平潭海峡北东口水道特大桥总体设计  

Overall Design of Pingtan Straits Northeast Mouth Sea-Crossing Bridge

作　　者：宋子威[1] 杨利卫[1] 王德志[1] SONG Zi-wei;YANG Li-wei;WANG De-zhi(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,Chin)

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063

出　　处：《世界桥梁》2018年第4期1-5,共5页World Bridges

摘　　要：平潭海峡北东口水道特大桥连接大练岛与平潭岛,跨平潭海峡北东口水道,全长3.713km。该桥自然环境恶劣,桥位区浪高、流急,地质条件复杂,海洋腐蚀环境高,航道繁忙,有效作业时间短。主航道桥采用(92+2×168+92)m混凝土连续刚构,引桥采用64m简支梁或连续梁。主梁均采用双幅公路桥在上、铁路桥在下公铁合建的倒品字形布置,下部结构采用门式框架墩形式,钻孔桩基础。铁路简支梁采用节段预制拼装法施工,主航道桥及公路连续梁桥采用悬臂法施工。为确保工程设计寿命不小于100年,采用了高性能混凝土、增加混凝土保护层厚度、混凝土表面涂装、外加电流阴极保护等耐久性设计。The Pingtan Straits Northeast Mouth Sea crossing Bridge links the Dalian Island and Pingtan Island. The bridge crosses the northeast mouth of Pingtan Straits and has a total length of 3. 713 km. The construction of the bridge is threatened by harsh natural environment and the effective construction time is short, due to the limitations imposed by high waves, fierce torrents, complicated geological condition, severe sea eroding environment and busy shipping channel. The main navigational channel bridge is a concrete continuous rigid frame bridge with spans of 92, 2）〈168, and 92 m. The approach bridge adopts the simply supported, or continuous beam bridge with spans of 64 m. The main girder is an inversely arranged ＂品＂ shaped structure that carries double decks（upper highway deck and lower railway deck）. The substructure consists of portal shaped frame piers sitting on bored pile foundations. The simply supported railway beams are erected by segmental assembly method, while the main navigational channel bridge and the highway continuous beam bridge are erected by cantilever construction method. To assure that the design life of the project is no less than 100 years, measures are taken to enhance its durability, such as using the ultra high performance concrete, increasing the thickness of concrete cover, coat ing the concrete surface and adding impressed current cathodic protection.

关 键 词：列宁 人本思想 以人民为中心 

分 类 号：U448.121[建筑科学—桥梁与隧道工程] U448.21[交通运输工程—道路与铁道工程]