 DYWIDAG Strand Tendons Stabilize Shishihara Viaduct No. 2The Shishihara Viaduct No. 2 in Japan crosses motorway 52, which links the prefectures of Shizuoka and Yamanashi on Japan’s main island of Honshu. The viaduct is an 8-span continuous box girder bridge with strutted wing slabs. The bridge is 579m long, with a maximum span length of 79m. The bridge was constructed using the cantilever method. As the bridge spans a deep gorge, it had to be erected with the help of 200t crawler cranes. Up to six form travelers were necessary for construction work: two large form travelers for the wider segments and four mid-size form travelers for the standard segments. The 12S15.2 MA DYWIDAG Strand System was used for the longitudinal post-tensioning of the bridge deck. Pre-grouted 1S28.6 Prestressing Strands were used for edge beam reinforcing and for the strut anchors. Sumitomo also supplied pre-grouted 1S21.8 Prestressing Strand for the transverse post-tensioning of the deck slabs and the longitudinal tensioning of the cantilever deck slabs. In order to increase durability, minimize work related to grouting and make future maintenance work easier, the post-tensioning system that was used was the 19S15.2 MC DYWIDAG Strand System with epoxy coated and filled strands. Since the opening of the new section, travelers have been rewarded with an exceptional view of famous Mount Fuji and the region’s tea plantations and tangerine orchards. |