公铁并行段大跨径桥梁桥型方案研究  

Conception and Comparison of Long-Span Bridge for Highway Parallel with Railway

作　　者：熊洪波 XIONG Hongbo(Guangdong Architectural Design and Research Institute Group Co.,Ltd.Guangzhou 510010,China)

机构地区：[1]广东省建筑设计研究院集团股份有限公司,广州510010

出　　处：《广东土木与建筑》2024年第11期66-69,共4页Guangdong Architecture Civil Engineering

摘　　要：随着我国公路、铁路基础设施建设的蓬勃发展,土地及过江通道资源稀缺性日益突出,高速公路与铁路不得不在局部路段并行。公铁并行段新建高速公路桥梁桥型方案的合理选取对既有铁路营运安全与否会产生重大的影响。基于上述背景并结合南新高速西江特大桥,介绍了在公铁并行段铁路、航道、水利等复杂要求情况下,比选了矮塔斜拉桥、刚构-拱桥、PC连续刚构桥及混合梁连续刚构各自适用性。鉴于混合梁刚构方案桥面以上无高耸结构物,施工及运营过程中基本不会对既有铁路安全运营产生不利影响,且混合梁刚构方案对既有铁路桥景观影响相对较小,加之钢混结合段应用成熟,从而最终确定该公铁并行路段新建桥梁采用混合梁连续刚构方案。可为类似桥梁方案构思提供一定的参考。With the booming development of China's highway and railway infrastructure construction,the scarcity of land and river crossing resources has become increasingly prominent,therefore highways and railways have to be parallel in some sections.The reasonable selection of bridge type schemes for new highway bridges parallelled with railways will have a significant impact on the safety of existing railway.Based on the above background and combined with the Xijiang Bridge of Nanxin Expressway,introduces the considerations of bridge type schemes under the complex requirements of railways,waterways,water conservancy,etc.In the parallel sections of highways and railways.This paper compared the applicability of extra-dosed bridges,rigid frame-arch bridges,PC continuous rigid frame bridges,and hybrid girder continuous rigid frames.Considering that there are no towering structures above the bridge deck in the hybrid girder continuous rigid frames scheme,the construction and operation process will basically not have adverse effects on the safe operation of the existing railway bridge.In addition,the hybrid girder continuous rigid frames scheme has a relatively small impact on the landscape of the existing railway bridge.Futhermore,the application of hybrid girder is mature.Therefore,it is ultimately decided to use thybrid girder continuous rigid frames scheme for the new bridge in the parallel section of the highway and railway.It also provides a certain reference for the design of similar bridges.

关 键 词：桥梁工程 公铁并行 西江特大桥 桥型方案 方案比选 

分 类 号：U442.54[建筑科学—桥梁与隧道工程]