金民特大桥下穿沪昆高铁施工方案

Construction Scheme of Jinmin Bridge through Shanghai-Kunming High-speed Railway

金民特大桥位于贵州省凯里环城高速公路北段九寨互通主线上,左幅30跨,右幅1号桥4跨,2号桥11跨。凯里环城高速公路北段主线金民特大桥下穿沪昆高铁施工,其施工主要内容包括:桩基、桥墩、U型桥台、装配式T梁架设等工作。重点是该路段工程施工,如果施工措施不当,会对沪昆高铁造成破坏。对做好沪昆高铁防护措施及制定正确的金民特大桥施工方案进行了详细探讨,力求采用最优施工方案。

Jinmin Bridge is located on the main line of Jiuzhai Interchange at the north section of Kaili Ring City Expressway in Guizhou Province,with 30 spans on the left,4 spans on the right and 11 spans on the second.Construction of Jinmin Bridge through Shanghai-Kunming High-speed Railway under the main line of the north section of Kaili Ring City Expressway includes pile foundation,pier,U-abutment,erection of assembled T-beam.Improper construction measures will damage the Shanghai-Kunming High-speed Railway.This paper makes a detailed discussion on the protective measures for Shanghai-Kunming High-speed Railway and formulates the correct construction scheme for Jinmin Bridge in order to adopt the optimum construction scheme.