摘要
由于现场条件的限制,有时只能采用单测线法来估算随机节理的真实迹长,即随机节理迹长取样偏差的纠正。为了更准确地估算随机节理的真实迹长,建议首先采用随机节理优势组数的概率统计划分方法,将测线法获得的随机节理进行优势组数划分;获取每一条随机节理的观测迹长和每一组节理的平均观测迹长;应用概率统计的方法求得每一组节理迹长的概率分布密度特征函数;最后,采用半迹长估算法来实现各组随机节理的迹长取样偏差,获得了较符合实际的成果。
Due to the limitation of field condition,single scan line method has been applied to estimate randomly distributed joint trace length on occasion,namely,sampling bias correction of random joint trace length. In order to obtain more precise joint trace length,it is proposed that (1) the method of probabilistic delineation of orientation data is used to delineate randomly distributed joint trace to obtain the predominant joint clusters,(2) each observed joint trace length and mean value of trace length are obtained for every cluster,(3) a probabilistic numerical method is used to model the probabilistic density function (PDF) of trace length for each clusters,and (4) according to the PDF of trace length for each cluster,semi-trace length scan line method is applied to correct the sampling bias of observed trace length for each cluster and to obtain the corrected mean value of trace length. The presented research results prove reasonable by actual engineering project.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第10期1755-1759,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金(40272117)
2002年高等学校博士学科点专项科研基金(20020183061)资助项目。
关键词
工程地质
测线法
随机节理
迹长
取样
engineering geology,method of scan line,random joints,traces length,assessment
