如通苏湖城际铁路主跨240m斜拉桥设计  

Design of 240m Main Span Cable-stayed Bridge of Rutongsuhu Intercity Railway

作　　者：苏昶 SU Chang(China Railway SIYUAN Survey and Design Group Co.,Ltd,Wuhan 430063)

机构地区：[1]中铁第四勘察设计院集团有限公司桥梁院,武汉430063

出　　处：《铁道勘测与设计》2024年第3期40-44,共5页Railway Survey and Design

摘　　要：新建如通苏湖城际铁路长兴特大桥主桥采用(51+94+240+94+51)m双塔双索面斜拉桥,主梁采用预应力混凝土箱形截面,桥塔采用倒Y形混凝土索塔,空间双索面,半漂浮体系,斜拉索的索塔锚固端采用钢锚箱,斜拉索的主梁锚固端采用混凝土锚槽。结合工程实际,本文介绍了技术标准、主桥总体布置、主要结构设计,并对主桥的静力性能及抗风、抗震、车桥耦合等动力性能进行了计算分析。结果表明:该桥结构受力合理,在合适的成桥索力作用下,主桥静动力计算结果均满足规范要求,主梁后期收缩徐变变形值较小,斜拉桥桥型适用于城际铁路大跨度桥梁结构。The main bridge of the newly-built Changxing Extra Large Bridge on the Rutongsuhu Intercity Railway adopts a(51+94+240+94+51)m double tower double cable plane cable-stayed bridge.The main beam adopts a prestressed concrete box section,and the bridge tower adopts an inverted Y-shaped concrete cable tower,spatial double cable plane,and semi floating system.The anchorage end of the cable tower of the cable-stayed cable adopts a steel anchor box,and the anchorage end of the main beam of the cable-stayed cable adopts a concrete anchor groove.Based on engineering practice,detailed explanations were provided on the main technical standards,overall layout of the main bridge,and main structural design.The static performance and dynamic performance such as wind resistance,earthquake resistance,and vehicle bridge coupling of the main bridge were calculated and analyzed.The results show that the bridge structure is under reasonable stress,and with appropriate cable forces,the static and dynamic calculation results of the main bridge meet the requirements of the specifications.The later shrinkage and creep deformation values of the main beam are relatively small.The cable-stayed bridge type is suitable for large-span bridge structures on intercity railways.

关 键 词：城际铁路 混凝土斜拉桥 静动力性能 收缩徐变 结构设计 

分 类 号：U44[建筑科学—桥梁与隧道工程]