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工后沉降控制是京沪高速铁路路基工程设计最核心的问题。针对京沪高速铁路徐州至上海段路基工程的特点,在分析沉降控制设计关键技术问题的基础上,提出适宜的工后沉降分析方法及主要沉降控制设计方案:采用CFG桩、预应力管桩及桩板结构等进行加固。经现场施工及典型工点的沉降观测、评估,验证了其可靠性、合理性,满足了铺设CRTSⅡ型板式无砟轨道要求。
Post-construction settlement control is the core issue of the engineering design of Beijing-Shanghai high-speed railway subgrade. Aiming at the characteristics of subgrade engineering of Xuzhou-Shanghai section of Beijing-Shanghai high-speed railway, based on the analysis of the key technical problems of settlement control design, the suitable post-construction settlement analysis method and the main settlement control design scheme are proposed: CFG pile, prestressed pipe pile and Stakeboard structure for reinforcement. The site construction and typical settlement observation, assessment, verified its reliability and rationality, to meet the laying of CRTS Ⅱ type slab ballastless track requirements.