超高水压电力越江盾构隧道结构监测 Structure Monitoring for Electric Power Cross-River Shield Tunnel with Super High Water Pressure

针对特高压GIL综合管廊工程地层分布复杂、外部水压力高、隧道断面尺寸大等特点，提出了一种适用于电力越江盾构隧道的结构健康监测方案及安全评价标准。根据电力越江盾构隧道结构受力的特点，对水土压力、钢筋应力、螺栓轴力、接缝张开量、隧道沉降等进行监测，取钢筋应力、接缝张开和螺栓轴力为安全分级控制值，制定了4级评价标准。 Considering the complex stratum, high water pressure and large section in the Sutong GIL power gallery project, a structure health monitoring and safety assessment method is adopted for electric power cross-river shield tunnel. According to the characteristics of the structure mechanical behavior of the electric power cross-river shield tunnel, the earth and water pressure, reinforce-ment stress, bolt axial force, joint splaying amount and tunnel settlement are monitored, the rein-forcement stress, joint splaying amount and bolt axial force are taken as safety classification control values and an evaluation criterion with 4 levels is proposed.