黏土中宽浅式筒型基础筒土协同承载模式研究

宽浅式筒型基础是一种新型的海上风电基础，该基础在控制地基差异沉降方面具有巨大优势。但目前工程应用中宽浅式筒型基础的设计方法尚不成熟，一般是将筒内土体与筒视为整体，参照实体墩式基础的设计规范进行设计验算。文中基于宽浅式筒型基础大比尺模型试验，分析筒型基础在受荷过程中所受土压力的变化规律，发现只有部分筒内土体与基础协同作用。为研究筒土协同作用，提出了筒土协同度的概念，运用基于试验参数的数值模拟方法就加荷条件、筒型基础结构尺寸、筒内分仓形式、分仓板高度和厚度及筒土相对刚度等因素对筒土协同度的影响进行系统分析，并研究筒土协同度对承载力的影响，为基础结构的优化设计提供参考。

Bucket-soil cooperative bearing capacity analysis of shallow buried bucket foundation in clay

The shallow buried bucket foundation is a new type of offshore wind turbine foundation, which has the great advantage of controlling differential settlement in clay ground. But the design method of shallow buried bucket foundation is still premature at present, and the bucket and soil inside the bucket is usually taken as a whole when designing the bucket foundation. Based on bucket-soil uncooperative phenomenon and earth pressure distribution in the large scale model test, the concept of bucket-soil cooperative degree is defined. The influences of the parameters, including loading condition, dimension of bucket foundation, bucket compartment form, height and thickness of bulkheads and bucket-soil relative stiffness, on bucket-soil cooperative degree were analyzed using numerical simulation method. The influence of bucket-soil cooperation on the bearing capacity of bucket foundation was studied in order to provide reference for optimal structural design of the foundation.