斜顶板桩承台接岸结构优化设计  

Optimization of design for bulkhead structure with inclined support pile and sheet pipe pile platform

作　　者：杨旭东 马哲超 YANG Xudong;MA Zhechao(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：《水运工程》2024年第6期211-217,共7页Port & Waterway Engineering

摘　　要：针对斜顶板桩承台接岸结构造价较高的问题,结合洋山港区实际应用情况进行优化设计研究。采用与已建结构相同的计算方法进行使用条件和结构受力特点的对比分析,得出类似结构在软土地基的大型集装箱码头中应用可以显著优化结构。采取分级实施墙后棱体、取消后排支撑桩、利用组合钢板桩优化密排钢管板桩、将承台简化为导梁等优化措施,形成一种新的半直立式接岸结构形式,即斜顶板桩结构。结果表明:斜顶板桩与下级棱体组成的独立稳定结构体系较好地适应了前期软土地基高填土的变形特点和后期上部结构的使用要求。新结构更合理地利用桩基结构承载能力,明显提高了经济性,有利于在软基地区的类似工程中推广。Aiming at the high cost of the bulkhead structure with inclined support pile and sheet pipe pile platform,combined with the practical application of the Yangshan Port area,the optimization design is studied.Using the same design calculation model as the existing structure,the use conditions and mechanical characteristics of the structure are compared and analyzed.The conclusion is drawn that the application of similar structures in large container terminals on soft soil can significantly optimize the structure.A new type of semi-vertical bulkhead structure,namely inclined top support sheet pile structure,has been formed by staging construction rock mound behind the wall,canceling the back supporting pile,using the composite sheet pile of steel pipe and steel plate optimize the closely steel sheet pile structure,optimizing the big platform as a small guide beam.The results show that the independent stable structure system composed of inclined top support sheet pile and the lower rock mound can better adapt to the earlier deformation characteristics of high fill in soft soil foundation and the use requirements of superstructure in the later period.The new structure makes more rational use of the bearing capacity of pile foundation structure and is more economical.It is conducive to the popularization of similar projects in soft foundation area.

关 键 词：斜顶板桩 接岸结构 软土地基 高填土 混合堤 

分 类 号：U65[交通运输工程—港口、海岸及近海工程]