基于拟合优度指标评价的岩土参数概率分布研究  

Research on Probability Distribution of Parameters of Rock and Soil Based on Fitting Optimization Index

作　　者：舒继森[1] 郭兵兵[1] 张俊阳[1] 张再容[1] 

机构地区：[1]中国矿业大学矿业工程学院,煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《采矿与安全工程学报》2008年第2期197-201,共5页Journal of Mining & Safety Engineering

基　　金：国家“十一五”科技支撑计划项目(2006BAB16B00)

摘　　要：岩土参数的概率分布对可靠度计算结果有重要的影响.对岩土参数概率分布的确定,目前多用的是拟合检验的方法,常用的检验方法是χ2检验法和K-S检验法.但这两种方法在检验的过程中,由于样本数量有限,会造成接受多个假设分布的情况.本文在χ2检验和K-S检验的基础上,利用经验函数与假设理论分布函数的偏差,定义一个新的拟合优度指标R.利用该指标,能够迅速准确地确定岩土参数最优的概率分布,有良好检验效果,且指标的数学意义清楚,理解简单方便.The probability distribution of parameters of rock and soil has a significant effect on the reliability of calculation. Presently, in determining the probability distribution of parameters, the X^2 test and the K-S test are often used. However, these methods have some disadvantages accepting several assumed distributions because of a limited number of samples. Therefore, a new index was defined to describe the fitting optimization by using the deviation between the experience function and the hypothesis theory function. This new index has a clear concept and is easy to understand.

关 键 词：岩土参数 分布检验 X^2检验法 K—S检验法 有限比较法 拟合优度指标 

分 类 号：TU521.4[建筑科学—建筑技术科学]