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Rock Foundations

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Rock Foundations

File : pdf, 876 KB, 120 pages


Chapter 1


Chapter 2

Design Considerations

Design Approach

Types of Structures

Design Considerations

Factor of Safety

Chapter 3

Site Investigations

Applicable Manuals

Section I

Preliminary Studies

Map Studies

Other Sources of Information

Field Reconnaissance

Section II

Field Investigations

Geologic Mapping

Geophysical Explorations


Exploratory Excavations


Section III

Laboratory Testing

Selection of Samples and Tests

Laboratory Tests

Chapter 4

Rock Mass Characterization

Intact Rock versus Rock Mass

Section I

Geologic Descriptions

Rock Core Descriptors

Supplemental Descriptors

Index Tests

Section II

Rock Mass Classification

Section III

Shear Strength

Rock Failure Characteristics

Failure Criteria

Shear Strength Tests

Shear Strength Testing Program

Section IV

Deformation and Settlement

Moduli Definitions

Test Methods for Estimating Modulus

Other Methods for Estimating Modulu

Considerations in Selecting Design

Modulus Values

Selection of Design Moduli

Section V

Use of Selected Design Parameters

Chapter 5

Deformation and Settlement

Section I

Categories of Rock Mass Deformation

Time-Dependent Deformations

Time-Independent Deformations

Section II

Analytical Methods

Closed Form Methods

Numerical Models

Section III

Allowable Settlement

Mass Concrete Structure


Treatment Methods

Rock Mass Improvement

Foundation Design Modifications .

Chapter 6

Bearing Capacity

Section I

Failure Modes

Intact Rock Mass

Jointed Rock Mass

Layered Rock Mass

Highly Fractured Rock Masses

Secondary Causes of Failure

Section II

Methods for Computing Bearing Capacity

Analytical Methods

Bearing Capacity Equations

Eccentric Load on a Horizontal Foundation

Section III

Allowable Bearing Capacity Value

Structural Limitations

Section IV

Treatment Methods

Effective Unit Weight

Foundation Depth

Chapter 7

Sliding Stability

Section I

Modes of Failure

Potential Failure Paths

Section II

Methods of Analysis

General Approach

Conditions for Stability


Analytical Techniques for Multi-Wedge Systems

Seismic Sliding Stability

Factor of Safety

Section III

Treatment Methods

Increase in Shear Strength

Increase in Passive Wedge


Lateral Restraint

Chapter 8

Cut Slope Stability

Section I

Modes of Failure

Additional Factors Influencing Slope


Section II

Methods for Assessing Stability

Sliding Stability Analyses

Toppling Stability Analyses

Localized Sloughing Analyses

Physical Modeling Techniques

Section III

Treatment Methods and Planning Considerations

Chapter 9

Anchorage Systems


Modes of Anchor-Rock Interaction

Tensioned Anchor Systems

Untensioned Anchor Systems


Methods of Analysis

Analyses for Tension Anchor Systems




Section I

Program Initiation

Cost Control

Types and Number of Instruments

Section II

Cut Slope Instrumentation



Section III

Types of Instruments and Limitations


Ground Motions/Vibrations


Section IV

Data Interpretation and Evaluation

Reading Frequency

Automatic Data Acquisition Systems

Chapter 11

Construction Considerations

Section I


Information Requirements

Excavation Methods

Effects of Discontinuitieson



Dewatering and GroundWater Control

Dewatering Methods

Section III

Ground Control

Stability Through Excavation


Selection of Stabilization Measures

Stabilization Methods

Section IV

Protection of Sensitive

Foundation Materials

Common Materials Requiring Protection

Determination of Protection Requirements

Foundation Protection Methods

Section V

Excavation Mapping and Monitoring

Construction Monitoring

Chapter 12


Karst,Pseudokarst,and Mines

Cavitiesin Rock


Alternative Solutions

Section II

Swelling and Squeezing Rock


Cation Hydration

Chemical-Reaction Swelling

Loss of Internal Strength

Frost Action

Section III

Soil-Rock Contacts

Weathering Profiles

Design Considerations in Weathering

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