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An offshore substructure for a topside structure comprising a nested tubular support

机译：一种用于顶侧结构的海上子结构，包括嵌套的管状支撑

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摘要

Offshore foundations (commonly also referred to as substructures) for supporting topside structures are commonplace in the oil and gas industry for supporting, for example, a platform. The use of offshore foundations is commonplace too in other fields, such as for supporting wind turbines in offshore wind farms. One such type of foundation, as shown in Figure 1, is a monotower type foundation 1, also commonly referred to as a monotower substructure 1. The monotower substructure 1 will comprise a tube or column 2 supported by, as shown in Figure 1, a lower framework 3 or, as not shown, a jacket. Jackets are typically used where the sea depth is greater and/or where the structure to be supported by the monotower substructure is larger. As shown in Figure 1, the framework 3 comprises four legs; though frameworks with differing numbers of (e.g. three) legs are also commonly employed. For particularly shallow sea depths and/or where the topside structure is particularly small (e.g. a wind turbine), no jacket or lower framework may be provided at all. Instead, the tube or column may be piled into the seabed to act as a 'monopile' support to the topside structure.
机译：在石油和天然气工业中，用于支撑例如平台的用于支撑顶侧结构的海上基础（通常也称为子结构）是司空见惯的。在其他领域，例如用于支撑海上风电场中的风力涡轮机，海上基础的使用也很普遍。如图1所示，一种这样的基础类型是单塔型基础1，通常也称为单塔子结构1。单塔子结构1将包括一根管子或立柱2，如图1所示，该管子或柱子2由一根管子或柱子支撑。下部框架3或外套（未显示）。夹克通常用于海深较大和/或单塔下部结构要支撑的结构较大的地方。如图1所示，框架3包括四个支腿。尽管通常也使用具有不同数量（例如3个）支腿的框架。对于特别浅的海深和/或顶侧结构特别小（例如，风力涡轮机），可以根本不设置护套或下部框架。取而代之的是，可将管子或柱子堆入海床，以充当顶侧结构的“单向”支撑。

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