ABSTRACT
The authors developed two remote monitoring systems and applied them to a mountain tunnel construction site: “T-iMonitor Tunnel” for excavation and “T-iMonitor Tunnel Concrete” for lining works. The former can monitor and record remotely the operational status of heavy machinery and temporarily installed facilities together with working environments. All the data are transmitted to a cloud server via internet connection, with which a developed Web application visualizes them on smart devices. Combining operating facilities and machinery hours, the system can automatically analyze the cycle-time for a round of excavation. The latter uses proximity, temperature and pressure sensors equipped on a traveling steel formwork for the secondary lining, and visualizes the occupancy and condition of fresh concrete cast in the formwork. The system could eliminate cumbersome works on sites such as checking the concrete casting process from narrow windows and documentation.
