哈大客运专线铁路双线单圆柱桥墩设计

Design of Double-track Cylindrical Piers on Harbin-Dalian Passenger Dedicated Line

客运专线铁路跨越河流,当斜交角度很小的情况下,常用的双线圆端形或矩形桥墩由于阻水面积大,往往不能满足河道防洪要求。结合哈大客运专线桥梁设计,提出跨河采用单圆柱桥墩设计思路,该墩型为流线形,不受水流斜交角度限制,但其自身横向刚度偏弱,重点从外形景观要求、纵横向刚度的要求、结构设计、耐久性等方面介绍单圆柱桥墩的设计过程。

When a passenger dedicated line crosses a river at a very small skew angle,the common double-track round-end pier can not meet the demands of river discharging on account of its large water blocking area.This paper,on the basis of bridge design for Harbin-Dalian Passenger Dedicated Line,introduces the design concept of using single cylindrical pier to cross a river.This type of pier is built in streamline without the limit of water flow skew angle,but the lateral stiffness is weaker.In this context,this paper introduces the design processes of single cylindrical pier with focus on the requirements of landscape,longitudinal and lateral stiffness,structural design and durability.