日本正在修建一座用混凝土箱形梁为加劲梁的铁路斜拉桥,其特点是用予应力混凝土拉撑以代替露暴的钢索。设计人员采用予应力杆件以减少通过火车时所发生的钢索延伸量。价值3百30万美元的御本河单轨铁路桥正由日本国营铁路建筑公司在日本北部的岩手县施工。这是沿太平洋联接八户及仙台200英里铁 Japan is constructing a railway cable-stayed bridge with concrete box girders as its stiffening girders, which is characterized by tensioned concrete cables instead of exposed cables. Designers use pre-stressed bars to reduce the amount of cable extension that can occur as they pass the train. The $ 3.30 million Mikimoto River Monorail Bridge is being constructed by Japanese state-owned railway construction company Iwate in northern Japan. It is connected to Hachinohe Pacific Rim and 200 miles of Sendai Railway