铁路客运专线相关技术研究

Related Technologies for Railway Passenger-dedicated Line

铁路客运专线技术新,标准高,工程庞大,系统复杂。经研究和论证,提出客运专线建设总体技术路线,分析了铁路客运专线在速度目标值、线路平纵段面、路基工程、桥梁工程、隧道工程、轨道工程、站场等方面的主要技术特点,并围绕无砟轨道和高速道岔设计理论等方面的关键技术开展研究。通过采用CFG桩、预应力管桩等设计和工程措施,控制路基沉降,建立路基沉降变形精测系统网,定期观测与评估。对桥梁基础沉降与梁的徐变,采取基础沉降控制、预应力混凝土梁徐变变形控制和区域沉降地区的桥梁沉降控制等措施。隧道施工采用台阶法、交叉中隔壁法和双侧壁导坑法,衬砌采用复合式衬砌或整体式衬砌。

Railway passenger-dedicated line requires cutting-edge technologies and high standard therefore is a systematic and compli- cated project. After research and studies, the thesis proposes an overall technical principle for PDL construction and meanwhile analyzes the major technical characteristics of PDL in terms of speed, profile and cross section of track, sub-grade engineering, bridge engineer- ing, tunnel engineering, track engineering and railway yard and proceeds with the elaboration by focusing on some key PDL technologies like ballastless track and high speed turnout. Some engineering measures like CFG pile and pre-stressed drilled pile shall be adopted to control the sub-grade settlement. A settlement and deformation inspection system shall be established to make observation and evalu- ation regularly. Foundation settlement control, pre-stressed concrete girder creep and deformation control and bridge settlement control shall also be implemented to prevent bridge foundation settlement and girder creep. Tunnel project shall adopt step-by-step method, CRD method and double side-pilot method and lining shall be composite lining or integral lining.