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首先对边坡可靠度理论做了总结,以榆佳高速公路某堆积体边坡为研究对象,利用可靠度理论,对其稳定性做了计算,结果表明:在自然状态下(包括降雨条件下),堆积体的整体处于稳定状态,局部也基本处于稳定状态。堆积体前沿因饱水软化,强度降低,堆积体前部的破坏概率增大较多,较堆积体整体稳定性差,B4～B8剖面局部基本上处于临界状态。基于3水平4因素正交试验的参数敏感性分析表明:边坡的可靠度指标对冲积层饱和状态的强度参数较为敏感,冰碛物自然状态的强度参数次之,其他参数对边坡的稳定性影响较小。由于冲沟分割堆积体没有大规模快速滑动的可能,局部小方量在某些极端条件下存在运移可能,可通过削坡减载方式进行治理。
First of all, the theory of slope reliability is summarized. Taking the slope of a pile of Yujia Expressway as the research object, the reliability theory is used to calculate its stability. The results show that under the natural conditions (including rainfall conditions ), The whole body in a stable state, some are basically in a stable state. The front of deposit is softened due to saturated water and the strength is decreased, the probability of destruction in the front part of the deposit increases more, and the overall stability of the deposit is worse than that of the deposit. The sections B4 ~ B8 are basically in critical state. The sensitivity analysis based on the 3-level 4-factor orthogonal experiment shows that the reliability index of the slope is more sensitive to the intensity parameter of the saturated alluvial layer, the natural parameter of the moraine is the second, and the other parameters are stable to the slope Minor sexual effects. Due to the possibility of large-scale rapid sliding of the gully-divided pile, the local small square may be transported under some extreme conditions and can be controlled by cutting and shedding.