identifies the crack tip position. Using this self - developed technique, we precisely measured the crack depth in the concrete structure of Xiaowan Dam's internal gallery at the 1150 m elevation, solving the industry - long - standing problem of accurate crack depth measurement in hard - to - reach areas. The data obtained can support the evaluation and prevention of cracking hazards in Xiaowan Dam.