摘要
跨海桥梁一般位于河口,水深流急,对桥墩基础造成一定冲刷从而出现安全隐患。文中结合现场实测数据,采用数值模拟方法对杭州湾跨海大桥基础局部冲刷特性进行研究,结果表明,数值模拟数据与实测数据较为一致,验证了数值模拟方法的可靠性;评估了流速、流向角对流场特性、冲刷特性的影响,揭示了流速影响较大,流向角影响次之的规律。该研究为基于现场实测数据率定过的数值模拟分析,为桥梁基础安全健康评估的方法之一,可为后续冲刷防护措施的制定提供参考。
Sea-crossing bridges are generally located in estuaries with deep water and fast currents,causing certain erosion to the foundation of the bridge pier,resulting in safety hazards.Based on measured data,numerical simulation was used to investigate the local scour characteristics of Hangzhou Bay Bridge foundation.The results show that the numerical simulation data is consistent with the measured data,which verifies the reliability of the numerical simulation method.The influence of velocity and angle of current on flow field characteristics and scour characteristics is evaluated,indicating that the influence of velocity is greater than that of angle of current.This study is a numerical simulation research and analysis based on field measurement data,providing a feasible method for the safety and health assessment of bridge foundation,and a guidance for the development of subsequent protective measures.
作者
李有为
丁任盛
肖苡辀
谢德宽
孙婉静
LI Youwei;DING Rensheng;XIAO Yizhou;XIE Dekuan;SUN Wanjing(CCCC Second Harbour Engineering Company Ltd,Wuhan 430040,China;Shanghai Hangzhou Railway Passenger Dedicated Line Co.,Ltd.,Shanghai 200000,China;CCCCSHEC Fourth Engineering Company Ltd,Wuhu 241000,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan 430040,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan 430040,China)
出处
《交通科技》
2024年第5期66-71,共6页
Transportation Science & Technology
基金
中国博士后科学基金第61批面上项目(2017M612541)资助。
关键词
杭州湾跨海大桥
数值模拟
局部冲刷
河床形态
Hangzhou Bay Bridge
numerical simulation
local scour
river geomorphology
