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冀西北地区是湿陷性黄土广泛分布的地区之一,受地形切割的影响,形成了众多的黄土直立边坡,对当地人民的生活及出行造成了一定的影响。本文以下马圏滑坡为例分析了黄土地区滑坡的基本特征及其变形机制,并通过瑞典条分法和传递系数法对滑坡体的稳定性进行了分析计算,结果表明黄土地区滑坡以黄土内部的圆弧滑动为主。通过采取拦挡、削坡等一系列治理措施,该滑坡体目前处于稳定状态,治理工程取得了良好的社会、经济和环境效益。本文前提是黄土下伏地层为硬质岩石的情况,当为软岩时需另作分析。
Northwest Hebei is one of the widely distributed areas of collapsible loess. Due to the influence of topographic cutting, a large number of vertical loess slopes are formed, which has a certain impact on the life and travel of local people. In this paper, the basic characteristics and deformation mechanism of landslides in the loess area are analyzed with the following example. The stability of the landslide body is analyzed and calculated by using the piecewise and transfer coefficient method in Sweden. The results show that the landslides in the Loess area are dominated by The main arc slide. By adopting a series of measures such as blocking and slope cutting, the landslide body is in a stable state at present, and the governance projects have achieved good social, economic and environmental benefits. The premise of this paper is that the loess underburden is hard rock, and when it is soft rock, it needs to be analyzed separately.