竖直-水平向荷载作用下窄深型筒形基础承载特性研究  

Research on loading characteristics of narrow-deep bucket foundation under the action of V-H two-dimensional load

作　　者：张岩 陈运涛[3,4,5,6] ZHANG Yan;CHEN Yun-tao(Tianjin Lingang Construction&Development Co.,Ltd.,Tianjin 300455,China;No.1 Engineering Co.,Ltd.of CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300456,China;Tianjin Port Engineering Institute Co.,Ltd.of CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300222,China;Key Laboratory of Port Geotechnical Engineering of Ministry of Communications,Tianjin 300222,China;Key Laboratory of Port Geotechnical Engineering of Tianjin,Tianjin 300222,China;CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300461,China)

机构地区：[1]天津临港建设开发有限公司,天津300455 [2]中交一航局第一工程有限公司,天津300456 [3]中交天津港湾工程研究院有限公司,天津300222 [4]港口岩土工程技术交通行业重点实验室,天津300222 [5]天津市港口岩土工程技术重点实验室,天津300222 [6]中交第一航务工程局有限公司,天津300461

出　　处：《中国港湾建设》2023年第8期34-38,共5页China Harbour Engineering

摘　　要：筒形基础最早源于深海吸力锚基础,被逐步拓展到防波堤、单点系泊基础、张力腿平台基础、海上导管架基础、海上风电等不同的海洋工程领域。采用PLAXIS岩土有限元软件,针对黏性土地基上高径比大于1的窄深型筒形基础在竖直向、水平向及V-H二维荷载作用下的地基承载特性进行分析,研究随着高径比的增长对筒形基础地基承载能力的变化规律,获得的筒形基础竖直向及水平向地基极限承载力与高径比的关系式,建立V-H复合加载模式下筒形基础破坏包络面方程,分析了不同受力条件下的地基失稳的破坏状态,可为工程应用提供参考。Bucket foundation was originated from deep-sea suction anchor foundations,and gradually expanded to different fields of ocean engineering such as breakwaters,single point mooring foundations,tension leg platform foundations,offshore jacket foundations,offshore wind power and so on.In this paper,the geotechnical finite element software of PLAXIS is used to analyze the bearing characteristics of narrow and deep bucket foundations with a height-diameter ratio greater than 1 in cohesive soil under vertical,horizontal and vertical-horizontal(V-H)two-dimensional loads,and to study the change law of bearing capacity of cylindrical foundation with the increase of the height-diameter ratio.The relationship between the ultimate vertical and horizontal bearing capacity of a foundation and the ratio of height to diameter is obtained.The failure envelope equation of a bucket foundation under V-H composite loading mode is established,and the failure state of the foundation after destabilization under different loading conditions is analyzed,which can provide reference for engineering applications.

关 键 词：筒形基础 软土地基 复合加载 稳定性 

分 类 号：U655.54[交通运输工程—港口、海岸及近海工程] TU431[交通运输工程—船舶与海洋工程]