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依据实际工程边坡案例,研究利用施工监测资料联合边坡稳定分析三维数值模拟确定临危边坡锚固方案的方法。研究表明,根据连续的监测资料可确定边坡内部剪切位移带的位置、发生区间和开始时间,据此可推测边坡潜在滑移面的位置和形状;边坡稳定分析有限元法三维模拟可以考虑坡体断面形态变化对坡体稳定和变形的影响,计算结果更具有合理性;以三维数值计算得到的坡体外部变形拟合实测变形和滑动面,依据临危边坡所处的极限平衡条件,可以确定坡体当前状态的等效力学参数;根据等效力学参数,通过三维模拟可以确定坡体最终形态下的潜在滑动面形状和位置,从而合理地确定加固锚索的长度和密度;工程运行情况表明,由此确定的加固方案是可靠的。
Based on the actual engineering slope case study, this paper studies the method of determining the anchoring scheme of the dangerous slope by using the three-dimensional numerical simulation of construction monitoring data and slope stability analysis. The results show that the position, the interval and the start time of the shear band inside the slope can be determined based on the continuous monitoring data, and the position and shape of the potential slip surface can be inferred. The three-dimensional simulation of slope stability analysis The influence of the slope profile morphological changes on the stability and deformation of the slope can be considered and the calculation results are more reasonable. The measured deformation and sliding surface fitted by the external deformation of the slope calculated by three-dimensional numerical calculation, according to the limit equilibrium According to the equivalent mechanical parameters, the shape and position of the potential sliding surface in the final shape of the slope can be determined by three-dimensional simulation so that the length and density of the reinforcing anchor can be reasonably determined. The operation of the project shows that the reinforcement scheme thus determined is reliable.