复合筒型风电基础单向流局部冲刷试验研究

发布时间：2018-04-01 15:11

本文选题：复合筒型基础　切入点：单向流　出处：《岩土力学》2015年04期

【摘要】：复合筒型基础是一种新型的宽浅式海上风电基础,相对于桩基础等深基础,复合筒型基础周围地基的冲刷破坏对风机结构体系安全性的影响更加明显,因此,研究海流作用下复合筒型基础的冲刷特性很有必要。针对某工程实例,建设了冲刷试验场地,布置了典型测点,为复合筒型基础冲刷试验奠定了基础;采用系列比尺模型的方法,分别选取1:20、1:40、1:70三种比尺的模型,对海上风电复合筒型基础样机周围粉砂质海床的冲刷情况进行了试验研究;分析了各组试验冲刷平衡时间、模型周围冲刷坑的范围、最大冲刷深度,并且依据系列比尺模型试验原理计算出了实际工程中的冲刷深度。通过试验研究给出了实际工程复合筒型基础的最大冲刷深度,明确了单向流作用下复合筒型基础周围地基局部冲刷特性,填补了复合筒型基础冲刷试验研究的空白,为复合筒型基础的工程应用提供了指导。
[Abstract]:The composite cylindrical foundation is a new wide shallow offshore wind power foundation. Compared with the pile foundation, the erosion failure of the foundation around the composite cylinder foundation has a more obvious effect on the safety of the fan structure system. It is necessary to study the scour characteristics of composite cylindrical foundation under the action of ocean current. In view of an engineering example, a scour test site is built and typical measuring points are arranged, which lays a foundation for the scour test of composite cylindrical foundation. A series of scale models were used to study the scour of silty seabed around the prototype of offshore wind power composite cylinder foundation, and the scour equilibrium time of each test group was analyzed. The range of the scour pit around the model, the maximum scour depth, and the maximum scour depth of the composite cylindrical foundation of the actual engineering are calculated according to the principle of the series scale model test. The local scour characteristics of the foundation around the composite cylindrical foundation under the action of unidirectional flow are made clear, which fills the blank in the experimental study of the composite cylindrical foundation, and provides guidance for the engineering application of the composite cylindrical foundation.
【作者单位】：中国海洋大学工程学院;天津大学水利工程仿真与安全国家重点实验室;山东高速青岛发展有限公司;
【基金】：国家国际科技合作专项资助(No.2012DFA70490) 国家创新研究群体科学基金资助项目(No.51321065) 中央高校基本科研业务费专项(No.201513002)
【分类号】：TU476

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