Engineering rock mass classification : tunnelling, foundations, and landslides / Bhawani Singh, R.K. Goel.

Format:

Book

Author/Creator:

Singh, Bhawani.

Contributor:

Goel, R. K., 1960-

Language:

English

Subjects (All):

Engineering geology.

Tunneling.

Foundations.

Landslides--Prevention.

Landslides.

Rocks--Classification.

Rocks.

Rock mechanics.

Physical Description:

1 online resource (382 p.)

Edition:

1st ed.

Place of Publication:

Burlington, Mass. : Butterworth-Heinemann, 2011.

Language Note:

English

Summary:

Rock mass classification methods are commonly used at the preliminary design stages of a construction project when there is very little information. It forms the bases for design and estimation of the required amount and type of rock support and groundwater control measures. Encompassing nearly all aspects of rock mass classifications in detail, Civil Engineering Rock Mass Classification: Tunnelling, Foundations and Landsides provides construction engineers and managers with extensive practical knowledge which is time-tested in the projects in Himalaya and other parts of the world in comple

Contents:

Front Cover

Engineering Rock Mass Classification: Tunneling, Foundations, and Landslides

Copyright

Dedication

Contents

Preface

Acknowledgments

Chapter 1: Philosophy of Engineering Classifications

The classification

Philosophy of classification system

Need for engineering geological map

Management of uncertainties

Present-day practice

Scope of the book

References

Chapter 2: Shear Zone Treatment in Tunnels and Foundations

Shear zone

Treatment for tunnels

Treatment for dam foundations

Chapter 3: Rock Material

Rock material

Homogeneity and inhomogeneity

Classification of rock material

Class I and II brittle rocks

Uniaxial compression

Stability in water

Classification on the basis of slake durability index

Chapter 4: Rock Quality Designation

Rock quality designation

Direct method

Indirect methods

Weighted joint density

Red-flag effect of low RQD

Application of RQD

Chapter 5: Terzaghi's Rock Load Theory

Introduction

Rock classes

Rock load factor

Modified Terzaghi's theory for tunnels and caverns

Chapter 6: Rock Mass Rating

Collection of field data

Estimation of RMR

Applications of RMR

Precautions

Rock mass excavability index for TBM

Tunnel alignment

Chapter 7: Tunneling Hazards

Tunneling Conditions

Empirical approach for predicting ground conditions

Theoretical/analytical approach

Effect of thickness of weak band on squeezing ground condition

Sudden flooding of tunnels

Chimney formation

Environmental hazards due to toxic or explosive gases and geothermal gradient

Concluding remarks

Chapter 8: Rock Mass Quality Q-System

The Q-system

Joint orientation and the Q-system.

Updating the Q-system

Classification of the rock mass

Estimation of support pressure

Estimation of deformation or closure

Unsupported span

Design of supports

New austrian tunneling method

Norwegian method of tunneling

Rock mass characterization

Drainage measures

Experiences in poor rock conditions

Chapter 9: Rock Mass Number

Interrelation between Q and RMR

Prediction of ground conditions

Prediction of support pressure

Effect of tunnel size on support pressure

Correlations for estimating tunnel closure

Effect of tunnel depth on support pressure and closure in tunnels

Approach for obtaining ground reaction curve

Coefficient of volumetric expansion of failed rock mass

Chapter 10: Rock Mass Index

Selection of parameters used in RMi

Calibration of RMi from known rock mass strength data

Scale effect

Examples (palmstrom, 1995)

Applications of RMi

Benefits of using RMi

Limitations of RMi

Chapter 11: Rate of Tunneling

Classification of ground/job conditions for rate of tunneling

Classification of management conditions for rate of tunneling

Combined effect of ground and management conditions on rate of tunneling

Tunnel management (Singh, 1993)

Poor tender specifications

Contracting practice

Quality management by international tunneling association

Chapter 12: Support System in Caverns

Support pressure

Wall support in caverns

Roof support in caverns

Stress distribution in caverns

Opening of discontinuities in roof due to tensile stress

Rock reinforcement near intersections

Radial displacements

Chapter 13: Strength Enhancement of Rock Mass in Tunnels.

