低桩承台直立结构在海堤工程中的应用  

Application of low pile platform vertical structure in sea embankment project

作　　者：刘堃[1] 吴争光[2] LIU Kun;WU Zheng-guang(CCCC-FHDI Engineering Co.,Ltd.,Guangzhou 510230,China;Shenzhen Land Investment Development Center,Shenzhen 518026,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510230 [2]深圳市土地投资开发中心,广东深圳518026

出　　处：《水运工程》2018年第9期76-80,共5页Port & Waterway Engineering

摘　　要：针对深圳机场三跑道海堤工程场地软弱土层深厚,海堤建设需要满足对广深沿江高速的位移限制要求,且海堤堤顶高程不能超过15 m安全限高线等系列问题,提出低桩承台直立式海堤结构,并采用水泥搅拌桩进行基础加固处理。采用经验公式并通过波浪物理模型试验确定合理的堤顶高程,且采用国际通用软件Plaxis 3D进行结构受力分析,证明该海堤方案能有效控制土体侧向变形。针对海堤需满足使用100 a的防腐问题,钢结构采用重防腐蚀涂层、牺牲阳极阴极保护和混凝土包覆联合防腐措施,确保海堤满足设计保护年限。Aiming at the problem of the sea embankment of the Third Runway Project of Shenzhen Bao’an International Airport,such as soft soil layer is deep and thick,the construction needs to meet the demands of displacement constraint over Guangzhou-Shenzhen Riverine Expressway,and the top elevation of the sea dike cannot surpass the 15 m safety limit line,we propose the low pile platform vertical structure,and utilize cement mixing pile in the ground treatment.We reasonably determine the top elevation of the sea embankment according to the empirical formula and wave physical model tests,and adopt Plaxis 3D software(internationally accepted software)in structure force analysis,which proves that this sea embankment scheme can effectively control the lateral deformation of the soil.In view of the anti-corrosion problem that the sea dike needs to be used for 100 years,we use the heavy anti-corrosion coating,sacrificial anode and concrete coating joint anti-corrosion measures in steel structure,so as to ensure the design protection period of the sea dike.

关 键 词：低桩承台 水泥搅拌桩 物理模型试验 Plaxis3D软件 有限元分析 土体侧向变形 防腐措施 

分 类 号：U656.2[交通运输工程—港口、海岸及近海工程]