秀山大桥深水峡道海域桩基础群自升式平台施工技术研究  

Research on construction technology of jack-up platform for Xiushan Bridge piles foundation group in deep water and strait-channel sea area

作　　者：徐洲[1] 黄剑锋 彭鹏[1] XU Zhou;HUANG Jian-feng;PENG Peng(CCCC Second Harbor Engineering Co.,Ltd.,Wuhan,Hubei 430040,China;CCCC Highway Bridges National Engineering Research Centre Co.,Ltd.,Beijing 100120,China)

机构地区：[1]中交第二航务工程局有限公司,湖北武汉430040 [2]中交公路长大桥建设国家工程研究中心有限公司,北京100120

出　　处：《中国港湾建设》2022年第5期62-66,共5页China Harbour Engineering

摘　　要：官山至秀山水道为典型深水峡道海域,水下地形起伏不平且呈“W”形,基岩裸露,岩面陡倾,岩石强度高。秀山大桥跨越峡道海域,墩位处岩面最大倾角30°,最大水深39 m,最大流速3.8 m/s,深水桩基施工钻孔平台搭设难度极大。通过比较多个桩基施工方案,对自升式平台结构强度和抗倾覆、抗滑移性能进行分析,提出了通过自升式平台构建桩基钻孔平台的施工技术,有效解决了基岩裸露、强度高、坡度陡,水深、流急、峡道效应显著海域桩基钻孔平台搭设难题,为类似工程施工提供了借鉴。Guanshan to Xiushan channel is a typical deep water and strait-channel sea area,with uneven and W-shaped underwater terrain,exposed bedrock,steep rock face and high rock strength.Xiushan Bridge crosses the strait-channel sea area,with the maximum dip angle of the rock surface at the pier position is 30°,the maximum water depth is 39 m and the maximum flow rate is 3.8 m/s.It is extremely difficult to construct the drilling platform of the pile foundation construction in deep water.By comparison of different methods for piles foundation construction,the structural strength,and anti-overturning and anti-slip performance of the jack-up platform were analyzed,and the construction technology of building pile foundation drilling platform by jack-up platform was proposed,which has effectively solved the problems of pile foundation drilling platform construction in the sea area with exposed bedrock,high strength,steep slope,deep water,high velocity of flow,and significant strait-channel effects.It can provide a reference for similar engineering construction.

关 键 词：深水 峡道效应 自升式平台 桩基 施工技术 

分 类 号：U655.5[交通运输工程—港口、海岸及近海工程]