马鞍山长江公铁大桥副汊航道桥设计研究  

Study on the Design of Auxiliary Channel Bridge of Ma'anshan Yangtze River Rail-cum-road Bridger

作　　者：方绪镯[1] FANG Xuzhuo(China Railway Major Bridge Reconnaissance&Design Institute Co Ltd,Wuhan Hubei 430050,China)

机构地区：[1]中铁大桥勘测设计院集团有限公司,湖北武汉430050

出　　处：《中国铁路》2021年第9期167-172,共6页China Railway

摘　　要：巢马高铁马鞍山长江公铁大桥副汊航道桥为4线铁路+6车道城市快速路多通道桥梁,根据通航及防洪要求,采用392 m一孔跨越太平府水道。对不同桥型方案比选研究,采用(56+168+392+168+56)m=840 m的钢桁梁斜拉桥。对斜拉桥约束体系、主梁、主塔、桩基直径等方案详细研究比选,采用半漂浮体系,主桁采用3片主桁断面,主塔结构形式为A形,基础采用2.8 m的钻孔灌注桩。通过研究脱轨系数、轮重减载率及轮轨横向力等,确定采用的桥梁方案满足列车运行安全性;通过Sperling指标计算,确定采用的桥梁方案满足乘坐舒适性要求。The auxiliary channel bridge of the rail-road bridge over the Yangtze River in Ma'anshan section of Chaohu-Ma'anshan HSR is a 4-track railway plus a 6-lane urban expressway.According to the requirements of navigation and flood control,the 392-meter single-span arrangement was adopted to cross the Taipingfu Waterway.Based on the comparison and study of different bridge types,the steel truss girder cable-stayed bridge type with(56+168+392+168+56)m=840 m was selected.Through the detailed study and comparison on the restraint system,girder,main pylon and pile foundation diameter of the cable-stayed bridge,a semi-floating system was adopted,with the main truss composed of three sections,the main tower in A-shaped structure and 2.8 m bored cast-in-situ pile as the foundation.By studying the derailment coefficient,rate of wheel load reduction and lateral wheel-rail force,it is determined that the bridge scheme adopted meets the safety requirements of train operation;through Sperling index calculation,it is confirmed that the adopted bridge scheme meets the requirements of ride comfort.

关 键 词：巢马高铁 马鞍山长江公铁大桥 高速铁路桥 斜拉桥 约束体系 主梁 主塔 

分 类 号：U24[交通运输工程—道路与铁道工程]