论文部分内容阅读
岩体统计均质区的划分一直是岩土工程领域研究的重要课题。大多学者采用产状或者其它单一参数划分岩体统计均质区,却很少有人考虑多参数进行划分研究。考虑了产状、间距、张开、迹长和粗糙度共5个参数,提出了一种划分裂隙岩体统计均质区的新方法,即采用权的最小平方法确定参数的权重并用相关系数法计算研究区裂隙各个参数之间的相关性,从而确定均质系数以此实现对裂隙岩体统计均质区的划分。通过工程实例即云南省马吉水电站左岸坝肩某一高程相邻4个平硐的岩体结构统计均质区划分,分析了多参数对裂隙岩体统计均质区划分的影响。研究结果表明:裂隙岩体统计均质区划分与裂隙产状、间距、张开、迹长和粗糙度等因素有关并成功划分了研究区的统计均质区,证明了该方法的可行性。
The division of rock mass statistical homogeneity zone has been an important issue in the field of geotechnical engineering. Most scholars use the output or other single parameters to divide the statistical homogenization area of rock mass, but few people consider the multi-parameter classification research. A total of five parameters such as shape, spacing, opening, trace length and roughness are considered. A new method of dividing the statistical homogenization zone of fractured rock mass is proposed, that is, the least square method of weight is used to determine the weight of parameters and the correlation coefficient Method to calculate the correlation between the various parameters of the fissure in the study area to determine the homogeneous coefficient in order to achieve the division of the statistical homogenization area of fractured rock mass. This paper analyzes the influence of multi-parameters on the division of statistical homogenization zone of fractured rock mass through engineering example that is the statistic homogenization zone of rock mass structure of four adjacent adits at an elevation on the left bank abutment of the left bank of Magee Hydropower Station in Yunnan Province. The results show that the statistical homogenization zone of fractured rock mass is related to the occurrence of fissure, spacing, openness, trace length and roughness, and the statistical homogenization zone is successfully divided, which proves the feasibility of this method.