倾斜偏心荷载下基桩内力位移分析  

Analysis of Single Pile under Eccentric and Inclined Loading

作　　者：李微哲[1] 赵明华[1] 单远铭[1] 杨明辉[1] 

机构地区：[1]湖南大学岩土工程研究所,湖南长沙410082

出　　处：《中南公路工程》2005年第3期53-57,共5页Central South Highway Engineering

基　　金：国家自然科学基金资助项目(50378036)

摘　　要：针对工程中地基土性质变化的具体情况,假定地基系数满足(mz+C)的线性增长规律,考虑P—Δ效应并计入桩身自重、桩侧摩阻力和桩体微倾的影响,采用矩阵计算方法,分别得到单层土中倾斜偏心荷载作用、桩段顶端倾斜偏心荷载作用以及桩身水平分布荷载共同作用下的单桩计算分析的幂级数解答。结合某具体实例,对上述方法进行了验证,结果表明,该解答与实际吻合较好,具有一定的应用价值,并得出结论:桩体倾斜对桩基受力性能有显著影响。Power progression solutions for single pile were derived for three loading cases, that is, on slightly inclined pile in single layer, on top of slightly inclined pile, and horizontally on pile. In the deriva tion, it was assumed that the foundation coefficient satisfied （ mz ＋ C）, and the P-Δ effect and effects such as gravity of pile, pile soil friction and slight inclination of pile were all taken into account. An example shows that that the calculated results were in good agreement with measured data, and that the inclination of pile had an significant effect on the loading bearing capacity.

关 键 词：桩基础 桩身微倾 倾斜偏心荷载 幂级数解答 P-Δ效应 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]