三峡大学学报（自然科学版）2011，Vol.33Issue(1)：46-50,5.
碎石桩加固土质边坡的机理及稳定性评价
Mechanism and Stability Evaluation of Earth Slope Reinforced with Stone Columns
摘要
Abstract
The engineering geological conditions of Zhenxiong slope with plenty of weak interlayer in Yunnan province, are complicated. The foundation soils are almost in saturation, with low shear strength. Because of the above engineering factors, in order to improve the status of force, deformation and stability of the slope,the scheme of roller-compacted rockfill, locally supplemented with stone columns replacement, is adopted when designing. With the software of FLAC3D, the reinforcement process of stone columns and the filling process with roller-compacted rockfill of Zhenxiong slope is analyzed with three-dimensional numerical simulation. And the mechanism of earth slope reinforced with stone columns has been analyzed. The interaction between complex foundation and stone columns and retaining walls, and the drainage after being reinforced with stone columns are taken into account. The loads are added in batches to simulate the slope reinforcement process. The effects of engineering reinforcement measures are analyzed quantitatively by comparison of stress and displacement of the slope. The slope stability is evaluated with NDM based on strength reduction method. The results show that stone columns and drainage have increased the soil mechanical properties and have reduced the pore water pressure. With the greatly improved force of the slope and the controlled deformation,the stability of the slope has been greatly improved.关键词
边坡稳定/FLAC3D/碎石桩/加固机理/强度折减法/结点位移法(NDM)分类
建筑与水利引用本文复制引用
杨石扣,任旭华,张继勋..碎石桩加固土质边坡的机理及稳定性评价[J].三峡大学学报（自然科学版）,2011,33(1):46-50,5.基金项目
江苏省普通高校研究生科研创新计划(CX10B_215Z) （CX10B_215Z）
中央高校基本科研业务费专项资金资助(2009B07714) （2009B07714）
