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Drainage conditions around monopiles in sand

机译:沙子中的单一的排水条件

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Large diameter monopiles are typical foundation solutions for offshore wind turbines. In design of the monopile foundations in sand, it is necessary to understand the drainage conditions of the foundation soil under the design loading conditions as the soil performance (strength and stiffness) is highly dependent on the drainage conditions. This paper presents a numerical investigation into this issue, with a purpose to develop a simple design criterion for assessing the soil drainage conditions around a monopile in sand. It is found that for typical monopile foundations in sand, the drainage condition during a single load cycle is generally expected to be undrained. However, the current state-of-practice uses p-y springs derived for drained soil responses for monopile design. The impact of this discrepancy on monopile foundation design was evaluated and found to be insignificant due to the relatively low level of loading as compared to the capacity of the soil.
机译:大直径单一的典型风机是典型风力涡轮机的典型基础解决方案。 在砂中的纪用基础的设计中,由于土壤性能(强度和刚度)高度依赖于排水条件,有必要了解基础土壤的排水条件。 本文提出了对此问题的数值调查,目的是开发一个简单的设计标准,用于评估沙子中蒙太岛周围的土壤排水条件。 结果发现,对于砂中的典型单披露基础,在单个载荷周期期间的排水条件通常会被不推迟。 然而,目前的实践状态使用P-Y Springs导出用于挖土的土壤响应来进行单披露设计。 根据土壤容量相比,评估了这种差异对单披肩基础设计的影响,并发现载荷水平相对较低。

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