摘要
为了实时监测预应力钢筒混凝土管(PCCP)管道预应力钢丝的状态,防止断裂的预应力钢丝给管道的运行埋下巨大的安全隐患,采用基于相位敏感光时域反射仪和马赫-曾德干涉仪的两种分布式光纤传感技术互补的模式,对PCCP的断丝事件实施了精准定位和声音还原,实现在役的PCCP管道预应力钢丝断裂事件的实时监测和定位,对于预防PCCP工程系统发生灾难性事故、避免造成重大经济损失和恶劣社会影响具有关键作用,对基于分布式光纤传感的PCCP断丝监测技术的进步和在长距离供水工程中的应用具有重要意义。
In order to monitor the state of prestressed steel wire in prestressed concrete cylinder pipe(PCCP)pipeline in real time,and to prevent great hidden danger to the operation of pipeline caused by the broken prestressed steel wire,the complementary mode of two distributed optical fiber sensing technologies,namely,phase-sensitive optical time-domain reflectometer and Mach-Zehnder interferometer,is adopted to implement accurate positioning and sound reduction of PCCP broken wire event,and realize real-time monitoring and positioning of broken prestressed wire event of PCCP pipeline in service. It plays a key role in preventing catastrophic accidents in PCCP project system and avoiding significant economic losses and adverse social impacts,and is of great significance for the progress of PCCP broke wire monitoring technology based on distributed optical fiber sensing and its application in long-distance water supply projects.
作者
孙钰
封皓
沙洲
SUN Yu;FENG Hao;SHA Zhou(Liaoning Northwest Water Supply Co.,Ltd.,Shenyang 110003,China)
出处
《水利建设与管理》
2022年第10期75-79,共5页
Water Conservancy Construction and Management
关键词
预应力钢筒混凝土管
马赫-曾德干涉仪
相位敏感光时域反射仪
分布式光纤传感
断丝监测
prestressed concrete cylinder pipe
Mach-Zehnder interferometer
phase-sensitive optical time-domain reflectometer
distributed optical fiber sensing
broken wire monitoring
