中南大学学报（自然科学版）Issue(10)：3774-3781,8.DOI:10.11817/j.issn.1672-7207.2015.10.030
微型桩组合结构加固边坡稳定性耦合分析
Coupled stability analysis for slope reinforced by micropile composite structure
摘要
Abstract
Micropile composite structures were typically composed of micropiles and cap beams. They were common reinforcements used for slope stabilizing in emergency condition in recent years. Based on numerical analysis method, the coupled analysis was conducted on the stability of micropile composite structures reinforced slope. By comparing the failure modes of non-reinforced slope and micropile composite structures reinforced slope, the influence of pile location, pile length, pile connections and soil type was analyzed. The results show that the position of the micropile composite structures plays a dominating role in the slope failure modes. For a homogeneous slope, a larger safety factor is obtained when the micropile composite structures are placed in the middle-upper part of slopes, and the optimum ratio of anchorage length and free length is about 2.0. For different soil materials, stability of slopes with micropile composite structures is improved, but the level of its improved safety factor is different, reinforcement of silty and clayey slope with micropile composite structures is the best, but sandy slope with micropile composite structures is poor. Rigid pile caps connecting micropiles can obviously improve the safety factor of a reinforced slope, and the parallel micropile frame performs better than staggered arrangement. The results of this research can provide a useful basis for the design and stability analysis of slopes reinforced by micropile composite structures.关键词
微型桩组合结构/边坡稳定性/破坏模式/耦合分析Key words
micropile composite structures/slope stability/failure mode/coupling analysis分类
建筑与水利引用本文复制引用
孙书伟,陈冲,王卫,朱本珍..微型桩组合结构加固边坡稳定性耦合分析[J].中南大学学报（自然科学版）,2015,(10):3774-3781,8.基金项目
国家自然科学基金资助项目(51574245,41002090)(Projects (51574245,41002090) supported by the National Natural Science Foundation of China) （51574245,41002090）
