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随着线路运营速度的提高以及高速铁路的快速发展,对铁路线路的几何尺寸要求越来越高,尤其在岔群区,对线路的沉降控制要求更高。因此岔群区域施工进行桥涵顶进施工时,如何控制路基的沉降、确保线路运营安全是施工中难点。文章以成都北新大道高架桥底层道路工程排水干管穿越成渝线K1+430铁路加固工程施工为例总结于此。
With the increase of line operation speed and the rapid development of high-speed railway, the geometrical dimensions of railway lines are getting higher and higher, especially in the fork region, which has higher requirements on the control of subsidence of the lines. Therefore, it is a difficult point in the construction how to control the subsidence of the subgrade during the construction of bridge and culverts in the construction of fork groups. The article concludes with a case study on the construction of the drainage culvert of the viaduct viaduct under the north viaduct in Chengdu crossing the K1 + 430 railway reinforcement project of Chengdu-Chongqing line.