Causes of strength enhancement

Effect of intermediate principal stress on tangential stress at failure in tunnels

Uniaxial compressive strength of rock mass

Reason for strength enhancement in tunnels and a new failure theory

Critical strain of rock mass

Criterion for squeezing ground condition

Rock burst in brittle rocks

Tensile strength across discontinuous joints

Dynamic strength of rock mass

Residual strength parameters

Chapter 14: Rock Mass Quality for Open Tunnel Boring Machines

Q and QTBM

Penetration and advance rates

Cutter wear

Penetration and advance rates versus QTBM

Estimating time for completion

Risk management

Chapter 15: Strength of Discontinuities

Joint wall roughness coefficient

Joint wall compressive strength

Joint matching coefficient

Residual angle of friction

Shear strength of joints

Dynamic shear strength of rough rock joints

Theory of shear strength at very high confining stress

Normal and shear stiffnesses of rock joints

Chapter 16: Shear Strength of Rock Masses in Slopes

Mohr-coulomb strength parameters

Non-linear failure envelopes for rock masses

Strength of rock masses in slopes

Back analysis of distressed slopes

Chapter 17: Types of Failures of Rock and Soil Slopes

Planar (translational) failure

3D Wedge failure

Circular (rotational) failure

Toppling failure (topples)

Raveling slopes (falls)

Effect of slope height and groundwater conditions on safe slope angle

A basic landslide classification system

Causative classification

Comprehensive classification system of landslides

Landslide in over-consolidated clays

Rock slope failures

Landslide dams

Chapter 18: Slope Mass Rating.

The slope mass rating

Slope stability classes

Support measures

Modified SMR approach

Case study of stability analysis using modified SMR approach

Portal and cut slopes

Chapter 19: Landslide Hazard Zonation

Landslide hazard zonation maps-the methodology

A case history (gupta and anbalagan, 1995)

Proposition for tea gardens

Geographic information system

Mega-regional landslide zonation

Chapter 20: Allowable Bearing Pressure for Shallow Foundations

A classification for net safe bearing pressure

Allowable bearing pressure

Coefficient of elastic uniform compression for machine foundations

Scour depth around bridge piers

Rock parameters to select type of dam

Chapter 21: Method of Excavation

Excavation techniques

Assessing the rippability

Rock mass classification according to ease of ripping

Empirical methods in blasting

Chapter 22: Rock Drillability

Drillability and affecting parameters

Classification for drilling condition

Other approaches

Chapter 23: Permeability and Groutability

Permeability

Permeability of various rock types

Permeability for classifying rock masses

Permeability versus grouting

Determination of permeability

Grouting

Chapter 24: Gouge Material

Gouge

Shear strength of filled discontinuities (silty to clayey gouge)

Dynamic strength

Chapter 25: Engineering Properties of Hard Rock Masses

Hard rock masses

Modulus of deformation

UCS

Uniaxial tensile strength

Strength criterion

Support pressure in non-squeezing/non-rock burst conditions (H &lt

350 Q1/3)

Half-tunnels

Chapter 26: Geological Strength Index

Geological strength index

Generalized strength criterion.

Mohr-coulomb strength parameters

Rock parameters for intact schistose

Estimation of residual strength of rock masses

Classification of squeezing ground condition

Chapter 27: Evaluation of Critical Rock Parameters

Critical parameters

Parameter intensity and dominance

Classification of rock mass

Example for studying parameter dominance in underground excavation for a coal mine with a flat roof

Relative importance of rock parameters in major projects

Interaction between rock parameters

Application in entropy management

Chapter 28: In Situ Stresses

The need for in situ stress measurement

Classification of geological conditions and stress regimes

Variation of in situ stresses with depth

Effects of in situ stress on rock mass properties

Core Discing

Appendix I

Appendix II

Index.

Notes:

Description based upon print version of record.

Includes bibliographical references and index.

ISBN:

1-283-15265-7

9786613152657

0-12-385879-8

OCLC:

741491886