高速铁路穿越断裂带地段路基设计方法探讨

结合青荣城际铁路工程实际,介绍穿越断裂带地段路基概况及工程地形地貌、地层岩性、地基变形分析方法等,并根据本线为有砟轨道特点,提出路基工程设计应按照保证非地震情况下路基变形满足安全运营要求,采取加宽路基、放缓边坡及柔性加筋路基结构形式、加强防排水、进行变形监测等工程措施,使断裂带区域内路基能适应断裂带变形、易修复和留有修复条件,降低风险,节省投资。

An Approach to Subgrade Design Methods for High Speed Railway Passing through Fault Zone

With reference to the engineering practices in Qing ~ Rong intercity railway,this paper introduces the general conditions of the line subgrade,the landform,the formation lithologic and the analysis of ground settlement in passing through fault zone. The requirements are proposed for subgrade deformation in non-earthquake situation to ensure safe train operation on ballasted track by widening subgrade,easing slope,reinforcing the subgrade with flexible bars,improving drainage and deformation monitoring to make the subgrade in fault zone adaptable to the deformation,easy to be maintained with reservations for future maintenance. Thus,risk is reduced and investment is saved. projects.