粉喷桩桩侧摩阻力强化效应作用机理有限元分析  

Analysis of strengthening effect of lateral friction about deep jetting mixing pile by finite element method

作　　者：杜海金[1] 郭永发[1] 孙洪业 施润凤[1] 

机构地区：[1]河北工程大学土木学院,河北邯郸056038 [2]北京建工集团,北京100044

出　　处：《河北建筑科技学院学报》2006年第4期15-18,共4页Journal of Hebei Institute of Architectural Science & Technology

摘　　要：根据邯郸市某工程粉喷桩单桩载荷试验资料，依据Meyerhof理论，采用有限元法分析了桩侧摩阻力强化效应与桩身强度、桩长、桩端土压缩模量及桩顶荷载的关系，结果显示：在桩端以da（4～6）B范围内，桩端土压缩模量对粉喷桩承载力的影响很大，该结论对复合地基的设计具有指导意义。The relationships between strengthening effect of lateral friction and intensity of the DJM pile body, length of pile, modulus of compressibility of the pile-tip soil and the changing load on top of the pile were analyzed based on the data of static load test of deep jetting mixing （DJM） pile at one building site in Handan City by using finite element method according to Meyerhof theory. The results show that the modulus of compressibility of the pile-tip soil has more bigger influence on strengthening effect at （4 - 6）B of the bottom of pile. The conclusions have guidance for design of DJM pile composite foundation.

关 键 词：复合地基 桩侧摩阻力 强化效应 有限元法 

分 类 号：TU473[建筑科学—结构工程]