某海底隧道下穿海湾大桥连接线匝道桥安全性评估  

Safety Evaluation of the Undersea Tunnel Underpass Ramp Bridge of the Bay Bridge Connecting line

作　　者：马宇平 MA Yu-ping(Guangdong Communication Planning&Design Institute Group Co.,Ltd.,Guangzhou 510507,Guangdong,China)

机构地区：[1]广东省交通规划设计研究院集团股份有限公司,广东广州510507

出　　处：《广东交通职业技术学院学报》2022年第4期67-71,共5页Journal of Guangdong Communication Polytechnic

摘　　要：为研究隧道下穿既有桥梁时对桥梁安全的影响,以某海底隧道下穿海湾大桥连接线匝道桥为依托,对海底隧道下穿桥梁采用桩基托换方案进行MIDAS有限元受力分析,并根据《公路桥梁和隧道工程设计安全风险评估指南》(试行)进行安全性评估;结合工程实例,对设计和施工方案提出合理建议,以提高工程施工的安全性,为类似工程建设提供参考借鉴。In order to study the impact on bridge when the tunnel underpass the existing bridge,based on the ramp bridge of the connecting line of the undersea tunnel undercrossing the Gulf Bridge,the stress analysis of the undersea tunnel undercrossing bridge is carried out by using MIDAS finite element method with pile foundation underpinning scheme.Safety assessment is carried out according to the“Highway Bridge and Tunnel Engineering Design Safety Risk Assessment Guide”(Trial).Combining with engineering examples,this paper puts forward reasonable suggestion to the design and construction scheme for improving the safety of engineering construction,and providing reference for similar engineering construction.

关 键 词：隧道下穿 既有桥梁 桩基托换 安全性评估 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]