再论悬臂式抗滑桩合理桩间距的计算方法

发布时间：2018-03-11 17:41

本文选题：抗滑桩　切入点：桩间距　出处：《岩土力学》2015年01期 　论文类型：期刊论文

【摘要】：为了进一步合理确定悬臂式抗滑桩桩间距,在对以往关于开挖边坡抗滑桩桩间距分析模型缺陷讨论的基础上,提出在抗滑桩桩后局部所形成的拱脚处,两侧土拱在此交汇形成的是倒梯形受压区。在计算确定悬臂式抗滑桩桩间距时,除满足桩间静力平衡条件、土拱跨中及拱脚处的强度条件等基本控制条件外,还需满足桩计算宽度条件、桩土变形协调条件等附加条件,得到了确定桩间净距的方程组,通过迭代试算可以求解。依托一工程实例,定量地说明了在其他因素不变的情况下,桩间净距随桩后土体黏聚力或内摩擦角的增大而非线性增大,且桩间净距受黏聚力的影响更为敏感,同时桩间净距随着桩后坡体推力的增大而呈非线性减小。所提出的方法除可用于黏性土外,还可用于无黏性土。
[Abstract]:In order to further determine the spacing of cantilever anti-slide piles, on the basis of discussing the defects of the previous analysis model of anti-slide pile spacing of excavation slope, the arches formed locally after the anti-slide piles were put forward. When calculating and determining the spacing of cantilever anti-slide pile, the basic control conditions, such as static equilibrium condition between piles, strength condition in the middle of soil arch span and arch foot, are satisfied. The equations for determining the net distance between piles are obtained, which can be solved by iterative trial calculation. Based on an engineering example, it is quantitatively explained that the other factors are invariant. The net distance between piles increases nonlinearly with the increase of the cohesive force or the angle of internal friction, and the net distance between piles is more sensitive to the cohesive force. At the same time, the net distance between piles decreases nonlinearly with the increase of the thrust of the pile. The proposed method can be used not only for the clay soil, but also for the non-clay soil.
【作者单位】：西南交通大学地质工程系;西南交通大学高速铁路运营安全空间信息技术国家地方联合工程实验室;
【基金】：国家自然科学基金项目(No.51278430) 教育部新世纪优秀人才支持计划资助项目(No.NCET-13-0976)
【分类号】：TU473.1

【相似文献】