scholarly journals Evaluation of Rock Mass Deformability by Elastic Exact Solution in Borehole Jack Test.

2000 ◽  
pp. 45-53
Author(s):  
Shohhei KAWAKUBO ◽  
Noriyuki YUKI
Keyword(s):  
Exact Solution ◽  
Rock Mass ◽  
Rock Mass Deformability

scholarly journals STRENGTH AND DEFORMABILITY OF SPECIFIC SEDIMENTARY AND OPHIOLITHIC ROCKS

2017 ◽  
Vol 43 (3) ◽  
pp. 1259 ◽  
Author(s):  
P. V Marinos ◽  
G. Tsiambaos
Keyword(s):  
Rock Mass ◽  
Laboratory Testing ◽  
Sedimentary Rocks ◽  
Site Investigation ◽  
Basic Component ◽  
Sufficient Data ◽  
Modulus Ratio ◽  
Characteristic Values ◽  
Rock Mass Deformability ◽  
Typical Range

The paper deals with the evaluation of strength and deformability of sedimentary rocks and ophiolites based on the processing of laboratory testing results. Characteristic values and their typical range for the parameters σci, Ei , as well as the Modulus Ratio (MR) are presented. These parameters are significant for the estimation of the strength and deformability of the rock mass since σci is basic component for the solution of Hoek-Brown failure criterion and Ei and MR are important components of the latest rock mass deformability expression (Hoek-Diedrichs, 2006). The recent site investigation and laboratory work undergone for the design of numerous tunnels in the Greek territory provided very good and sufficient data, derived from a specifically established database, for the estimation of strength and deformability of specific rocks. These rocks are sandstones and siltstones of flysch and molassic formations, as well as limestones and ophiolites.

scholarly journals SELECTION OF A FIELD TESTING METHOD FOR KARST ROCK MASS DEFORMABILITY BY MULTI CRITERIA DECISION ANALYSIS

2013 ◽  
Vol 19 (2) ◽  
pp. 196-205 ◽  
Author(s):  
Danijela Marčić ◽  
Anita Cerić ◽  
Meho Saša Kovačević
Keyword(s):  
Rock Mass ◽  
Decision Analysis ◽  
Deformation Modulus ◽  
Field Testing ◽  
Field Method ◽  
Test Methods ◽  
Ranking List ◽  
Multi Criteria Decision Analysis ◽  
Rock Mass Deformation ◽  
Rock Mass Deformability

The rock mass deformation modulus is an essential parameter for any numerical analysis and prediction of deformation in geotechnical engineering. Experience acquired using a large number of geotechnical projects in Croatia and the world indicates a somewhat unreliable determination of rock mass deformability based on correlation of classification results. The method of field testing for deformability can provide a more reliable insight into rock mass behaviour under loading conditions. The paper presents the most frequently used methods for field testing rock deformability. The benefits and disadvantages are shown of each particular method used in determining criteria and forming a ranking list of test methods using the multi criteria decision analysis. This ranking list of terrain testing for the rock mass stiffness is acquired on the basis of set criteria, assumes guidelines for compiling an exploratory works plan necessary for designing complex geotechnical structures in karst. Appropriate analyses of the sensitivity to changes in the significance of particular criteria was carried out including its effect on selecting the field method for testing karst rock mass deformability.

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