ISO 1990 01-4:2016包含了适用于广泛的近海结构而不是特定结构类型的地学和基础工程的那些方面的规定。这些方面包括: -场地和土壤特征； -危险识别； -由海床支撑的浅基础的设计和安装； -桩基的设计和安装； -辅助结构的土壤-结构相互作用，例如海底生产系统、立管和流线（A.10中给出的指南）； -浮式结构物固定系统用锚的设计（A。 11). 海洋土壤调查的特殊要求详见ISO 19901-8。 同样适用于近海结构和岸上结构的土力学和基础工程方面没有得到解决。ISO 19901本部分的用户应熟悉这些方面。 ISO 19901-4概述了主要用于设计埋置长度（L）与直径（D）之比为L/D<；1（第7条）和具有L/D>；第10条（第8条）。ISO 19901的本部分不适用于1<； L/D<；10、这种中间基础，通常称为“沉箱基础”，包括浅基础，裙边比海底宽度更深，比通常用于建造离岸结构的短桩、刚性桩和大直径桩。此类基础的设计可能需要特定的分析方法；重要的是，从ISO 19901本部分所述的设计方法中推断出的任何中间基础，都应谨慎处理，并由岩土专家进行评估。

ISO 19901-4:2016 contains provisions for those aspects of geoscience and foundation engineering that are applicable to a broad range of offshore structures, rather than to a particular structure type. Such aspects are: - site and soil characterization; - identification of hazards; - design and installation of shallow foundations supported by the seabed; - design and installation of pile foundations; - soil-structure interaction for auxiliary structures, e.g. subsea production systems, risers and flowlines (guidance given in A.10); - design of anchors for the stationkeeping systems of floating structures (guidance given in A.11). Particular requirements for marine soil investigations are detailed in ISO 19901？8. Aspects of soil mechanics and foundation engineering that apply equally to offshore and onshore structures are not addressed. The user of this part of ISO 19901 is expected to be familiar with such aspects. ISO 19901？4 outlines methods developed primarily for the design of shallow foundations with an embedded length (L) to diameter (D) ratio L/D < 1 (Clause 7) and relatively long and flexible pile foundations with L/D > 10 (Clause 8). This part of ISO 19901 does not apply to intermediate foundations with 1 < L/D < 10. Such intermediate foundations, often known as 'caisson foundations', comprise either shallow foundations with skirts penetrating deeper into the seabed than the width of the foundation, or shorter, more rigid and larger diameter piles than those traditionally used for founding offshore structures. The design of such foundations can require specific analysis methods; it is important that any extrapolation from the design methods described in this part of ISO 19901 to intermediate foundations be treated with care and assessed by a geotechnical specialist.