山区坡顶建筑荷载作用下顺层粘土边坡稳定性分析

基于摩尔库伦本构模型和SRM法,利用MIDAS GTS NX有限元数值模拟软件,结合镇雄县某滑坡治理区域新出现隐患应急抢险工程施工方案,将该边坡在天然状态、砌石挡土墙加固、抗滑桩加固、抗滑桩+锚杆锚索框格梁加固4种工况模拟结果与现场实际情况进行对比,分析边坡及坡顶建筑稳定性。得出以下结论:该边坡砌石挡土墙的加固作用低于天然削坡状态;坡顶建筑为一层时,天然削坡的安全系数为1.069,存在安全隐患,在类似边坡修筑浅基础房屋前应对边坡进行加固处理;抗滑桩加固对坡脚滑动体起到了良好限制作用,此时边坡安全系数为1.184,仍存在安全隐患;锚杆锚索框格梁对边坡加固时,坡顶建筑与抗滑桩最大变形分别为4.92 cm与3.26 cm,相比抗滑桩加固缩小41.4%与30.2%,安全系数为1.622,相对抗滑提高40.0%,此时边坡处于安全状态。为类似边坡治理工程提供参考。

Stability analysis of bedding clay slope under the load of building on top of mountain slope

Based on the Moore Coulomb constitutive model and SRM method,using MIDAS GTS NX finite element numerical simulation software,combined with the construction plan of a new hidden danger emergency rescue project in a landslide treatment area in Zhenxiong county,the simulation results of the slope in a natural state,the stone retaining wall reinforcement,anti-slide pile reinforcement,anti-slide pile&anchor anchor cable frame beam reinforcement are compared with the actual situation on site,and the stability of the slope and the roof of the house is analyzed.The following conclusions are drawn,the strengthening effect of the stone-masonry retaining wall on the slope is lower than that of the natural slope-cutting state;when the slope top building is one-story,the safety factor of the natural slope-cutting is 1.069,there are safety hazards,so the slope should be reinforced before the foundation house;the anti-slide pile reinforcement has a good restriction on the sliding body of the slope toe,and at this time,the slope safety factor is 1.184,and there are still hidden safety hazards;when the anchor rod anchor cable frame beam strengthens the slope,the maximum deformation of the building on the slope and the anti-slide pile are 4.92 cm and 3.26 cm respectively,41.4%and 30.2%smaller than that of the anti-slide pile reinforcement,the safety factor is 1.622,40.0%,higher than the anti-slide pile reinforcement,and the slope is in a safe state.It can provide reference for similar slope treatment projects.