期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2018
卷号：189
期号：2
页码：022049
DOI：10.1088/1755-1315/189/2/022049
语种：English
出版社：IOP Publishing
摘要：The elastic wave CT of massive concrete dam generally utilizes the elastic wave traveling time on each ray in the detected section of the measured structure to invert the distribution of the elastic P-wave velocity on the section. At present, there are mainly two detection methods. The first one is the upstream side (underwater) excitation and the downstream side receiving, and the second type is the downstream side excitation and the upstream side (underwater) reception. The second method that the hammer directly hits concrete to stimulate the elastic wave can be called concrete dam impact-elastic wave CT technology. This paper introduces the on-site inspection of the internal defects of RCC gravity dam using the SPV system of Olson Instruments based on impact elastic wave CT technology. Since the sensor string as an elastic-wave signal receiving sensor can be put directly into the reservoir water on the upstream surface of the dam, the detection speed is faster and the result is more reliable. The system can objectively and accurately reflect the internal mass distribution of massive concrete dams after water storage, which is worthy of promotion.
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