NEW DETERMINATION AND APPLICATION OF THE ROCK MASS MECHANICAL PARAMETERS BASED ON THE GSI SYSTEM
The deformation modulus and strength of jointed hard rock masses have become important parameters in design and construction for rock engineering. The parameters of rock masses should be determined in situ by carrying out special tests. However, rockmass is heterogeneous, the deformation and failure law of which is very complex. The mechanical property of rock mass isnt be described by carrying out indoor test, but the field tests to determine this parameter directly are time consuming, expensive and the reliability of the results of these tests is sometimes questionable. Consequently, Hoek et al. have proposed empirical relationships for estimating the value of rock mass mechanical parameters on the basis of classification schemes and Geological Strength Index (GSI). In this study, the new methods to determine rock mass mechanical parameters are introduced. Especially, the quantitative GSI system has proposed by introducing easily measurable parameters with their ratings or intervals which define the blockiness and surface condition of discontinuities. Finally, the proposed new methods have been applied to practical project example and the rationality of the methods is further explained by comparing the results of field tests. The proposed method provides a new, economical and practical avenue for estimation the mechanical parameters of rock mass.
SHUQIANG LU MO XU
China Three Gorges University Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, M State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Tec
国际会议
三亚
英文
47-52
2009-05-24（万方平台首次上网日期，不代表论文的发表时间）