南水北调东赵河倒虹吸安全监测

Safety Monitoring of Dongzhao River's Inverted Siphon Project of South-to-North Water Diversion Project

对南水北调中线工程东赵河倒虹吸的进口闸室施工期间的钢筋应力、混凝土应变与温度进行安全监测,首先分析了监测所得的原始数据的误差原因,采用平差、补差和修匀等方法对原始数据进行基本处理以获得更精确的数据;然后对监测数据进行对比分析.结果表明:温度与钢筋应力、混凝土应变之间大致趋势呈现负相关关系,钢筋的最大拉应力与压应力均在钢筋允许承受范围内,满足施工期安全要求.东赵河进口闸室的安全监测不仅保证了工程的安全施工,还可为同类工程的安全监测提供借鉴和参考.

During constructing the lock chamber of Dongzhao River＇s inverted siphon in the middle route of South-to-North Water Diversion Project, its reinforcement stress, concrete strain and temperature monitoring data were analyzed. The reason analysis of initial data errors during safety monitoring has been carried out. Some methods of adjustment, sender and smoothing were used for raw data processing to obtain more accurate data. The results showed that there is a good negative correlation between the temperature and steel bar stress, concrete strain. Moreover, both the maximum tensile stress and compressive stress of steel bar were within its allowed range, and meet the safety requirements during the construction. Therefore, safety monitoring of the lock chamber of Dongzhao River＇ s inverted siphon ensured the safety construction of projects. This can provide a reference for safety monitoring of similar projects.