| 斜坡地基刚性桩水平承载力上限分析 |
| |
| 引用本文： | 赵明华,彭文哲,杨超炜,肖尧,刘亚楠.斜坡地基刚性桩水平承载力上限分析[J].岩土力学,2020,41(3):727-735. |
| |
| 作者姓名： | 赵明华 彭文哲 杨超炜 肖尧 刘亚楠 |
| |
| 作者单位： | 湖南大学 岩土工程研究所，湖南 长沙 410082 |
| |
| 基金项目： | 国家自然科学基金项目（No.51478178） |
| |
| 摘 要： | 为探讨斜坡地基刚性桩水平极限承载力的计算方法,介绍柔性桩的等效刚性桩有效嵌入深度并引入极限水平地基反力分布形式。根据荷载指向坡外及坡内两种情况,提出适用于斜坡地基桩前土体的两种极限破坏模式。然后,基于极限分析上限定理,推导出两种荷载方向下的刚性桩极限承载力,并引入多组现场试验,验证了理论方法的合理性。探讨了边坡坡角、内摩擦角、黏聚力及荷载方向对极限承载力的影响,得出了一些规律性结论,并基于以上分析结果,提出斜坡地基刚性桩水平极限承载力随坡角变化的拟合公式。这些分析为斜坡地基上基桩设计提供了一定的参考,具有理论及工程应用价值。
|
| 关 键 词： | 桥梁工程 极限承载力 极限分析 水平受荷刚性桩 斜坡地基 破坏模式 |
| 收稿时间： | 2019-03-26 |
| 修稿时间： | 2019-05-27 |
Upper bound analysis of lateral bearing capacity of
rigid piles in sloping ground |
| |
| ZHAO Ming-hua,PENG Wen-zhe,YANG Chao-wei,XIAO Yao,LIU Ya-nan.Upper bound analysis of lateral bearing capacity of
rigid piles in sloping ground[J].Rock and Soil Mechanics,2020,41(3):727-735. |
| |
| Authors: | ZHAO Ming-hua PENG Wen-zhe YANG Chao-wei XIAO Yao LIU Ya-nan |
| |
| Institution: | Institute of Geotechnical Engineering, Hunan University, Changsha, Hunan 410082, China |
| |
| Abstract: | This paper investigated the lateral ultimate bearing capacity of rigid pile in sloping ground. Firstly, the effective embedment depth of equivalent rigid piles of flexible piles and the mechanical characteristic of laterally loaded rigid piles are introduced. Secondly, two failure modes for the soil in front of laterally loaded piles are proposed under different directional loads at the top of piles (pointing toward and away from slope). Then, the ultimate bearing capacies of the rigid pile under different directional loads are derived on the basis of the upper limit theorem of limit-equilibrium analysis, and the rationality of the proposed method is verified by field tests. Finally, effects of the slope, internal friction angle, cohesion and load direction on the ultimate bearing capacity are investigated and some general conclusions are drawn. At the meantime, a fitting formula for the lateral ultimate bearing capacity of the rigid pile in sloping ground that considering the slope angle is proposed on the basis of the analysis results. References and guidance for design of piles in sloping ground are provided, which are valuable in both theoretical and engineering applications. |
| |
| Keywords: | bridge engineering ultimate bearing capacity limit-equilibrium analysis laterally loaded rigid pile sloping ground failure mode |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
