城市桥梁采用大跨径桥台跨越地铁设计方案研究  

Research on the Design Scheme of Urban Bridges Crossing Subways with Long Span Abutments

作　　者：李炎 方万进 李真颜 LI Yan;FANG Wanjin;LI Zhengyan(Guangdong Metallurgical Architectural Design and Research Institute Co.,Ltd.,Guangzhou 510080,China)

机构地区：[1]广东省冶金建筑设计研究院有限公司,广州510080

出　　处：《广东土木与建筑》2024年第5期30-34,共5页Guangdong Architecture Civil Engineering

摘　　要：为研究改善大跨径桥台跨越地铁结构受力大的情况,以广州市黄埔区某大桥为工程背景,通过对预应力混凝土空心桥台设计方案和新型钢筋混凝土拱形桥台设计方案进行了结构受力计算分析,论证了两种桥台设计方案的安全性及合理性。计算结果表明,两种桥台设计方案都能够较好地满足结构受力要求,其中预应力混凝土空心桥台方案可在施工过程中采用台帽与桩基先铰接后固结的施工工艺来释放一部分桩顶附加弯矩,以达到更好的结构受力效果。相比较而言,新型钢筋混凝土拱形桥台设计方案的施工工艺相对简单,结构耐久性相对较好,后期养护难度相对较小。因此,推荐采用新型钢筋混凝土拱形桥台设计方案。In order to study and improve the situation of large span bridge abutmentsy crossing subway structures with high stress,takes a certain bridge in Huangpu District,Guangzhou City as the engineering background.Through structural stress calculation and analysis of the prestressed concrete hollow bridge abutment design scheme and the new reinforced concrete arch bridge abutment design scheme,the safety and rationality of the two bridge abutment design schemes are demonstrated.The calculation results indicate that both types of abutment design schemes can better meet the structural stress requirements.Among them,the prestressed concrete hollow abutment scheme can use the construction process of hinge joint between the abutment cap and the pile foundation before consolidation to release some additional bending moments at the pile top during the construction process,in order to achieve better structural stress effect.In comparison,the construction process of the new reinforced concrete arch abutment design scheme is relatively simple,the structural durability is relatively good,and the difficulty of later maintenance is relatively small.Therefore,further recommends the use of a new type of reinforced concrete arch abutment design scheme.

关 键 词：地铁 大跨径桥台 预应力桥台 拱形桥台 

分 类 号：U441[建筑科学—桥梁与隧道工程]