| 李洪江,刘红军,张浩.海上风力发电伞式吸力锚基础承载规律试验分析[J].水利学报,2015,46(12):1460-1469 |
| 海上风力发电伞式吸力锚基础承载规律试验分析 |
| Experimental study on offshore USAF bearing characteristics |
| 投稿时间：2015-01-18 |
| DOI：10.13243/j.cnki.slxb.20150078 |
| 中文关键词: 海床 波浪 黄河三角洲 吸力锚 承载特性 地基变形 |
| 英文关键词: seabed waves Yellow River delta USAF bearing characteristics foundation deformation |
| 基金项目:国家自然科学基金项目(41572247,51279032);山东省科技攻关项目资助(2014GGX104007) |
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| 摘要点击次数: 1908 |
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| 中文摘要: |
| 为了考察新型海洋伞式吸力锚基础(USAF)在不同载荷环境下的工作特性,通过室内土箱试验设计了3 种加载方案:水平静力加载、水平循环加载和静力抗拔试验,在黏质粉土模拟海床中较系统的研究了海洋USAF基础的承载特性和锚土相互作用规律。水平静力加载试验中重点分析了分级加载后锚体荷载位移变化规律,绘制了荷载位移归一化曲线用来判别锚体正常工作状态下的极限水平承载力。水平循环加载下,拟合了土体塑性累积变形与循环周次的关系式,模拟了USAF 在波浪低频荷载和一次风暴潮作用后的锚体变位响应。静力抗拔试验中,发现并阐述了锚体在上拔过程中的“分段现象”,运用动力学原理建立了一种确定USAF基础最大抗拔荷载的搜索方法,并比较了锚体上拔过程中上拔加速度,主筒负压值与上拔荷载的关系,试验结果对USAF基础的工程具有指导意义。 |
| 英文摘要: |
| Abstract: In order to study the working features of USAF under different load conditions, the rules of an- chor-soil interaction and bearing characteristics under horizontal static loads,horizontal cyclic loads and ver- tical drawing loads were researched in soil box testes. The load-displacement change rule of USAF was ana- lyzed and the corresponding normalized curve used to distinguish the limit bearing capacity was drawn un- der horizontal static loads. In horizontal cyclic loading test,the fitting equation of soil cumulative plastic de- formation and the load cycles was derived and the displacement response of USAF was simulated respective- ly under low frequency loads and storm surge loads. The “segmentation phenomenon” in the process of USAF drawing test was found and explained while a search method for determining USAF ultimate uplift bearing capacity was put forward and verified. In the final, the relationship of acceleration value, negative pressure value and drawing loads value was confirmed. |
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