INTRODUCTION TO A NEW SURFACE-WAVE BASED NDT METHOD FOR CRACK DETECTION AND ITS APPLICATION IN LARGE DAM MONITORING
Cracking in the body of a large dam has profound impact on the dam’s safety. Whileinformation of cracking depth is known to be of great importance, existing non-destructive test (NDT)methods such as super-sonic technique are usually ineffective in detection of cracks with large depths. This paper introduces an impact elastic-wave based NDT method suitable for detection of such deepcracks. This method not only analyzes the elastic wave propagation times, but more importantlyexploits the attenuation characteristics of Raleigh wave component. A large number of validatingexperiments and comparison studies have shown that this new method, when combined with a uniqueerror processing technique, significantly improves the detection range and measurement precisionover traditional methods. Finally, this paper presents results obtained in a multi-year field monitoringprogram on several large dams in Japan using this new method.
Cracking Large dam Elastic wave Non-destructive test method
Tomoaki Tsutsumi Jiaye Wu Jiaer Wu Xin Huang Zengwei Wu
Tokyo Electricity Power Company Tsurumi-ku, 230-8510, Yokohama, Japan Hachioji, 192-0063,Tokyo, Japa Central Giken Co., Ltd.Tsurumi-ku, 230-8510, Yokohama, Japan Hachioji, 192-0063,Tokyo, Japan Oakland URS Corporation Tsurumi-ku, 230-8510, Yokohama, Japan Hachioji, 192-0063,Tokyo, Japan Oakland, Calif Beijing University of Aeronautics and Astronautics Department of Civil Engineering, Beijing, 100083, Sichuan Central Inspection Tech.Co.Zigong, Sichuan, 64300, China
国际会议
西安
英文
1-21
2005-11-01（万方平台首次上网日期，不代表论文的发表时间）