Abstract: Large Dam Safety Supervision Center of State Electricity Regulatory Commission Optical fiber distributed strain sensing (OFDSS) based on BOTDA/R is a supplementary method to traditional sensors. This new monitoring technique provides a comprehensive and efficient approach for structure health checkup and projects operation state evaluation, which helps diagnose the location and degree of defects timely and then warn before disaster. OFDSS has been used successfully in some large infrastructures and is very promising for hydraulic structure monitoring such as diversion tunnel, surge chamber, spiral case, dam body, etc.

摘要： BOTDA/R分布式光纤监测技术弥补了传统仪器在布点上的不足，真正实现了从预判风险位置到实际发现危险的突破，有助于全面、有效地对工程运行安全状态进行评估，及时诊断损伤的位置和程度，在事故发生前进行预警。目前该技术已应用于一些大型基础设施的监测中，借鉴其成功经验，可在引水隧洞、调压井、蜗壳结构、坝体等水工结构中得到推广应用。