基于FLAC^(3D)的延吉某工程边坡稳定性研究

Research on stability of an engineering slope in Yanji based on FLAC^(3D)

边坡稳定性是边坡防治工程的关键技术问题,边坡的稳定性问题直接关系到人们的生命财产安全。本文以延吉市某建筑边坡为工程背景,通过现场调查及钻探资料、试验分析、数值模拟等手段,获取边坡岩土物理力学参数,运用FLAC^(3D)软件,采用摩尔-库伦本构模型对该边坡进行稳定性分析评价。选取两个典型剖面建立模型,模拟分析边坡仅在重力影响下的应力以及最大不平衡力变化情况。计算得出两个剖面的安全系数,分析每个剖面的X向应力云图、Z向位移云图与剪切应变增量图。通过对比得出边坡位移和应力变化趋势,确定边坡易发生失稳的区域并判断边坡是否需要治理。本文对延吉某边坡进行稳定性计算,探究其变形破坏机理,意为类似工程的稳定性分析和治理设计提供参考。

Slope stability is the key technology of slope prevention and control engineering.Slope stability is directly related to people's life and property safety.Based on the engineering background of a building slope in Yanji City,the physical and mechanical parameters of the slope are obtained by means of field investigation,drilling data,test analysis and numerical simulation.The stability of the slope is analyzed and evaluated by using FLAC^(3D) software and Moore-Coulomb constitutive model.Two typical sections are selected to establish the model.The stress and the maximum unbalanced force of the slope under the influence of gravity are simulated and analyzed.The safety coefficients of the two sections are calculated,and cloud diagram of the X-direction stress and the Zdirection displacement,and the increment diagram of shear strain of each section are analyzed.Through comparison,the trend of slope displacement and stress change is obtained,and the area where the slope is prone to instability is determined and determinate whether the slope needs to be treated.In this paper,the stability calculation of a slope in Yanji is carried out,and the deformation and failure mechanism is probed,which provides a reference to the stability analysis and treatment design of similar projects.