A complementary approach to quantify the basic GSI chart considering scale effect on rock structure  

作　　者：Harun Sonmez Gulseren Dagdelenler Yilmaz Ozcelik Murat Ercanoglu 

机构地区：[1]Applied Geology Division,Geological Engineering Department,Faculty of Engineering,Hacettepe University,Beytepe,Ankara,06800,Türkiye [2]Mining Engineering Department,Faculty of Engineering,Hacettepe University,Beytepe,Ankara,06800,Türkiye

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2025年第1期154-167,共14页岩石力学与岩土工程学报(英文)

摘　　要：Geological strength index(GSI)has been widely used as an input parameter in predicting the strength and deformation properties of rock masses.This study derived a series of equations to satisfy the original GSI lines on the basic GSI chart.Two axes ranging from 0 to 100 were employed for surface conditions of the discontinuities and the structure of rock mass,which are independent of the input parameters.The derived equations can analyze GSI values ranging from 0 to 100 within±5%error.The engineering dimensions(EDs)such as the slope height,tunnel width,and foundation width were used together with representative elementary volume(REV)in jointed rock mass to define scale factor(sf)from 0.2 to 1 in evaluating the rock mass structure including joint pattern.The transformation of GSI into a scaledependent parameter based on engineering scale addresses a crucial requirement in various engineering applications.The improvements proposed in this study were applied to a real slope which was close to the time of failure.The results of stability assessments show that the new proposals have sufficient capability to define rock mass quality considering EDs.

关 键 词：Basic GSI chart Engineering dimension(ED) Hoek and Brown failure criterion Quantification of GSI Quantitative GSI chart Scale effect 

分 类 号：TU45[建筑科学—岩土工程]