筒内间隙及土塞对海上风电多筒导管架基础承载力影响研究  

Research on Influences of Bucket Clearance and Soil Plug on Bearing Capacities of Offshore Wind Multi-Bucket Jacket Foundation

在线阅读下载全文

作  者:练继建[1,2,3] 李昕禹 郭耀华 王海军[1,2] 杜彦仪[4] 郝华庚 Lian Jijian;Li Xinyu;Guo Yaohua;Wang Haijun;Du Yanyi;Hao Huageng(State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation,Tianjin University,Tianjin 300350,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China;Maritime College,Tianjin University of Technology,Tianjin 300384,China;Huaneng Longdong Energy Co.,Ltd.,Qingyang 745000,China;China Huaneng Group Clean Energy Research Institute Co.,Ltd.,Beijing 102209,China)

机构地区:[1]天津大学水利工程智能建设与运维全国重点实验室,天津300350 [2]天津大学建筑工程学院,天津300350 [3]天津理工大学海运学院,天津300384 [4]华能陇东能源有限责任公司,庆阳745000 [5]中国华能集团清洁能源技术研究院有限公司,北京102209

出  处:《天津大学学报(自然科学与工程技术版)》2023年第12期1244-1254,共11页Journal of Tianjin University:Science and Technology

基  金:华能集团总部科技项目-陆上新型风机基础开发及应用关键技术研究(HNKJ21-H37);国家自然科学基金资助项目(51909188)。

摘  要:多筒导管架基础结构凭借其施工便捷、适用性强、经济性优良等特点,在海上风电领域得到了广泛的应用.多筒基础结构在安装过程中,受海床平整度、区域内土质差异及筒内外渗流等影响,在基础筒体中会存在筒内间隙及筒内土塞现象,进而导致筒体有效埋深的不同,最终对服役期基础承载力产生一定的影响.本文借助室内模型试验及有限元分析的方法,研究了筒内间隙及土塞所引起的有效埋深对筒型基础承载力的影响规律.研究结果表明:通过试验对有限元进行修正后,不同工况下基础水平极限承载力模型试验结果与数值模拟结果相差在8.86%以内;多筒基础水平极限承载力随着筒内间隙高度和筒内土塞高度的增加而降低;当筒内间隙高度为0.10D、0.15D及0.20D时(D为筒型基础模型直径),水平极限承载力降低幅度分别为筒内无间隙工况的9.11%、16.72%和23.80%;当筒内土塞高度为0.10D、0.15D及0.20D时,水平极限承载力降低幅度分别为筒内无土塞工况的9.32%、17.16%和24.45%;当筒内间隙(土塞)高度为0.10D’、0.15D’及0.20D’时(D’为筒型基础原型直径)且竖向荷载分别超过竖向极限承载力的34.3%(33.5%)、33.8%(33.4%)和31.7%(31.9%)时,基础原型的弯矩承载力随竖向荷载的增大而降低.Owing to its convenient construction,strong applicability and excellent economy,the structure of multibucket jacket foundation has been widely applied in the field of offshore wind power.During the installation process of a multi-bucket foundation,the phenomena of bucket clearance and soil plug will appear in its buckets due to the influences such as seabed flatness,soil difference in the region and seepage inside and outside the buckets,which will further lead to different effective burial depths for the buckets and ultimately affect the bearing capacities of the foundation in its service life.In this paper,the influences of effective burial depth caused by bucket clearance and soil plug on the bearing capacities of a bucket foundation are studied by means of an indoor model test and finite element analysis.Results show that after the finite element model is modified by the model test,the difference between model test results and numerical simulation results of the foundation model’s horizontal ultimate bearing capacity is lower than 8.86%under different working conditions.The horizontal ultimate bearing capacity of the multi-bucket foundation model decreases with increases in the bucket clearance height and soil plug height.When the values of clearance height are 0.10D,0.15D and 0.20D with D being the diameter of the bucket foundation model,the horizontal ultimate bearing capacity will be reduced by 9.11%,16.72%and 23.80%respectively compared with that in the case of no bucket clearance.When the values of soil plug height are 0.10D,0.15D and 0.20D,the horizontal ultimate bearing capacity will be reduced by 9.32%,17.16%and 24.45%respectively compared with that in the case of no soil plug.When the values of bucket clearance(or soil plug)height are 0.10D',0.15D'and 0.20D'with D'being the diameter of a bucket foundation prototype,and the vertical load exceeds 34.3%,33.8%and 31.7%(or 33.5%,33.4%and 31.9%)of the vertical ultimate bearing capacity respectively,the bending moment bearing capacity of the foundation pr

关 键 词:海上风电 多筒导管架基础 筒内间隙 筒内土塞 承载力 包络面 

分 类 号:P75[天文地球—海洋科学] TM614[电气工程—电力系统及自动化] TU476[建筑科学—结构工程]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象