摘要
目前大部分边坡稳定性分析软件的地层建模采用基于线条的建模方法,这种建模方法手算工作量大,建模繁琐且不直观。本文基于拓扑理论和多边形图的性质,提出了基于区域的二维边坡地层建模方法。在确定边坡计算域多边形后,用户可以任意绘制地层折线,程序自动进行折线求交运算并截除边坡计算域外的部分,然后运用左转搜索算法将计算域分割成一个个地层多边形区域,可以包含复杂内岛等情况,以模拟工程地质剖面中的透镜体及人工处理的区域等。本文的地层建模方法具有多边形区域自动识别功能,减少手工计算量,可以明显地提高边坡稳定性分析软件的建模效率和可视化程度。
At present, most slope stability analysis softwares adopt line-based stratum modeling method, which is quite complex and labor-intensive. Based on the topological theory and the property of polygon graph, a regionbased stratum modeling method in slope stability analysis has been developed. After determining the external boundary of the slope profile, users can draw stratum lines arbitrarily. The program automatically intersects stra- tum lines with the external boundary and those outside the later will be removed. Furthermore, by using left-turn searching method, a stratum line will automatically divide the existing regions into sub-regions, which can include complex island situation for simulating the lens of material embedded in another material. Since the proposed method has the function of automatically identifying polygonal greatly improves the efficiency of stratum modeling and visualization region, it is less labor-intensive and then of slope stability analysis softwares.
出处
《工程勘察》
CSCD
北大核心
2006年第2期7-11,18,共6页
Geotechnical Investigation & Surveying
基金
湖南省自然科学基金(2001JJY2079)
湖南省建设厅基金(200107)
湖南大学科学基金
关键词
边坡
地层建模
区域
拓扑
多边形图
slope
stratum modeling
region
topology
polygon graph
