跨铁路既有桥梁拆除设计方案——以S104线上跨京广铁路詹店立交桥改造工程为例

The Design Scheme for the Demolition of Existing Bridges Across Railways——Taking the Reconstruction Engineering of Zhandian Overpass Across Beijing-Guangzhou Railway on S104 Line as an Example

随着社会经济的发展,人们对交通出行的需求越来越高。早期建设的桥梁技术标准较低、承载力不足,部分既有桥梁病害较多,严重阻碍了当地经济发展,影响道路通行能力和服务水平。文章以S104线上跨京广铁路詹店立交桥改造工程为例,在确保桥下既有京广铁路运营安全的前提下,通过分析既有危桥拆除的特点和难点,采用“先上后下,先小后大,借助小型机械,人工拆除”的稳步方案,实现桥梁原址重建,以改变当地出行条件,为当地百姓提供更安全、便捷、经济的服务,为经济发展作出贡献。

With the development of social economy,people's demand for transportation is increasing.The technical standards of bridges built in the early stage are low,the bearing capacity is insufficient,and some existing bridges suffer many diseases,which seriously hinder the local economic development and affect the road traffic capacity and service level.Taking the reconstruction engineering of Zhandian overpass across Beijing-Guangzhou Railway on S104 line as an example,under the premise of ensuring the safety of the operation of the existing Beijing-Guangzhou Railway under the bridge,by analyzing the characteristics and difficulties of the demolition of the existing dangerous bridge,the steady scheme of"first up and then down,first small and then big,with the help of small machinery,manual demolition"is adopted to realize the reconstruction of the bridge on the original site,so as to change the local travel conditions,provide safer,more convenient and economic services for local people,and contribute to economic development.