某山地变电站二级边坡稳定性分析研究

The Research on Secondary Slope Stability of Mountain Substation

瑞典条分法是对山地变电站边坡进行稳定性分析的一种有效手段,结合光纤传感技术实际监测可以进一步验证边坡的稳定性。利用瑞典条分法进行边坡稳定性验算,分析其安全系数。并布设表面式裂缝传感器监测边坡表面应变量,监测结果显示上表面IS3传感器的应变变化为近540με,下表面IS4传感器的应变变化为近120με,IS5传感器的应变变化为近120με。布设表面分布式紧套光纤,采用OTDR法监测边坡表面形变,监测结果显示光纤链路的衰减系数为12.567 d B/km,衰减曲线有良好线性,无明显台阶,判定边坡处于稳定状态。

Fellenius method is an effective means of mountain substation slope stability analysis,combining withthe actual monitoring optical fiber sensing technology to further verify the stability of the slope. Use Fellenius meth-od to check the slope stability,analyzing the factor of safety. Layout surface cracks type sensors monitor the slopesurface should be variable,the actual monitoring results show that the strain change on the surface of the sensor IS3 is nearly 540 με,the strain change under the surface of sensor IS4 is nearly 120 με,the strain change of sensor IS5 is nearly 120 με. Distributed surface laid fiber sleeve,and the use of surface deformation monitoring slope OTDRmethod,the actual monitoring results show that the attenuation coefficient of optical fiber link is 12.567 d B/km,theattenuation curve has good linearity,no significant steps determines the slope in a stable state.