Introduction to rock mechanics Introduction Differentiating between soil and rock Mechanics of failure Classification of intact rock Compressive strength of weak rock Origins of shear strength in intact rock Shear strength parameters for the sample in Figure Stability of a cut slope in weak rock Discontinuities in rock masses The importance of discontinuities to stability Early lessons and the relevance of rock mechanics Application of rock mechanics History of the subject area Rock mechanics as a scientific discipline Load changes Fundamental mechanics Definitions Mohr circle representation of stress-state Stress concentration in underground openings Stresses below foundations Effective stress Rock deformation and behaviour Direct shear Simple shear and associated rock structures Surface features on rock fractures Conclusions to this section Geological processes and the nature of rock masses Introduction Earth stresses Faults Folding Rock textures, fabrics and effect on properties Rock joints and other discontinuities Major geological structures Hydrogeology of rock masses Introduction Fundamental concepts and definitions Hydraulic conductivity and permeability Measuring hydraulic conductivity Typical parameters Unconfined and confined aquifers and storage Compartmentalisation, aquicludes and aquitards Flow paths Characterisation and prediction of hydrogeological conditions for projects Grouting Hydrogeological modelling Characterising rock for engineering purposes Introduction Initial stages of site investigation Field mapping Trial excavations Discontinuity surveys Remote measurement Interpretation Rose diagrams Stereographic interpretation Roughness measurement Ground investigation techniques Description and classification of rocks Rock mass classifications Interpreting ground conditions and reporting Contracts for construction Instrumentation and monitoring Properties and parameters for design Introduction Sampling Role of index testing Basic characterisation Rock strength and its measurement Rock deformability Rock shear strength at mass scale Hydraulic conductivity and related parameters Foundations on rock Introduction Design of shallow foundations Difficult sites Deep foundations Case example: The Izmit Bay crossing: Rock engineering for the anchorage of a major suspension bridge Site formation Rock slopes engineering Design of engineering works Slope formation Quarrying Open-pit slopes Underground excavations Introduction Difference between tunnels and caverns Stability categories for underground excavations Investigation Design Construction Cavern construction Conversion factors (to two decimal places) References
Steve Hencher is research professor in engineering geology at the University of Leeds, UK, and an honorary professor in the Department of Earth Sciences at the University of Hong Kong. Up until recently, he was a director of Halcrow (China) and head of Geotechnics in the Hong Kong Office for approximately ten years. Previously, he worked with Bechtel on the design of the high-speed railway in South Korea and for the Geotechnical Control Office of the Hong Kong Government. He also spent 12 intervening years teaching an MSc course in engineering geology and conducting research at the University of Leeds.
"in my opinion, the great strength of this book, and the feature that distinguishes it from any other book that I am familiar with in the field of rock mechanics and rock engineering, is its emphasis on (these) basic geological factors and their influence, often their over-riding influence, on the design and performance of engineering projects constructed in and on rock. ... I know of no other book that explains as thoroughly or as well the centrally important relationship between the geological history and the resulting geological features of a site on the one hand, and the investigation, design, construction and performance on an engineering project on the other." -Professor Edwin T Brown AC, Senior Consultant, Golder Associates Pty Ltd, Brisbane, Australia, Emeritus Professor, University of Queensland, Brisbane, Australia, President, International Society for Rock Mechanics, 1983-87 "Steve Hencher's book has an Earth scientists approach to practical rock mechanics and his in-depth knowledge of geological structures and mechanical properties of rock material offer an excellent introduction to rock mechanics and rock engineering. ... excellent case studies from civic works, mines and underground constructions. ... written so that students with a basic knowledge in geology can follow the more mechanistic parts and apply the knowledge to rock engineering problems and field cases. -Ove Stephansson, GFZ Potsdam, Germany and SRC Berlin "... gives very good description of the rock materials and rock mass. It is very suitable for civil engineers." -Jian Zhao, Monash University