包括低碳能源在内的石油和天然气工业 海上结构的具体要求 第4部分：岩土设计考虑因素

[中文适用范围]： 适用于离岸地质工程研究和离岸地基技术设计 [外文原描述]： This document contains provisions for geotechnical engineering design that are applicable to a broad range of offshore structures, rather than to a particular structure type. This document outlines methods developed for the design of shallow foundations with an embedded length ( L ) to diameter ( D ) ratio L / D < 0,5, intermediate foundations, which typically have 0,5 ≤ L / D ≤ 10 (see Clause 7 ), and long and flexible pile foundations with L / D > 10 (see Clauses 8 and 9 ). This document also provides guidance on soil-structure interaction aspects for flowlines, risers and conductors (see Clause 10 ) and anchors for floating facilities (see Clause 11 ). This document contains brief guidance on site and soil characterization, and identification of hazards (see Clause 6 ). This document can be applied for foundation design for offshore structures used in the lower carbon energy industry.