溢洪道开挖边坡三维地质建模与稳定性分析及应用  

3D GEOLOGICAL MODEL AND STABILITY ANALYSIS OF SPILLWAY EXCAVATING SLOPE AND ITS APPLICATION

作　　者：林达[1] 李明超[1] 佟大威[1] 钟登华[1] 

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《岩石力学与工程学报》2013年第S2期3878-3887,共10页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金创新研究群体科学基金项目(51021004);国家重点基础研究发展计划(973)项目(2013CB035904);天津市应用基础及前沿技术研究计划资助项目(12JCZDJC29200)

摘　　要：溢洪道的开挖边坡,与一般的自然边坡不同,属于人工开挖边坡,有着施工区内山高坡陡的特点,其边坡稳定性通常采用极限平衡法进行分析,但由于所建立的三维地质模型不够精确,剖分过程可视化的缺失以及稳定性分析计算界面的不够友好,很难做到直观性和清晰性的统一。运用NURBS技术建立研究区域的三维地质模型,并对VisualGeo三维地质软件进行二次开发,实现三维边坡体的自动剖分和数据提取,同时采用改进的三维可视化模拟分析系统VisualSlope进行稳定性计算、参数敏感性分析和支护措施研究。该方法可实现边坡稳定性的可视化分析与直观演示,开辟了基于三维地质模型的边坡稳定性与可视化分析的新途径。The spillway excavating slope is belonging to artificial excavating slope,which is different from general natural slope and has the characteristics of the high mountain and steep slope within the construction area. The spillway excavating slope stability is usually analyzed with limit equilibrium theory. However,as the established 3D geological model is not precise enough,the auto subdivision process visualization is not existing,and the computing interface of the stability analysis is not friendly enough,it is difficult to unify the vivacity and the clarity. In this paper,a 3D geological model of the studied region was built up,and the NURBS technology was used. The second development of the 3D geological software VisualGeo was carried out. It realized the auto subdivision of the 3D slope and the data extraction. While the improved 3D visual simulation and analysis system VisualSlope was used to calculate the stability,to analyze the sensitivity of the parameters and to research the support measures. This method realized the visual analysis and the directly demonstration of the slope stability,developing a new way for the slope stability based on 3D geological model and research of visualization analysis.

关 键 词：边坡工程 可视化 自动剖分 三维地质模型 

分 类 号：TV223[水利工程—水工结构工程]