串联锚在黏土中的三向受荷承载力分析  

Bearing capacity analysis of piggy-backed anchors under three-dimensional loading in clay

作　　者：杨明云 陈川 赖莹 陈云敏[1] YANG Ming-yun;CHEN Chuan;LAI Ying;CHEN Yun-min(College of Civil Engineering,Zhejiang University,Hangzhou,Zhejiang 310058,China)

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058

出　　处：《岩土力学》2025年第2期582-590,共9页Rock and Soil Mechanics

基　　金：国家自然科学基金(No.52279112)。

摘　　要：大力发展可再生能源已成为世界各国的共识,其中的重要方向之一是海上风电。海上风机上部结构所受的风、浪、流等复杂环境荷载最终由锚固基础承担,因此锚固基础的承载性能在确保整个系统的服役稳定性中起着决定性作用。串联锚是一种新型混合锚,由两个或多个传统锚板(如拖曳锚或法向承力锚)组合而成,具有安装成本低、锚固效率高、可重复使用和承载能力高等优点。提出了串联锚的塑性极限分析上限解可以快速预测串联锚的承载能力,发现不排水抗剪强度梯度k并不会对承载能力系数产生影响。在耦合荷载的影响下,串联锚的法向抗力主导了承载力的大小,切向荷载与旋转扭矩的发挥机制与单一锚板区别不大。服役过程中,串联锚相对于单个锚板需要更大的位移来调动其极限承载能力。The rapid development of renewable energy has become a global consensus,with offshore wind power as a key focus.The upper structures of offshore wind turbines are subjected to complex environmental loads,including wind,waves,and currents,ultimately supported by the anchoring foundation.Therefore,the bearing performance of the anchoring foundation plays a decisive role in ensuring the service stability of the entire system.The piggy-backed anchor is a novel hybrid anchor consisting of two or more traditional anchor plates,such as drag anchors or vertical load anchors.It offers advantages such as low installation cost,high anchoring efficiency,reusability,and high bearing capacity.The paper proposes an upper-bound solution for the plastic limit analysis of piggy-backed anchors to quickly predict their bearing capacity.This study found that the undrained shear strength gradient k does not affect the bearing capacity coefficient.Under the influence of coupled loads,the normal resistance of the piggy-backed anchor predominantly determines the bearing capacity,while the mechanisms of tangential loads and rotational torque are similar to those of a single anchor plate.During service,the piggy-backed anchor requires a larger displacement to mobilize its ultimate bearing capacity compared to a single anchor plate.

关 键 词：串联锚 黏土 相互干扰 塑性 极限分析法 数值模拟 

分 类 号：TU442[建筑科学—岩土工程]