节理岩体变形模量估算新方法  

A NEW METHOD FOR EVALUATE OF MODULI OF JOINTED ROCK MASS

作　　者：徐光黎[1] 潘别桐[1] 晏同珍[1] 

机构地区：[1]中国地质大学水文系

出　　处：《地球科学（中国地质大学学报）》1991年第5期573-580,共8页Earth Science-Journal of China University of Geosciences

摘　　要：本文引入了一种新的分析分解模型,来探索节理岩体变形参免文?首先提出节理几何特征和引人节理张量定义,然后根据“等效应变”原理,建立节理老体应力应变本构方也导出了岩体变形模量随空间方位变化的预测方程.The deformation moduli of jointed rock mass is a very important input data in rock engineering. There are three approches to determine this parameter, i.e., in-situ test, empirical and analytical decomposition models. The first one is restricted for its expensive and time consuming. Besides, the reliability of results is still a problem due to size effect. The second one can give a mean value with a very simple and economical way. However, the precision can not be answered because of the sample number. Therefore, the third one is focused by all over the world. A new analytical decomposition model is introduced to assess moduli of jointed rock mass in this paper.Joint geometry is reviewed breifly and joint tensor is defined to describe joint geometry characteristics quantitatively. A stress-strain contructive equation of jointed rock mass is establised up based on the concept of equivalent strain,which can lead to an equation to pridict moduli with orientation. It is demonstrated that it is a quite reasonable way in the practice use.

关 键 词：节理 岩体 变形 模量 分析分解模型 

分 类 号：P542.33[天文地球—构造地质学]