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2009年5月16日兰州市九州石峡口小区西侧山体发生滑坡灾害,造成重大生命和财产损失。本文对石峡口滑坡的特征和成因进行了系统研究,认为滑坡区高陡的地形、不合理的绿化灌溉和不良的岩土体工程地质性质是诱发该滑坡的主要因素。在分析石峡口滑坡成因的基础上对与该滑坡相邻的西侧高边坡进行了稳定性研究,采用有限元强度折减法计算出潜在滑面的位置和稳定系数,并和极限平衡法计算结果做比较,结果表明有限元强度折减法与传统极限平衡法计算的稳定性系数很接近,增强了计算结果的可靠性。
May 16, 2009 Landslide disaster occurred on the west side of Shi Xia Kou District, Lanzhou City, causing significant loss of life and property. This paper systematically studies the characteristics and causes of the landslide in Shi Xia Kou, and considers that the high and steep terrain of the landslide area, irrational greening irrigation and poor geotechnical properties are the main factors inducing the landslide. Based on the analysis of the causes of the landslide in Shi Xia Kou, the stability of the west side high slope adjacent to the landslide is studied. The potential slip surface position and stability coefficient are calculated by finite element strength reduction method. And the limit equilibrium method The results show that the stability factor calculated by the FEM reduction method and the traditional limit equilibrium method are very close, which enhances the reliability of the calculation results.