节理产状极点分形维计算方法的程序实现  

Program Implementation of Fractal Dimension Algorithm of Orientation Pole Distribution for Joints

作　　者：宋丽娟[1] 许模[1] 卢书强[2] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [2]三峡大学三峡库区地质灾害教育部重点实验室,湖北宜昌443002

出　　处：《南水北调与水利科技》2014年第4期151-155,共5页South-to-North Water Transfers and Water Science & Technology

基　　金：地质灾害防治与地质环境保护国家重点实验室开放基金(SKLGP2012K032)

摘　　要：针对节理产状极点分布分形维D计算方法中的赤道圆网格剖分法,进行了程序设计。设计过程中利用节理产状极点的极坐标与产状倾向、倾角间的转化关系,合理地将节理产状极点图数值化,使用Visual Basic for Applications(VBA)进行编程,并在Excel中直接进行数据处理,简化编程,使该程序简单易用,有利于节理产状极点分形维D计算方法的推广和应用。最后,以大岗山水电站坝区左岸6组优势裂隙资料为例,计算建基岩体开挖前后各组节理产状极点分布的分形维D,与已有文献所提节理产状极点分形维D的相关结论进行对比,验证了程序的正确性与可用性。The distribution characteristics of joints with dominant orientation are difficult to determine because of the randomness and nonuniformity of spatial distribution of joints,and fractal dimension Dis an important approach to describe quantitatively the orientation distribution using the boundary combination based on the judgment of instable block with stereographic projection.According to the mesh generation method of equatorial circle in fractal dimension D,the corresponding program was designed in this paper.In the design process,dip direction and dip angle were converted to polar coordinates and to realize the numerical representation of orientation pole distribution for joints.The program was designed with Visual Basic for Applications（VBA）and the data were processed directly in Excel,which made the program easy to operate and was beneficial to promote the application in the fractal dimension algorithm of orientation pole distribution for joints.Finally,based on the data of six sets of dominant joints collecting from the left dam foundation in the Dagangshan Hydropower Station,the fractal dimension Dof six sets of dominant joints of the foundation rock was calculated before and after the excavation,which was verified with the conclusions on the fractal dimension Dof orientation pole distribution for joints in previous studies,indicating the correctness and feasibility of the program.

关 键 词：赤平投影 不稳定块体 极坐标 分形维D 

分 类 号：TU45[建筑科学—岩土工程]