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OUTLINE

OUTLINE. Engineering Properties of Rock Formations. 1- Rock Material and Rock Mass Concept 2- Rock Material Properties 3- Rock Mass Properties 4- Investigation Methods of their Engineering Properties. INTACT ROCK & ROCK MASS. ROCK DISCONTINUITIES. Definition.

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OUTLINE

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  1. OUTLINE EngineeringProperties of RockFormations 1- RockMaterialandRockMassConcept 2- RockMaterialProperties 3- RockMassProperties 4- InvestigationMethods of theirEngineeringProperties

  2. INTACT ROCK & ROCK MASS

  3. ROCK DISCONTINUITIES Definition A discontinuity in geotechnicalengineeringis a plane or surface that marks a change in physical or chemical characteristics in a soil or rock mass. A discontinuity can be, for example, abedding, schistosity, foliation, joint, cleavage, fracture, fissure, crackorfaultplane. Discontinuities may occur multiple times with broadly the same mechanical characteristics in a discontinuity set, or may be a single discontinuity. A discontinuity makes a soil or rock mass anisotropic

  4. ROCK DISCONTINUITIES Properties

  5. ROCK DISCONTINUITIES Properties • ROUGHNESS in largescale • wavyorstraight • ROUGHNESS in smallscale • roughorsmooth • INFILL material • mineral infillorclayinfillor no infill • PERSISTENCE • 1-3 metersor >10 meters • APERTURE • closedor nocontact • SPACING • 1-5 cmor >1 meters • WEATHERING conditions • freshorcompletelyweathered

  6. SHEAR STREGTH OF ROCK DISCONTINUITIES EngineeringProperties of RockFormations t = c + s tan f

  7. INVESTIGATIONS EngineeringProperties of RockFormations DRILLING (Subsurface Investigations)

  8. INVESTIGATIONS EngineeringProperties of RockFormations DRILLING RODS

  9. INVESTIGATIONS EngineeringProperties of RockFormations BOREHOLE LOGS AND SAMPLE BOXES

  10. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations RQD (RockQualityDesignation) AND CORE RECOVERY CONCEPTS

  11. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations RQD (RockQualityDesignation) AND CORE RECOVERY CONCEPTS

  12. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations RMR ROCK MASS RATING AND ROCK MASS ENGINEERING PROPERTIES

  13. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations RMR ROCK MASS RATING AND ROCK MASS ENGINEERING PROPERTIES

  14. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations Where RQD is Rock Quality Designation, Jn is joint set number, Jris joint roughness number, Ja is joint alteration number, Jw is joint water reduction factor, and SRF is stress reduction factor. It should be noted that RQD/Jn is a measure of block size, Jr/Ja is a measure of joint frictional strength, and Jw/SRF is a measure of joint stress Q-SYSTEM AND ROCK MASS ENGINEERING PROPERTIES

  15. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations GSI-SYSTEM AND ROCK MASS ENGINEERING PROPERTIES t = c + s tan f

  16. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations GSI ?

  17. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations GSI ?

  18. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations GSI ?

  19. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations GSI ?

  20. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations GSI ?

  21. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations GSI ?

  22. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations GSI ?

  23. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations GSI ?

  24. ROCK MASS CLASSIFICATIONS EngineeringProperties of RockFormations RQD ?

  25. EARTH MAKING SUBSTANCES ROCKS • ROCK SLOPE STABILITY/ INSLOPE&OUTSLOPE

  26. EARTH MAKING SUBSTANCES ROCKS • ROCK SLOPE STABILITY

  27. EARTH MAKING SUBSTANCES SOILS • GRAIN SIZE • Thesmallerthegrain size or • Thelowerthecompactiondegreeresults in; • * morepores, • * morewater in pores, • * moresettlement, • * lessbearingcapacity, • Cohesiongovernsforsmallsizes of particleswhereasFrictionanglegovernsforlargeparticles t = c + s tan f

  28. EARTH MAKING SUBSTANCES SOILS • SOIL BEHAVIOUR/SETTLEMENT

  29. EARTH MAKING SUBSTANCES SOILS • SOIL BEHAVIOUR/BEARING CAPACITY

  30. EARTH MAKING SUBSTANCES SOILS • SOIL BEHAVIOUR/LIQUEFACTION t = c + s tan f • LOOSE SOIL DENSIFY DURING LIQUEFACTION…

  31. EARTH MAKING SUBSTANCES SOILS • SOIL BEHAVIOUR/LIQUEFACTION • SOIL BEHAVES LIKE LIQUID AND HAVE LITTLE OR NO SHEAR STRENGTH AT ALL…

  32. EARTH MAKING SUBSTANCES SOILS • SOIL BEHAVIOUR/LIQUEFACTION

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