摘要
[目的]自升式风电安装船作为海上风电开发中的重要施工设备,研究其在位状态下的承载性能对于保障风电安装船作业安全尤为重要。[方法]文章以自升式安装船为研究对象,结合室内模型试验和有限元法开展了均质砂土中4种不同的桩靴贯入深度下的水平承载性能以及周围土压力变化规律研究。[结果]研究表明:随着贯入深度的增加,自升式安装船的水平承载力呈近似线性增长趋势,贯入深度为10 cm较贯入深度4 cm水平承载力增加了38.02%,其对应的水平位移同样呈现增加的趋势,在水平荷载作用下,桩靴的承载模式表现为临载侧桩靴受压,背载侧桩靴受拉。桩靴表面同侧土压力变化规律一致,当贯入深度为10 cm时,临载侧桩靴底的土压力变化最大值为38.37 kPa,较贯入深度为4 cm时增大了126.2%。且临载侧桩靴下表面和背载侧桩靴上表面的土压力变化较大。[结论]水平荷载作用下自升式安装船的受力模式为拉压模式,且砂土中桩靴贯入深度的增加,能显著提高水平承载性能,为保障风电安装船的安全和作业能力,需保障桩靴的贯入足够的深度。
[Introduction]As an important construction equipment in the development of offshore wind power,studying the bearing performance of the jack-up vessel for wind turbine installation in the in-situ state to ensure its operation safety is of great significance.[Method]In this paper,taking the jack-up installation vessel as the research object,the horizontal bearing performance of the jack-up installation vessel and the variation law of the surrounding earth pressure at four different penetration depths of spudcans in homogeneous sandy soil were studied by combining with the indoor model tests and finite element method.[Result]The results show that with the increasing of the penetration depth,the horizontal bearing capacity of the jack-up installation vessel is on an approximate linear growth trend.The penetration depth of 10 cm led to an increase of the horizontal bearing capacity by 38.02%compared with 4 cm penetration depth,and the corresponding horizontal displacement also show an increasing trend.Under the action of horizontal loads,the bearing mode of spudcans is characterized by compression of spudcans on the loading side and tension of spudcans on the non-loading-side.The pressure change law of the soil on the surface of spudcans is the same.At the penetration depth of 10 cm,the maximum variation in soil pressure at the bottom of spudcans on the loading side is 38.37 kPa,which increased by 126.2%compared to the penetration depth of 4 cm.In addition,significant variations in soil pressure are observed on the lower surface of the loading-side spudcans and the upper surface of the non-loading-side spudcans.[Conclusion]Under the action of horizontal load,the force mode of the jack-up installation vessel is the tension-compression mode,and increasing the penetration depth of spudcans in sandy soil can significantly enhance the horizontal bearing capacity.Therefore,in order to ensure the safety and operational capability of the wind turbine installation vessel,it is necessary to ensure sufficient penetration depth o
作者
王凯
武宗豪
韩若朗
乐丛欢
麦志辉
吴韩
WANG Kai;WU Zonghao;HAN Ruolang;LE Conghuan;MAI Zhihui;WU Han(School of Ocean Engineering and Technology,Sun Yat-Sen University,Zhuhai 519082,Guangdong,China;State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China;Guangdong Keen Offshore Engineering Co.,Ltd.,Foshan 528000,Guangdong,China;Guangdong Lesso Keen Science and Technology Co.,Ltd.,Foshan 528226,Guangdong,China)
出处
《南方能源建设》
2023年第4期1-10,共10页
Southern Energy Construction
基金
广东省促进经济发展专项基金“海上风电综合利用平台研制及示范应用”(粤自然资源合[2022]23号)
广东省基础与应用基础研究基金委,海上风电联合基金项目-重点项目“海上漂浮式风电与海洋牧场融合关键技术及其生物适应性研究”(2022B1515250005)。
关键词
砂土
自升式安装船
贯入深度
水平承载特性
有限元模型
sandy soil
jack-up installation vessel
penetration depth
horizontal bearing characteristics
finite element model
