济南市开源路公跨铁立交桥方案研究  

Research on Jinan Kaiyuan Highway Overpass over Qingdao-Jinan Railway

作　　者：周国锋 Zhou Guofeng(China Railway Ji􀆳nan Group Co.,Ltd.,Ji􀆳nan 250001,China)

机构地区：[1]中国铁路济南局集团有限公司,山东济南250001

出　　处：《铁道勘察》2020年第5期120-123,128,共5页Railway Investigation and Surveying

摘　　要：为了减小济南市开源路公跨铁项目实施对铁路运营的影响,首先对项目所处位置既有铁路、道路规划情况进行分析,因立交桥位于胶济铁路历城站西咽喉区,桥梁跨度较大,常规的转体T型刚构、转体连续梁难以满足要求,故提出双塔斜拉桥、矮塔斜拉桥、独塔斜拉桥3种方案;然后从桥梁跨度、结构体系、施工方案、施工风险、桥梁景观、后续运营及养护等方面进行综合对比分析,最终确定施工风险小、施工及运营期间对铁路影响小的双塔斜拉桥方案。研究表明,在涉铁转体斜拉桥跨度满足铁路相关要求的前提下,应选择转体吨位较小、施工风险低、运营后支座更换、换索等对铁路影响小的桥梁方案。In order to reduce the influences of Jinan kaiyuan highway overpass over Qingdao-Jinan railway without interfering the railway operation,the plan of the existing railway and road where the project is located is analyzed firstly. Since the overpass is located in the western throat of Licheng station of Qingdao-Jinan railway,the span of the overpass should be long enough which means that T-shaped rigid frame and continuous beam bridge are not feasible. Schemes including twin tower cable-stayed bridge,extra-dosed prestressed concrete bridge and single tower cable-stayed bridge are studied. Moreover,the influences of bridge span,bridge structure,construction scheme,construction risk,bridge landscape,bridge operation and maintenance are comprehensively compared and analyzed. Finally,twin tower cable-stayed bridge is adopted for its low construction risk and less impact on the existing railway during construction and operation period. The research shows that,under the premise that the span of the cable-stayed bridge crossing over existing railway meets relevant requirements,a bridge with small swivel tonnage,low construction risk,convenient bearing and cable replacement should be selected.

关 键 词：公路桥 跨线桥 转体施工 斜拉桥 桥梁方案 

分 类 号：U448.17[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]