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我国是世界滑坡地质灾害重灾区,特别是西南山区。位于云南省的宜良县月牙变电站滑坡严重威胁滑坡后缘的月牙变电站和前缘的乐力升生物科技有限公司,对该滑坡进行稳定性分析从而为后期治理提供科学依据是十分必要。在勘查钻探等资料的基础上,对主滑向2-2′剖面进行计算,计算出在自然工况、饱水工况、地震工况下的稳定性系数分别为0.96、0.80、0.79。通过SLOPE/W软件对3种工况建模进行计算验证,分别得出3种工况的稳定性系数为1.002、0.853、0.842。两种方法对比,SLOPE/W软件分析的滑动面是圆弧状,计算出的稳定性系数更加真实可靠。总体,该滑坡在饱水状态和地震状态时处于不稳定,存在滑动失稳的可能。
China is the hardest hit by landslide geological disasters in the world, especially the southwest mountainous areas. Located in Yiliang County, Yunnan Province, crescent moon substation landslide serious threat to the landslide crescent of the Crescent Substation and the Le Le Biotechnology Co., Ltd., the stability analysis of the landslide so as to provide a scientific basis for post-treatment is necessary. On the basis of exploration drilling and other data, the main slip direction 2-2 ’section is calculated, and the stability coefficients under natural conditions, saturated conditions and earthquake conditions are calculated as 0.96, 0.80 and 0.79 respectively. The SLOPE / W software was used to validate the modeling of the three working conditions, and the stability coefficients of the three working conditions were respectively 1.002, 0.853 and 0.842. Compared with the two methods, the sliding surface analyzed by SLOPE / W software is arc-shaped, and the calculated stability coefficient is more real and reliable. In general, the landslide is unstable under the conditions of full water and earthquake, which may cause the sliding instability.