分层地基环境下海上风电大直径单桩基础水平承载特性分析  

Analysis on Horizontal Bearing Capacity of Large-diameter Monopile Foundation for Offshore Wind Power under Stratified Foundation Environment

作　　者：周茂强 苏浩然 和庆冬 苏凯[2,3,4] ZHOU Maoqiang;SU Haoran;HE Qingdong;SU Kai(Zhejiang Huadong Engineering Consulting Co.,Ltd.,Hangzhou 310014,Zhejiang,China;State Key Laboratory of Water Resources and Hydropower Engineering Science(Wuhan University),Wuhan 430072,Hubei,China;Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering(Ministry of Education),Wuhan University,Wuhan 430072,Hubei,China;Hubei Provincial Key Lab of Water System Science for Sponge City Construction(Wuhan University),Wuhan 430072,Hubei,China)

机构地区：[1]浙江华东工程咨询有限公司,浙江杭州310014 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [3]武汉大学水工岩石力学教育部重点实验室,湖北武汉430072 [4]武汉大学海绵城市建设水系统湖北省重点实验室,湖北武汉430072

出　　处：《水力发电》2022年第7期109-114,共6页Water Power

摘　　要：依托某海上风电项目,针对几种典型地层条件通过数值方法研究分层地基环境下单桩水平承载性能影响因素并进行参数敏感性分析。首先,在用钢量恒定情况下,桩径对单桩水平承载力影响最大,且这种影响随着桩径增大而显著增大;其次,随着埋深的增大,水平承载力先增大而后趋于稳定;再次,桩周浅层土体弹模对桩基承载力亦影响较大,且桩径越大,其影响越明显且不能通过增加埋深来抵消。与均质地层相比,水平承载力在上劣下优地层中下降最为明显,在上优下劣及中夹差土地层中降幅较小。实际工程中除增大桩径或桩长,亦可对单桩周边浅层土体进行加固以提高水平承载性能。Based on an offshore wind power project, the influence factors of horizontal bearing capacity of monopole in stratified foundation environment are studied by numerical method and the parameter sensitivity analysis is conducted according to several typical stratum conditions. When the amount of steel used is constant, the pile diameter has the greatest influence on the horizontal bearing capacity of monopile, and the influence increases significantly with the increase of pile diameter. Secondly, with the increase of buried depth, the horizontal bearing capacity increases first and then tends to be stable. Thirdly, the shallow soil elastic model around the pile also has a great influence on the bearing capacity of the pile foundation, and the larger the pile diameter is, the more obvious the influence is, which cannot be offset by increasing the buried depth. Compared with the homogeneous layer, the horizontal bearing capacity decreases most obviously in the upper inferior and lower superior layer, and the decrease is smaller in the upper superior and lower inferior layer and the middle sandwiched layer. In practice, in addition to increasing the pile diameter or pile length, the shallow soil around the momopile can be strengthened to improve the horizontal bearing capacity.

关 键 词：海上风电 单桩基础 快速建模 水平承载特性 参数敏感性分析 分层地基 

分 类 号：TU391[建筑科学—结构工程]