大跨度四线铁路高低塔混合梁斜拉桥桥塔设计  

Design of Pylons of Long-span Four-line Railway Cable-stayed Bridge with Unequal-height Pylons and Hybrid Girder

作　　者：任征[1] REN Zheng(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,Chin)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《铁道标准设计》2018年第8期68-73,共6页Railway Standard Design

基　　金：中国铁路总公司科技研究开发计划项目(2016G002-1);中铁第四勘察设计院集团有限公司科研课题(2017K005)

摘　　要：福厦高铁乌龙江特大桥孔跨布置为(72+109+432+56+56)m,是国内外首次设计的高速铁路大跨度四线铁路高低塔混合梁斜拉桥。为优化桥塔设计,通过对桥塔塔形、刚度、塔高匹配、索塔锚固体系等方面进行研究分析,提出合理的设计思路、方法,确定花瓶形塔形和合理的高低塔桥塔设计。受力分析表明,桥塔受力性能均满足规范要求。Wulongjiang extra-large bridge on Fuzhou-Xiamen PDL Railway with span（ 70＋109＋ 432 ＋ 56 ＋ 56） m is the first ever designed long-span four-line railway cable-stayed bridge inthe world with unequal-height pylons and hybrid girder. In order to optimize the design of pylons,comparison and analysis are conducted of the pylon shape, stiffness, matching height and pylon anchorage system,reasonable design concept and method are put forward,and the vase-shape and reasonable design of the pylons are determined. The results of analysis indicate that the mechanical behavior of the pylons meets the requirements of the codes.

关 键 词：铁路桥 高低塔斜拉桥 混合梁 桥塔 塔形 桥塔刚度 设计 

分 类 号：U448.13[建筑科学—桥梁与隧道工程]