In April 2012, approximately 162 km of the New Tomei Expressway between Tokyo and Nagoya were opened. This expressway is located on the south-eastern coast of Honshu, Japan's main island, and runs parallel to the older Tomei Expressway. The new expressway alleviates traffic congestion on the old Tomei Expressway and improves accessibility of Japan's three major cities.
The overall length of the bridges and viaducts on the New Tomei Expressway is 51.6 km. Construction work was often difficult due to the fact that large rivers, steep hills and mountains had to be crossed. In order to achieve cost-efficiency, environmental sustainability, construction efficiency and low maintenance, a large number of the structures were built as prestressed concrete bridges in accordance with the latest technologies of the Central Nippon Expressway Company. Among other structures, this included precast segmental box girder bridges with strutted wing slabs, prestressed concrete continuous corrugated steel web box girder bridges and prestressed concrete continuous rigid frame composite truss bridges.
Strand post-tensioning systems for 31 bridge structures
Sumitomo supplied DYWIDAG Systems for a total of 31 bridge structures along the New Tomei Expressway. A large part of the strand post-tensioning systems were used as external and internal tendons. In addition to Type 12S 15.2 MA DYWIDAG Strand Tendons with bare strands, Sumitomo also supplied Type 19S 15.2 MC DYWIDAG Strand Tendons with epoxy coated and filled strand as well as Type 19S 15.7 MC DYWIDAG Strand Tendons with epoxy coated and filled high strength strand.
Hamamatsu, Shizuoka, Japan (2011)
Hamamatsu, Shizuoka, Japan (2000)
Shizuoka, Shizuoka, Japan (2009)
Shizuoka, Shizuoka, Japan
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