基于API RP 2A-WSD规范的桩基内力分析  

Internal force analysis of pile based on code of API RP 2A-WSD

作　　者：吴文聪[1] 司银云[1] 王广贤[1] WU Wen-cong;SI Yin-yun;WANG Guang-xian(CCCC-FHDI Engineering Co.,Ltd.,Guangzhou 510230,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司

出　　处：《水运工程》2019年第9期300-304,308,共6页Port & Waterway Engineering

摘　　要：针对桩土之间的复杂受力问题,采用Recommended Practice for Planning,Designing and Constructing Fixed Offshore Platforms—Working Stress Design(API RP 2A-WSD)的桩基设计方法(用P-Y曲线弹簧模拟桩侧土体法向抗力,用T-Z曲线弹簧模拟桩侧土体轴向抗力,用Q-Z曲线弹簧模拟桩端土体轴向抗力)对高桩墩台码头进行桩基内力分析,并把计算结果同弹性嵌固法的计算结果进行比较。得出如下结论:在摩擦桩中,桩身轴力随着入土深度的增加而减小;桩身弯矩有两处反弯点,其最值发生在桩头或是入土端4 d^6d处;API法计算所得的桩基最大弯矩较弹性嵌固法小。Aiming at the complex interaction between piles and soils,the pile foundation design method of Recommended Practice for Planning,Designing and Constructing Fixed Offshore Platforms-Working Stress Design(API RP 2A-WSD)is adopted to analyze the internal force of pile foundation for high-pile pier and abutment wharf,and the calculation results are compared with those of elastic embedding method.In the models,P-Y curve spring is used to simulate the normal resistance of soil at pile side,T-Z curve spring is used to simulate the axial resistance of soil at pile side and Q-Z curve spring is used to simulate the axial resistance of soil at pile end.The following conclusions are drawn:for the in friction piles,the axial force of pile body decreases with the increase of soil depth;the bending moment of pile body has two reverse bending points,and the maximum bending moment occurs at the pile head or the soil end for 4 d^6d;the maximum bending moment calculated by API method is smaller than that calculated by elastic embedding method.

关 键 词：高桩墩台 P-Y曲线 T-Z曲线 Q-Z曲线 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程]