新安江特大桥设计关键技术研究  

Research on Key Technologies for the Design of Xin’an River Bridge

作　　者：张扬 王冰 郭波 ZHANG Yang;WANG Bing;GUO Bo(China Railway Fifth Survey and Design Institute Group Co.Ltd.,Beijing 102600,China)

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《铁道建筑技术》2023年第7期81-84,共4页Railway Construction Technology

基　　金：中铁第五勘察设计院集团有限公司科技研发计划项目(T5Y2020-B03)。

摘　　要：金建铁路新安江特大桥设计为(112+216+112)m预应力混凝土矮塔斜拉桥,采用外倾式钢筋混凝土桥塔。对新安江特大桥结构体系选型、桥塔和拉索设计关键技术以及全桥第一、第二类稳定问题进行深入研究。研究结果表明:新安江特大桥采用塔墩固结、塔梁分离,设置固定支座的支承体系,合理释放温度力同时,保证结构刚度;外倾塔肢线形优美,同时满足运梁车过梁空间需求,通过设置临时钢拉杆有效保证塔肢施工过程受力良好;在施工及成桥各工况下,考虑不同初始偏位情况,新安江桥第一、第二类稳定系数均满足要求,结构稳定性良好。The Xin'an River Special Bridge of Jinhua to Jiande Railway is designed as(112+216+112)m prestressed concrete low tower cable-stayed bridge,which adopts an outward tilted reinforced concrete tower.This paper conducts in-depth research on the selection of the bridge structural system,the key technologies of bridge tower and cable design,and the first and second stability problems of Xin'an River Special Bridge.The results show that the Xin'an River Special Bridge adopts the support system of tower pier consolidation,tower beam separation and fixed support,which can reasonably release the temperature force and ensure the structural stiffness.The leaning tower limb has a beautiful linear shape,and at the same time meets the space requirements of the lintel of the beam truck.The temporary steel tie rod is set to effectively ensure the good force of the tower limb during the construction process.Considering different initial deflection conditions,the stability coefficients of the first and second types meet the requirements under various working conditions of construction and completion of the bridge,and the structural stability is good.

关 键 词：高速铁路 矮塔斜拉桥 支承体系 稳定性 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]