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为实现FBG对边坡的稳定性监测,需要对传感器的布设进行优化。楚雄腰站变电站二级边坡,平台宽1.5m,坡角30°,材质为回填土,其背靠变电站,易受大型设备压力作用而影响稳定性。建立实际边坡模型,利用有限元强度折减法分析计算,结果显示,最大塑性应变出现在二级边坡平台表面及其附近。所以在二级边坡平台上布设3根应变桩来实现深层监测,实际监测结果显示,各应变桩最大应变分别:420με、400με、-360με,对应位置分别出现在深度1m、2m、2m处,现场观测平台表面及其附近出现裂缝,结果均能够与仿真优化布设结论较好吻合。
In order to monitor the slope stability of FBG, the layout of the sensor needs to be optimized. Chuxiong waist station substation secondary slope, platform width 1.5m, slope angle 30 °, the material for the backfill soil, which backed by substations vulnerable to pressure effects of large equipment and affect the stability. The actual slope model is established, and the strength reduction method is used to analyze and calculate. The results show that the maximum plastic strain appears on the surface of the secondary slope platform and its vicinity. Therefore, three strata piles are laid on the secondary slope platform to realize deep monitoring. The actual monitoring results show that the maximum strain of each strained pile is respectively 420με, 400με and -360με, and the corresponding positions appear at the depths of 1m, 2m and 2m respectively, Cracks appear on the surface of the observation platform and its vicinity, and the results are in good agreement with the conclusions of the simulation and optimization layout.