某滑坡稳定性及治理措施研究

Research on Stability and Control Measures of A Landslide

受自然因素和人类活动导致的边坡失稳会引起一系列问题,甚至造成严重的经济损失和人员伤亡。基于此,本文以某滑坡体工程为研究对象,通过调研和现场勘察总结了滑坡空间形态特征、滑床和滑动带特征。基于极限平衡法计算了天然工况和暴雨工况下边坡稳定性安全系数,明确边坡的稳定状态。针对边坡的不稳定状态,提出了桩锚联合支护结构,通过有限元软件建立三维边坡模型,系统探讨了桩锚联合支护施工参数边坡变形稳定性的影响,明确了合理的施工参数。研究表明,剪出口在滑坡体上部分的南侧,滑面几乎贯穿整个区域;天然工况下边坡处于基本稳定状态;考虑暴雨或强降雨影响时,边坡处于不稳定状态;边坡稳定性与桩间距呈反比例关系,与锚固长度成正比例关系;桩间距为3m、锚固长度为15m既能满足边坡稳定性要求,又具有经济性。本文研究方法可为类似工程提供一定的指导。

The instability of slopes caused by natural factors and human activities can lead to a series of problems,and even cause serious economic losses and casualties.Based on this,this article takes a landslide engineering project as the research object,and summarizes the spatial morphology characteristics,sliding bed and sliding zone characteristics of the landslide through research and on-site investigation.Based on the limit equilibrium method,the safety factors of slope stability under natural conditions and rainstorm conditions are calculated,and the stability state of the slope is determined.A pile anchor combined support structure is proposed to address the unstable state of slopes.A threedimensional slope model is established using finite element software,and the influence of construction parameters of pile anchor combined support on slope deformation stability is systematically explored.Reasonable construction parameters are clarified.Research has shown that the shear outlet is located on the southern side of the landslide body,and the sliding surface almost runs through the entire area,under natural working conditions,the slope is in a basically stable state,when considering the influence of rainstorm or heavy rainfall,the slope is in an unstable state,the stability of the slope is inversely proportional to the spacing between piles and directly proportional to the anchoring length,a pile spacing of 3m and an anchoring length of 15m can meet the requirements of slope stability and are economical.