The reporter learned from the construction side of Sanqing Expressway in Yunnan.，00 on May 11，With a weight of 240 tons、The bridge erecting machine, about 70 meters long, will be the last one.TThe beam landed smoothly on the pier.，Qingshui Interchange of Yunnan Qujing Sanbao-Kunming Qingshui Expressway Successfully Completed the Construction Task of Underpassing Shanghai-Kunming High-speed Railway，The key nodes of the whole line have been opened.。

Qingshui Interchange of Qujing Sanbao-Kunming Qingshui ExpresswayGOverlapping of 85 Yinkun Expressway，Four ramps underpass the Shanghai-Kunming high-speed railway，There are many high-voltage electric towers，Karst is strongly developed in the bridge group site area.，The construction environment is complex，High grade of technical gauge，It is a key and difficult project of the whole line.。A total of 125 iron frame beams were involved.，Relating to a high-speed railway operation linksⅢLevel I construction, 4 places and 8 spans in total，The maximum transverse slope of the main span bridge line under the railway is 6.%、Maximum longitudinal slope 4%，Large span、Small radius、Limited headroom，The technical conditions are extremely complicated.。

In order to ensure the safe and smooth construction of beam erection at night under the Shanghai-Kunming high-speed railway，The project department has drawn up a detailed special construction plan and contingency plan.，Comprehensively strengthen site construction management，The construction of all iron frame beams was completed safely and smoothly.。

Source：CCTV news client（Reporter：Liu Wenjie）