港珠澳大桥东西人工岛深埋式大圆筒岛壁结构稳定与变位模拟  

Stability and deformation characteristics of island wall formed by deep-buried large diameter steel cylinders in the east-west artificial island of Hong Kong-Zhuhai-Macao Bridge

作　　者：王婷婷[1] 卢永昌[1] 彭志豪[1] WANG Tingting;LU Yongchang;PENG Zhihao(CCCC-FHDI Engineering Co.,Ltd.,Guangzhou 510230,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司

出　　处：《水科学进展》2019年第6期834-844,共11页Advances in Water Science

基　　金：国家自然科学基金资助项目(51520105014)~~

摘　　要：深埋式大直径钢圆筒是一种新型海工结构,目前尚未有公众一致认可的结构稳定性分析方法,严重阻碍了大直径钢圆筒结构在实际工程中的推广使用。为进一步完善新型结构的理论基础,研究结合港珠澳大桥人工岛工程实例,基于PLAXIS 3D分析平台,针对深埋式大直径钢圆筒岛壁结构开展三维弹塑性建模分析。研究结果表明:当大直径钢圆筒结构深埋于软黏土地基时,圆筒顶部水平位移相对较大,但其整体稳定性可以获得较大提升。数值模型计算分析的方法与基于OCDI的平面分析理论相结合,并通过实际工程案例中测量数据的验证,最终形成一套可靠的深埋式大直径钢圆筒抗剪抗滑稳定性计算方法和判别标准,并对钢圆筒结构用于港口水工建筑物的适用性提出了原则性建议。研究成果可为类似工程的设计与优化提供理论依据和参考实例。As one kind of innovative marine structure,there still not exist public recognized stability analysis theory and practical method for the deep-buried large diameter steel cylinder yet,which seriously blocked the popularization and application of large diameter steel cylinder structure in practical engineering implementation.In order to further improve the theoretical basis of the new structure,this paper carried out three-dimensional elastic-plastic modeling analysis of deep-buried large diameter steel cylinder which is used as wall structure of artificial island in the project of Hong Kong-Zhuhai-Macao Bridge based on PLAXIS 3-D software.The research results show that the horizontal deformation is relatively enlarged,but the overall stability can be greatly improved when the large diameter steel cylinder structure is deeply buried in soft clay foundation as the artificial island wall,.Combining the numerical simulation results and the theoretical plane strain analysis method provided by OCDI standard,a reliable shear and sliding stability calculation method is finally summarized with one set of quantitative evaluation criteria by verifying the measured data of deep-buried large diameter steel cylinder in the practical engineering of the east-west island of Hong Kong-Zhuhai-Macao Bridge.The research results also provode principle suggestions of the applicability of steel cylinder structure to port engineering,which can provide theoretical basis and Engineering reference for the design and optimization of similar constructions.

关 键 词：海洋工程 深埋式 大直径圆筒 岛壁结构 建模研究 稳定性 

分 类 号：P753[交通运输工程—港口、海岸及近海工程]