涠洲11—1平台桩基结构型式研究

涠洲11-1油田位于我国南海北部湾浅水区,是一个边际油田。按照常规工程结构设计思路,涠洲11-1油田这样规模的浅水平台桩基结构,通常采用主桩结构型式。通过数值模拟计算,综合考虑平台结构用钢量、施工方案、投资费用和工程地质风险等多种因素,对平台采用裙桩结构型式和主桩结构型式两种方案进行了对比分析,最终确定涠洲11-1平台采用裙桩结构型式。实践结果表明,我国浅海地区油田平台桩基结构可以采用裙桩结构型式,不仅可以有效回避工程地质风险,而且可以降低成本。

Study on the type of pile structures for Weizhou 11-1 oilfield platform

Weizhou 11-1 oilfield,a shallow water marginal oilfield,is located in Beibu Gulf of the South China Sea.Following the conventional structural design philosophy,the pile structure of Weizhou 11-1 platform usually use the type of main pile.By means of the numerical simulation and considering many factors synthetically such as steel weight of the platform structure, the construction program,investment costs and geotechnical risk,the contrastive analysis has been made to the types of the platform structures with skirt piles and main pile,and finally it is determined to use skirt piles for Weizhou 11-1 platform.The practice indicates that the skirt pile structure can be adopted for the platforms in the shallow water area in China,which not only can effectively avoid geotechnical risk,but also can reduce costs.