基于FLAC^(3D)的边坡加固稳定性对比分析

CoMParative analysis of slope stability before and after reinforcement based on FLAC^(3D)

基于FLAC^(3D)软件对平朔矿联井工业广场北帮边坡进行了稳定性分析,计算边坡安全系数为1.09,小于规范要求值,结合现场调查可以判断为边坡处于不稳定状态,本身安全储备不足。研究采用预应力锚索加固边坡,采用不平衡系数法求解边坡滑坡推力,确定锚索设计轴力、锚索根数和型号、锚固段长度计算、锚索倾角和布置。研究发现:加固后边坡安全系数为1.46,超出规范要求值1.2;从剪应变增量云图中可以发现,边坡中部台阶拐角处发现破坏区,可以对锚索加固位置进行优化处理。

Based on the FLAC^3D software,the stability of the north slope of Miners Union Well Industrial Square in Pingshuo was analyzed. The safety factor of the slope is 1.09, which was less than the standard requirement. Combining with the field survey results, it is inferred that the slope is in an unstable state and lack in safety margin. In this study, the prestressed anchor cable was used to reinforce the slope, the imbalance coefficient method was used to calculate the thrust of the slope landslide, and the axial force, the number and type of the anchorage cable, the length of the anchorage section, the inclination and arrangement of the anchor cable were determined. It is found that the slope safety factor is 1.46, which is beyond the standard value by 1.2. This proves the effectiveness of the reinforcement. It can he found from the shear strain increment map that the damaged area is at the corner of the middle slope, and the anchor reinforcement position can be optimized.