1st Edition

Rock Reinforcement and Rock Support

By Ömer Aydan Copyright 2018
    500 Pages
    by CRC Press

    500 Pages
    by CRC Press

    The stability of underground and surface geotechnical structures during and after excavation is of great concern as any kind of instability may result in damage to the environment as well as time-consuming high cost repair work. The forms of instability, their mechanisms and the conditions associated with them must be understood so that correct stabilisation of the structure through rock reinforcement and/or rock support can be undertaken.

    Rock Reinforcement and Rock Support elucidates the reinforcement functions of rock bolts/rock anchors and support systems consisting of shotcrete, steel ribs and concrete liners and evaluates their reinforcement and supporting effects both qualitatively and quantitatively. It draws on the research activities and practices carried out by the author for more than three decades and has culminated in a most extensive up-to-date and a complete treatise on rock reinforcement and rock support.

    1 Introduction

    2 Mechanism of failure in rock engineering structures and its influencing factors
    2.1 Rock, discontinuities, and rock mass
    2.2 Modes of instability about underground openings
    2.3 Modes of instability of slopes
    2.4 Modes of instability of foundations

    3 Design philosophy of rock support and rock reinforcement
    3.1 Introduction
    3.2 Empirical design methods
    3.3 Analytical approach
    3.4 Numerical methods
    3.5 Methods for stabilization against local instabilities
    3.6 Integrated and unified method of design
    3.7 Considerations on the philosophy of support and reinforcement design of rock slopes
    3.8 Considerations on philosophy of support design of pylons
    3.9 Considerations on the philosophy of foundation design of dams and bridges

    4 Rockbolts (rockanchors)
    4.1 Introduction
    4.2 Rockbolt/rockanchor materials and their mechanical behaviors
    4.3 Characteristics and material behavior of bonding annulus
    4.4 Axial and shear reinforcement effects of bolts in continuum
    4.5 Axial and shear reinforcement effects of bolts in medium with discontinuities
    4.6 Estimation of the cyclic yield strength of interfaces for pull-out capacity
    4.7 Estimation of the yield strength of interfaces in boreholes
    4.8 Pull-out capacity
    4.9 Simulation of pull-out tests
    4.10 Mesh bolting

    5 Support members
    5.1 Introduction
    5.2 Shotcrete
    5.3 Concrete liners
    5.4 Steel liners and steel ribs/sets

    6 Finite element modeling of reinforcement/support system
    6.1 Introduction
    6.2 Modeling reinforcement systems: rockbolts
    6.3 Finite element modeling of shotcrete
    6.4 Finite element modeling of steel ribs/sets or shields
    6.5 Finite element analysis of support and reinforcement systems
    6.6 Discrete finite element method (DFEM-BOLT) for the analysis of support and reinforcement systems

    7 Applications to underground structures
    7.1 Introduction
    7.2 Analytical approach
    7.3 Numerical analyses on the reinforcement and support effects in continuum
    7.4 Mesh bolting in compressed air energy storage schemes
    7.5 Reinforcement effects of rockbolts in discontinuum
    7.6 Support of subsea tunnels
    7.7 Reinforcement and support of shafts
    7.8 Special form of rock support: backfilling of abandoned room and pillar mines

    8 Reinforcement and support of rock slopes
    8.1 Introduction
    8.2 Reinforcement against planar sliding
    8.3 Reinforcement against flexural toppling failure
    8.4 Reinforcement against columnar toppling failure
    8.5 Reinforcement against combined sliding and shearing
    8.6 Physical model tests on the stabilization effect of rockbolts and shotcrete on discontinuous rock slopes using tilting frame apparatus
    8.7 Stabilization of slope against buckling failure

    9 Foundations
    9.1 Introduction
    9.2 Foundations under tension
    9.3 Foundations under compressions

    10 Dynamics of rock reinforcement and rock support
    10.1 Introduction
    10.2 Dynamic response of point-anchored rockbolt model under impulsive load
    10.3 Dynamic response of yielding rockbolts under impulsive load
    10.4 Turbine induced vibrations in an underground powerhouse
    10.5 Dynamic behavior of rockbolts and rockanchors subjected to shaking
    10.6 Planar sliding of rock slope models
    10.7 A theoretical approach for evaluating axial forces in rockanchors subjected to shaking and its applications to model tests
    10.8 Application of the theoretical approach to rockanchors of an underground powerhouse subjected to turbine-induced shaking
    10.9 Model tests on fully grouted rockbolts restraining a potentially unstable rock block against sliding
    10.10 Excavations
    10.11 Dynamic response of rockbolts and steel ribs during blasting

    11 Corrosion, degradation, and nondestructive testing
    11.1 Introduction
    11.2 Corrosion and its assessment
    11.3 Effect of degradation of support system
    11.4 Nondestructive testing for soundness evaluation
    11.5 Conclusions

    12 Conclusions


    Ömer Aydan was born in 1955, and studied Mining Engineering at the Technical University of Istanbul, Turkey (B.Sc., 1979), Rock Mechanics and Excavation Engineering at the University of Newcastle upon Tyne, UK (M.Sc., 1982), and received his Ph.D. in Geotechnical Engineering from Nagoya University, Japan in 1989.
    Prof. Aydan worked at Nagoya University as a research associate (1987-1991), and then at the Department of Marine Civil Engineering at Tokai University, first as Assistant Professor (1991-1993), then as Associate Professor (1993-2001), and finally as Professor (2001-2010). He then became Professor of the Institute of Oceanic Research and Development at Tokai University, and is currently Professor at the University of Ryukyus, Department of Civil Engineering & Architecture, Nishihara, Okinawa, Japan.

    Ömer has played an active role on numerous ISRM, JSCE, JGS, SRI and Rock Mech. National Group of Japan committees, and has organized several national and international symposia and conferences.

    "This book offers a wide variety of scholarly and applied approaches that can be used for stabilizing excavations in rock masses underground and surface. The author connects the theory with practice through numerous examples involving numerical modeling, laboratory testing, and in situ experimentations. These examples are mostly based on the author's wide-ranging experience worldwide on the subject. Rich in photographs and illustrations, the book offers educational and practical outcomes that can be used by the educators. The book gives an extensive coverage of the mechanisms involved during the rock mass - support interaction process, which are demonstrated through a wide variety of case histories. Also incorporated in the book are the examples from the rock reinforcement practices presented through detailed sketches and photographs. Researchers and practitioners can benefit from the book too as a valuable supplement to their work through a wide variety of numerical and in situ modeling exercises."

    Ugur Ozbay, Professor at the Department of Mining Engineering at the Colorado School of Mines. Reviewed Feb 2018.