秦沈客运专线桥梁综述及高速铁路桥梁建设的思考

秦沈客运专线是我国已建成的第一条时速 2 0 0km的客运专线 ,并于 2 0 0 3年 10月投入正式运营。其桥梁结构采用了许多新的结构形式 ,如大规模采用有碴桥面箱形简支梁 ,有针对性地采用钢混结合连续梁 ,部分地段采用无碴轨道预应力混凝土梁 ,这些结构形式的桥梁较以往普通铁路桥梁的纵横向刚度有较大的提高 ,注重了桥梁的耐久性和少维修。在架设方法上 ,也突破了以往的先铺轨后架梁的施工方法 ,大吨位的架桥机、造桥机成功地应用于 2 0～ 3 2m单、双线箱梁的架设。对高速铁路的桥梁结构设计、施工有针对性地提出了相关的建议 ,并对今后我国高速铁路和客运专线桥梁建设技术进行了展望

A Summary of Bridges on QinShen Passenger Dedicated Railway and Pondering over Bridge Construction for High-speed Railway

Qinhuangdao-Shenyang Passenger Dedicated Railway is the first passenger dedicated railway ever built in China reaching the speed of 200 km/h, and was put into operation in October 2003. Many new bridge structures were adopted, for example, the extensive use of ballasted deck simple support box girder, the use of steel-concrete composite continuous girder for specific purpose, and the use of ballastless track PC girder at certain sections. Compared to conventional railway bridges, the new structures increase the longitudinal and transversal rigidity of bridges, and improve the durability and reduce maintenance. In the meantime, heavy duty bridge girder erecting equipment and bridge fabrication machine were successfully used for erection of 20-30m single track and double track box girder, a breakthrough in conventional method of girder erection after track laying. Relevant suggestions about structural design of bridges for high-speed railway and its construction were raised, and a prospect of bridge construction technology for high-speed railway and passenger dedicated railway in China was given.