输水隧洞液-气界面DTS监测方法  

Liquid-gas Interface Monitoring Method by DTS in Water Conveyance Tunnel

作　　者：罗焰 任伟 LUO Yan;REN Wei(Safety Management Department,Guangzhou Beijiang Raw Water Supply Co.,LTD.,Guangzhou 510000,China)

机构地区：[1]广州北江原水供应有限公司安全管理部,广州510000

出　　处：《科技和产业》2024年第19期270-277,共8页Science Technology and Industry

摘　　要：输水隧洞的运营状态与其水情息息相关,确定隧洞内液-气界面高度是确保隧洞正常运行的重要前提。基于分布式温度传感(DTS)技术时空连续性、监测便捷性、高空分辨率等特点,提出一种基于DTS技术的输水隧洞液-气界面分布式监测方法及液面高度经验公式,并通过室内模型验证该方法的适用性,分析液面高度、光缆布设角度、加热功率、光缆类型对感测性能的影响。结果表明:DTS液-气界面分布式监测方法配合铜网内加热传感光缆效果最佳,当布设角度为45°、加热时间为2 min,且界面高度处于28 cm及以上时,可以准确反映隧洞内液-气界面高度。The operation state of the water conveyance tunnel is closely related to the water condition,so determining the height of the liquid-gas interface in the tunnel is an important premise to ensure the normal operation of the tunnel.Based on the characteristics of distributed temperature sensing(DTS)technology,such as time-space continuity,monitoring convenience and high altitude resolution,a distributed monitoring method of liquid-gas interface and an empirical formula of liquid level height based on DTS technology were proposed,and the applicability of the method was verified by indoor models.The effects of liquid level height,optical cable laying Angle,heating power and optical cable type on sensing performance are analyzed.The results show that the DTS distributed monitoring method has the best effect when combined with the heating sensor cable in the copper network.When the laying Angle is 45°,the heating time is 2 minutes,and the interface height is 28 cm or above,the liquid gas interface height in the tunnel can be accurately reflected.

关 键 词：输水隧洞 分布式温度传感(DTS) 液-气界面 温度 分布式监测 

分 类 号：TU473[建筑科学—结构工程]