砂性土碳酸盐含量对桩基承载力的影响  

Effect of carbonate content in sandy soil on bearing capacity of pile foundation

作　　者：吴院生 刘宁 蔡伟[2] 袁永强 WU Yuan-sheng;LIU Ning;CAI Wei;YUAN Yong-qiang(China Harbor Engineering Co.,Ltd.,Beijing 100027,China;CCCC Water Transportation Consultants Co.,Ltd.,Beijing 100007,China)

机构地区：[1]中国港湾工程有限责任公司,北京100027 [2]中交水运规划设计院有限公司,北京100007

出　　处：《水运工程》2021年第11期198-202,217,共6页Port & Waterway Engineering

摘　　要：含碳酸盐砂性土有孔隙多、颗粒形状不规则、易胶结、易破碎等特点,其成因、结构机理及工程力学性质与一般石英砂有较大差异,碳酸盐含量对桩基承载力的影响尤为显著。总结了碳酸盐含量对桩基承载力的影响机理,介绍国际公认的美国石油行业学会(API)桩基设计规范及英国帝国理工大学(ICP)推荐的计算方法,并通过沙特某人工岛项目工程实例计算碳酸盐含量对桩基承载力的影响大小。The sand with carbonate content is characterized by porosity,irregular particle shape,easy cementation,easy breakage and so on while its origin,structural mechanism and engineering mechanical properties are quite different from ordinary quartz sand,especially the carbonate content has a significant impact on the bearing capacity of pile foundation.In this paper,the influence mechanism of carbonate content on the bearing capacity of pile foundation is summarized,and the calculate method recommended by API which is the internationally recognized pile design code and Imperial College(ICP)are introduced.Finally,the influence of carbonate content on the bearing capacity of pile foundation is calculated through an engineering example of an artificial island project in Saudi Arabia.

关 键 词：砂性土 碳酸盐含量 桩基承载力 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程] TU473[交通运输工程—船舶与海洋工程]