Denzai Engineering utilised an Enerpac JS-250 jack-up system for a bridge removal project in Narita City, Chiba, Japan.
The 150-tonne overpass road bridge was removed as part of the preliminary works ahead of a planned runway extension at Narita International Airport. Using the JS-250 towers, mounted on SPMTs, the bridge was removed overnight to minimise traffic disruption on the Higashi-Kanto Expressway.
Lack of space prevented the use of a crane for the bridge removal, which led Denzai to the JS-250 jack-up system. The platform was used to support the 21 m-long and 5 m-wide bridge deck as it was lifted and transported to a rigging location near the expressway.
The extension of Runway B at Narita International Airport requires the creation of a new intersection between the Higashi-Kanto Expressway and the extended section of the runway. Removal of the bridge will allow the Higashi-Kanto Expressway to be temporarily rerouted during the intersection construction.
