题图这幅照片,是南昆铁路上板其2号大桥的透视图。郁郁葱葱的山谷间,一座挺拔纤细的弯桥腾空而过,多么象深邃的夜空中悬挂的一弯新月,宁静皎洁。 这座设计独特的大桥,位于南昆铁路通过贵州、广西、云南三省交界陡峻的山区。梁身在平面上,顺线路曲线弯曲,是我国第一座铁路预应力混凝土平弯桥。它跨过一个“V”形河谷,雨季仅有地表水,是一座谷架桥。 This picture is a perspective view of the Nankang Railway on the 2nd of its bridge. Between the lush valleys, a tall curved slender curved bridge vacated, just like a crescent hanging in the deep night sky, quiet and bright. This uniquely designed bridge is located on the steep mountainous area at the junction of Nanken Railway and Guizhou, Guangxi and Yunnan provinces. Beam body in the plane, along the curve of the curve, is China’s first railway prestressed concrete curved bridge. It crosses a “V” shaped valley, surface water only during the rainy season, is a valley bridge.