受铁路和用地制约的新旧城区连接道路方案设计

Scheme Design of Link Road Between New and Old Urban Districts Under Constraints of Railway and Land Use

为了研究铁路和用地制约条件下的新旧城区连接道路方案设计,提高新旧城区之间的空间联系和可达性,同时尽可能减少旧城区用地限制对项目实施的影响,结合实例,讨论了总体设计方案和重要节点设计。选用了上跨桥梁方案以满足绕避地下管线和暗渠、控制铁路沉降等要求,采用了钢箱梁作为主梁结构并采用顶推法施工以保证铁路净空,利用了桥下净空布置辅道以控制工程用地,为类似限制条件下的市政连接道路方案设计提供了经验参考。

In order to study the scheme design of link road between the new and old urban districts under the constraints of railway and land use,to improve the spatial connection and accessibility between these districts,and to minimize the impact of land restrictions in the old districts on project implementation,a case study was taken to discuss the overall design scheme and the design of important nodes.The overpass bridge scheme was chosen to meet the requirements of avoiding underground pipelines and culverts,and to control railway settlement.Steel box girder was selected as the main girder structure and the incremental launching method was proposed to ensure the railway clearance.The clearance under the bridge was used to build auxiliary road to control land use.The scheme design provides empirical reference for the design of municipal link roads under similar constraints.