东海大桥桥墩桩基冲刷分析及防护关键技术  

Analysis of scour around piles supporting piers of Donghai Bridge and key technology of protection

作　　者：黄建玲 蔡威 阮春生 HUANG Jian-ling;CAI Wei;RUAN Chun-sheng(CCCC Third Harbor Consultants Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]中交第三航务工程勘察设计院有限公司,上海200032

出　　处：《中国港湾建设》2023年第7期66-71,共6页China Harbour Engineering

摘　　要：东海大桥是连接洋山深水港与上海芦潮港的唯一跨海大桥通道,对上海港的发展起着至关重要的作用。大桥主要受潮汐、波浪及钱塘江和长江径流影响,自2005年建成以来,根据历次多波束扫测,部分大桥桥墩桩基发生较大冲刷,冲刷深度已超过设计预设的警戒值。为保证大桥安全,通过模型试验结合试验段工程实施结果,对冲刷防护技术进行优化总结,提出核心防护区采用袋装碎石抛填,顶部采用袋装混凝土湿混料覆盖防护,大桥两侧采用混凝土联锁片软体排护滩的防护关键技术,可为类似工程桩基冲刷防护提供参考和借鉴。Donghai Bridge is the only cross-sea bridge connecting Yangshan Deep-water Port and Luchao Port of Shanghai,which plays a vital role in the development of Shanghai Port.Due to the influence of tides,waves and runoff from the Qiantang River and the Changjiang River,some piles supporting the piers of the bridge have been scoured greatly and the scour depth has exceeded the design warning value since its completion in 2005,based on various multi-beam scans.In order to ensure the safety of the bridge,the scour around the piles and their protection are analyzed and studied through model testing together with trial remediation works.In this paper,optimization and summary of the scour protection technology are made according to the results of the analysis and research.A key technology is proposed that the core area for protection is protected by bagged gravel and the top is protected by bagged wet mixed concrete,and the two sides of the bridge is protected by a soft mattress of concrete interlocking blocks.The protection technology can provide reference for scour protection of similar pile foundations.

关 键 词：跨海大桥 桥墩桩基 冲刷 防护 

分 类 号：U656.113[交通运输工程—港口、海岸及近海工程]