Tunnels & Underground Engineering
Metro Excavation, Tunnel Monitoring & Pile Foundations
UW-FBG distributed strain and temperature sensing deployed in deep excavations and underground structures — enabling real-time monitoring of diaphragm walls, tunnel linings, and smart pile foundations.
Featured Project
Real-world deployment showcasing UW-FBG sensing in metro deep excavation.
Shanghai Metro Line 18 — Deep Excavation Fiber Optic Monitoring
Distributed strain and temperature sensing cables symmetrically installed inside the diaphragm wall of Changjiang South Road Station deep excavation. Enables real-time online monitoring of deep horizontal displacement and internal force distribution during metro construction. The system utilizes UW-FBG arrays with 0.5m spatial resolution, providing comprehensive structural health data throughout the excavation process.
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Fujian Wanhua Chemical — Pile Static Load Testing with UW-FBG Distributed Strain Monitoring
UW-FBG distributed strain sensing cables installed inside the reinforcement cage of two large-diameter bored piles (1,200 mm × 77 m, C40 concrete). Continuous pile-shaft strain data acquired during vertical and horizontal static load tests enabled full-depth internal-force interpretation — axial force distribution, side-friction mobilization, pile-end resistance contribution, and bending-moment concentration zones.
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