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为对大范围区域斜坡的稳定性进行有效、定量的评价,提出一个耦合二维力学分析模型的区域斜坡稳定性评价方法。选择宝鸡市金台区的一段黄土沟谷作为研究区,对文章提出的方法进行验证。首先,利用GIS实现斜坡单元的划分;然后,利用钻探及调查得到的地层数据形成区域的多层Grid模型;在此基础上,开发程序,完成计算剖面生成、滑面搜索、稳定性评价等工作;最后,根据各单元的稳定性系数,生成区域斜坡稳定性分区图。这种方法以二维极限平衡方法为基础,即可得到研究区域的二维安全系数分布图,又可求得最危险滑动面的位置和规模。
In order to effectively and quantitatively evaluate the stability of slopes over a large area, a method of regional slope stability evaluation coupled with two-dimensional mechanical analysis model is proposed. A section of loess valley in Jintai District of Baoji City was chosen as the research area, and the method proposed in the article was verified. Firstly, the division of slope units is implemented by using GIS. Then, the multi-layer Grid model of the region is formed by using the formation data obtained from drilling and surveying. Based on this, a program is developed to complete the work of calculating profile generation, sliding surface search and stability evaluation Finally, according to the stability coefficient of each unit, the regional slope stability zoning map is generated. Based on the two-dimensional limit equilibrium method, this method can obtain the distribution map of the two-dimensional safety factor in the study area and find out the location and scale of the most dangerous sliding surface.