岩土力学2011，Vol.32Issue(8)：2446-2452,7.
基于地质强度指标与区间理论的岩体抗剪强度确定方法
Method for determining rock mass shear strength based on interval theory and geological strength index
摘要
Abstract
The method for determining the geological strength index (GSI) with the surface condition and structure of rock mass mainly depends on their qualitative descriptions. There is much more subjectivity because the value is hard to get through the qualitative description. So, the quantitative indices are firstly used to determine GSI, such as process surface condition rate (SCR), joint condition coefficient (Jc), surface rate (SR) and quantitative block volume (Vb). SCR and Jc are used to reflect the surface condition. SR and Vb are used to reflect the structure of rock mass. In order to reflect the uncertainty of the quantitative indices, interval values are used to express them. Then the method for determining the interval values of GSI can be presented through the study of the determination of quantitative index values. Secondly, the interval combination method is presented to calculate the rock mass shear strength parameters according to the Hoek-Brown strength criterion. And the method for determining rock mass shear strength parameters based on interval theory and GSI is suggested. Finally, the method is used to determine the shear strength parameters of a hydropower station water intake tunnel in Hunan province. Compared with the existing analysis method, the results show that the method is reasonable and feasible. It provides a new approach to determine the shear strength parameters of rock mass, when the test data are less.关键词
岩体力学/抗剪强度/地质强度指标/Hoek-Brown准则/区间理论Key words
rock mass mechanics/ shear strength/ geological strength index/ Hoek-Brown criterion/ interval theory分类
建筑与水利引用本文复制引用
张永杰,曹文贵,赵明华,翟友成..基于地质强度指标与区间理论的岩体抗剪强度确定方法[J].岩土力学,2011,32(8):2446-2452,7.基金项目
西部交通科技项目(No.2009318000048) （No.2009318000048）
国家自科基金(No.50908024) （No.50908024）
湖南省研究生创新基金项目(No.CX2009B076) （No.CX2009B076）
长沙理工大学人才引进基金 （）
湖南省交通科技项目(No.200904). （No.200904）
