Important factor of underground structures utilizing precast and rigid wall is joints and connections of wall-to-wall and wall-to-slab for safety performance and durability of underground constructions. In this study, conducting research on the structural safety of the connection as a future laboratory experiments and connection method for the verification of the details of the construction method is expected to proceed research.

Wireless monitoring system was established to measure PPWS(Prefabricated Parallel Wire Strand) temperature under PPWS erection in Ulsan Grand bridge. The applicability of it to bridge construction site was being evaluated. Wireless function was worked very well within 2km long distance. Transferred data was being analyzed.