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兰州资源环境职业技术学院向北侧黄土山坡发展,形成四级台阶状不稳定斜坡,威胁学院近8000人的生命及财产安全。在充分调查研究斜坡及周围地质环境条件的基础上,分析斜坡特征及变形迹象,采用土质斜坡转动平衡分析程序(REAME)进行滑面搜索,求得具有最小安全系数的最危险圆柱形破坏面,并计算不同工况下的稳定系数。计算显示,斜坡在自然状态下处于基本稳定或稳定的状态,但在降雨和地震的条件下稳定系数低于安全值,处于不稳定或欠稳定的状态,需要进行必要的工程防治。结合斜坡特征建议采用锚杆格构工程进行治理。
Lanzhou Resources and Environment Vocational and Technical College to the north side of loess hillside development, the formation of four step-shaped unstable slopes, threatening the lives of nearly 8000 people and property safety. On the basis of fully investigating the geologic and environmental conditions of slopes and surrounding areas, the slope characteristics and signs of deformation are analyzed and the slip surface is searched by REAME. The most dangerous cylindrical failure surface with minimum safety factor is obtained, And calculate the stability factor under different conditions. The calculation shows that the slope is basically stable or stable under natural conditions. However, under the condition of rainfall and earthquake, the stability coefficient is lower than the safe value, and is in an unstable or under-stable state, and the necessary engineering prevention and control is required. Combined with slope characteristics, it is recommended to treat with bolt lattice engineering.