Abstract
Considering the characteristics of complex stratum distribution, high external water pressure, and large tunnel section size of the UHV GIL integrated pipeline gallery project, a structural health monitoring scheme and a safety evaluation standard suitable for electric power river-crossing shield tunnels are proposed. According to the stress characteristics of UHV GIL shield cross-river electric power pipe gallery, water and soil pressure, steel stress, bolt axial force, joint opening and tunnel settlement are monitored. Four grade evaluation standards are proposed, which take reinforcement stress, joint opening and bolt axial force as the control values of safety classification.
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