FLAC3D在边坡数值分析及位移监测中应用

Application of FLAC3D in Landslide Numerical Analysis and Displacement Monitoring

摘要:

以辽宁省岫岩县某山头边坡为例，通过槽探、钻探、大型剪切试验等多种手段，找出合理潜在滑动面。利用FLAC3D软件对该边坡进行三维数值模拟，分析应力应变关系，得出变形较大及应力集中区域，同时利用强度折减法得出边坡的安全系数，评价其稳定性。将从边坡后缘张拉裂隙上布设的位移监测点采集到的数据，与数值模拟结果进行对比分析，验证数值模拟的可靠性，为边坡抗滑设计提供依据。

关键词:FLAC3D;边坡;数值模拟;位移监测

Abstract:

Take a mountain side slope in Xiuyan County of Liaoning Province as an example, the potential sliding surface is found out with trenching, drilling and large-scale shear tests. 3D numerical simulation is made on the side slope with FLAC3D software to analyze the relationship between stress and strain in order to determine the area with large deformation and stress concentration; meanwhile by using strength reduction method to draw safety factor of the landslide and evaluate its stability. Comparing the data obtained in the deformation monitoring points arranged at the tensioning fractures on the back edge of the slope with the numerical simulation results, the reliability of the numerical simulation can be verified to provide the basis for the anti-sliding design of the side slope.

Key words:FLAC3D; Landslide; Numerical Simulation;Displacement Monitoring