公路与市政道路下穿高铁桥梁方案设计研究  

Scheme Design of Highway and Municipal Road Underpassing High Speed Railway Bridge

作　　者：王鲁 WANG Lu(China Railway Liuyuan Group Co.,Ltd.,Tianjin 300308,China)

机构地区：[1]中铁第六勘察设计院集团有限公司,天津300308

出　　处：《中国铁路》2024年第2期62-68,共7页China Railway

摘　　要：公路、市政道路的大发展,与高速铁路相互交叉的节点工程急剧增加。如何在保证高铁安全的前提下,快速确定最优方案是前期设计阶段的一大难题。以多个下穿工程为依托,采用有限元软件进行三维数值模拟,分析影响高铁桥梁变位的多重因素,对多种设计方案进行比选分析。综合设计、监测、维修多重控制要求,建议采用监测报警值为限值进行方案设计;路线应尽量选择正交或大角度穿越高铁;路线贴近路面,优选浅挖U型槽方案;开挖较深时,需灵活选择结构形式;顶进工法较开挖现浇更具优势。As highways and municipal roads continue to experience significant development,the number of node projects intersecting with HSRs has increased considerably.The major challenge in the preliminary design stage is to efficiently determine the optimal scheme while ensuring the safety of HSRs.To address this challenge,this study uses finite element software to perform 3D numerical simulations on several underpassing projects,analyzes the factors that affect the displacement of HSR bridges and compares different design schemes.In consideration of control requirements of design,monitoring,and maintenance,it is recommended to adopt monitoring alarm value as limits for scheme design.Whenever possible,the route should intersect with the HSR orthogonally or at a large angle.If the route is in close proximity to the pavement,it is preferable to use shallow excavation through U-shaped grooves.In cases where deep excavation is required,it is essential to flexibly select the structural form.Jacking offers more advantages than excavation and casting in situ.

关 键 词：高速铁路 高铁桥梁 下穿工法 墩顶位移 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]