桥梁建设2015年第45卷第2期（总第231期）
Bridge Construction,Vol. 45，No.2,2015 (Totally No.231)
文意编号：1003—4722(2015)02—0099-06
武汉市姑嫂树路跨铁路桥设计方案比选
赵彬强
（武汉市政工程设计研究院有限责任公司，湖北武汉430023）
摘要：武汉市姑嫂树路主线高架需要上跨京广铁路等多条铁路线，为避免或减少施工期间及日后维护对铁路运营和地面交通的影响，研究该桥设计方案选型。考虑铁路现状及桥跨布设控
99
制条件，选择与工程实际较适宜的（65十110十65）m悬臂浇筑变截面预应力混凝土连续箱梁桥、转体施工变截面预应力混凝土连续箱梁桥、部分斜拉桥3种桥型方案进行对比分析。基于功能性和安全性的考虑，由于转体施工变裁面预应力混凝土连续箱梁桥方案仅需在转体期间2～3h内封闭铁路，其余时间对铁路运营无影响，综合经济性、施工难度、养护费用等因素，最终选择采用该方案。
关键词：跨铁路桥；城市高架桥；连续梁桥；部分斜拉桥；悬臂浇筑；转体施工；方案比选
中图分类号：U448.17；U442.54
文献标志码：A
ComparisonandSelectionofDesignSchemesforGusaoshuRoad
MainLineViaductSpanningRailwaysinWuhanCity
ZHAOBin-qiang
(Wuhan Municipal Engineering Design and Researeh Institute Co., Ltd., Wuhan 430023, China)
Abstract: The Gusaoshu Road Main Line Viaduct in Wuhan City was required to span Beijing Guangzhou Railway and several other railways. To avoid or lessen the possible interference of the viaduct with the railway operation and ground traffic in the construction and future maintenance, the design schemes for the viaduct were studied. In consideration of the current situations of the railways at the viaduct site and the control conditions of span arrangement of the viaduct, 3 types of the bridge schemes that were suitable for the viaduct, i. e. the (65 +110 +65) m prestressed concrete continuous box girder bridge with variable section that was to be constructed by the canti-lever casting, the prestressed concrete continuous box girder bridge with variable section that was to be constructed by the rotation erection and the extradosed bridge, were compared and analyzed. In accordance with the requirements for the function and safety of the viaduct and also in compre hensive consideration of the factors of the economy, construction difficulties and future mainte-nance cost, the scheme of the prestressed concrete continuous box girder bridge with variable sec tion that was to be constructed by the rotation erection was finally chosen since the scheme only re quired the closure of the railways for 2~3 hours during the rotation erection and in other time, would cause no inference with the railway operation.
Key words: bridge spanning railway; city viaduct; continuous girder bridge; extradosed bridge; cantilever casting; rotation construction; scheme comparison and selection
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概述
随着各大城市规模的不断扩张，原有铁路客运
站逐步由“市郊”演变为“市中心”，成为人流、车流的
重要集散地，这既给市民出行带来便利，同时又成为城市交通新的瓶颈。修建城市快速路连接外围环线或绕城高速，分流过境交通与市区日常交通是缓解
收稿日期：2014—06-12
作者简介：赵彬强，高级工程师，E-mail，78098399@qq.com，研究方向：城市道路与桥案。