《基于数字高程模型数据的坡面稳定性三维分析方法》-毕业论文.doc

基于数字高程模型数据的坡面稳定性三维分析方法 摘要:针对大范围区域内坡面稳定性分析的应用需求和目前边坡稳定性计算方法的缺陷，提出了一种基于数字高程模型（dem）数据的三维分析方法。该方法采用球面代替椭球面进行滑面的搜索，并通过对二维分析结果的积分运算来计算三维条件下的边坡安全系数，最后根据安全系数确定可能的滑坡位置和形状。实际的应用结果表明，该方法简化了滑体搜索算法，能够保证边坡稳定性分析的精度，并提高了分析计算的效率。 关键词:数字高程模型;坡面;三维分析;稳定性;滑面  three.dimensional slope stability analysis based on dem data  zhang shao.hua1,3，ji wei.yong2，fan dong.juan3*，cui jian.jun2 1. institute of surveying and mapping, information engineering university, zhengzhou henan 450052, china; 2. college of geology engineering and geomatics, chang’an university, xi’an shaanxi 710054, china; 3. mimuro, unit 73608 of pla, nanjing jiangsu 210028, china abstract: aim at the application requirements of slope stability analysis in large areas and the defects of current calculation method, a three-dimensional analysis method based on digital elevation model (dem) data is proposed.in this method, a sphere is used to instead of ellipsoid to search slippery surface,and the slope safety factor under the three-dimensional conditions is calculated through integral operator with the results of two-dimensional analysis, finally, the position and shape of possible landslide is determined according to the safety factor. the practical application results confirm that this method simplifies the search algorithm, ensures the accuracy of slope stability analysis,and improves the efficiency of analysis and calculation. concerning the application requirements of slope stability analysis in large areas and the defects of current calculation method, a three.dimensional analysis method based on digital elevation model (dem) data was proposed. in this method, a sphere was used, instead of ellipsoid, to search slippery surface, and the slope safety factor under the three.dimensional conditions was calculated through integral operator with the results of two.dimensional analysis. finally, the position and shape of possible landslide were determined according to the safety factor. the practical application res