倾斜荷载下大直径长桩的承载特性研究  

Bearing Behaviors of Large-Diameter Long Pile under Inclined Loads

作　　者：王孝兵[1] 文松霖[1] 

机构地区：[1]长江科学院水利部岩土力学重点实验室,武汉430010

出　　处：《长江科学院院报》2012年第3期45-49,共5页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金资助项目(50978034)

摘　　要：基于数值分析与荷载传递相结合的方法,利用FLAC3D软件对倾斜荷载下大直径长桩的承载特性进行了研究。结果表明:荷载倾角不同,基桩承载特性不同;存在一临界角,在荷载倾角从小于临界角变化到超过临界角过程中,桩的承载特性由以竖向为主转化为以水平向为主,本研究的工况,临界角约20°。通过与前人的研究成果对比分析,发现Koumoto倾斜系数和Meyerhof包络线半经验公式都不能准确估算临界角所对应的极限承载力。Based on numerical analysis in association with load transfer method,the bearing behaviors of large-diameter long pile under inclined loads are studied by using software FLAC3D.It＇s found that the bearing behavior of pile in clay is determined by the inclination.When the inclination varies from being smaller than a critical angle to being larger than the critical angle,which is about 20° for the case in this paper,the bearing mode changes from vertical-load dominated to horizontal-load dominated.Through comparison with previous researches,it＇s found that both the inclination factor given by Koumoto and the semi-empirical envelope formula proposed by Meyerhof can＇t estimate the ultimate bearing capacity accurately.

关 键 词：大直径长桩 倾斜荷载 V-H荷载空间 破坏包络线 

分 类 号：TU473.1[建筑科学—结构工程]