Hydraulic Fracturing in Earth-rock Fill Dams

Content: Cover
 Title Page
 Copyright
 Contents
 About the Author
 Preface
 Acknowledgments
 Nomenclature
 Chapter 1 Introduction
 1.1 Types of Embankment Dam
 1.2 Hydraulic Fracturing
 1.3 Failure of the Teton Dam
 1.4 Erosion Damage of the Balderhead Dam
 1.5 Leakage of the Hyttejuvet Dam
 1.6 Self-Healing of Core Cracks
 1.7 Technical Route for Present Study
 1.8 Summary
 References
 Chapter 2 Review of Literature
 2.1 Introduction
 2.2 Theories of Hydraulic Fracturing
 2.2.1 Theories Based on Circular Cavity Expansion Theory
 2.2.2 Theories Based on Spherical Cavity Expansion Theory. 2.2.3 Theories Based on True Triaxial Stress State Analyses2.2.4 Empirical Formulas
 2.2.5 Theories Based on Fracture Mechanics
 2.3 Laboratory Experimental Studies on Hydraulic Fracturing
 2.3.1 Cylindrical Sample
 2.3.2 Rectangular Sample
 2.4 Field Testing Studies of Hydraulic Fracturing
 2.5 Model Testing Studies of Hydraulic Fracturing
 2.6 Numerical Simulations of Hydraulic Fracturing
 2.7 Analysis Method for Hydraulic Fracturing
 2.8 Summary
 References
 Chapter 3 Conditions and Mechanisms of Hydraulic Fracturing
 3.1 Introduction
 3.2 Conditions for Hydraulic Fracturing. 3.2.1 Crack Located at the Upstream Face of Core3.2.2 Low Permeability of Core Soil
 3.2.3 Rapid Impounding
 3.2.4 Unsaturated Soil Core
 3.3 Mechanical Mechanism of Hydraulic Fracturing
 3.4 Modes of Fracture in Fracture Mechanics
 3.5 Summary
 References
 Chapter 4 Fracture Toughness and Tensile Strength of Core Soil
 4.1 Introduction
 4.2 Tested Soil
 4.3 Testing Technique on Fracture Toughness
 4.3.1 Testing Method
 4.3.2 Apparatus
 4.3.3 Testing Procedures
 4.3.4 Testing Program
 4.4 Testing Results on Fracture Toughness
 4.4.1 Suitability of Linear Elastic Fracture Mechanics. 4.4.2 Influence Factors on Fracture Toughness4.5 Testing Technique on Tensile Strength
 4.5.1 Testing Method and Apparatus
 4.5.2 Calculation of Tensile Strength
 4.5.3 Testing Procedures
 4.5.4 Testing Program
 4.6 Testing Results on Tensile Strength
 4.6.1 Water Content
 4.6.2 Dry Density
 4.6.3 Preconsolidation Pressure
 4.7 Relationship between Fracture Toughness and Tensile Strength
 4.8 Discussions
 4.8.1 Soils from References
 4.8.2 Rocks from References
 4.9 Summary
 References
 Chapter 5 Fracture Failure Criteria for Core Soil under I-II Mixed Modes
 5.1 Introduction. 5.2 Experimental Technique5.2.1 Loading Assembly
 5.2.2 Calculation Theory
 5.2.3 Testing Procedures
 5.2.4 Test Program
 5.3 Testing Results
 5.4 Fracture Failure Criteria
 5.5 Discussions
 5.5.1 Testing Technique
 5.5.2 Failure Criteria
 5.6 Summary
 References
 Chapter 6 Hydraulic Fracturing Criterion
 6.1 Introduction
 6.2 Failure Criterion
 6.2.1 Simplification of a Crack
 6.2.2 Criterion
 6.3 Cubic Specimen with a Crack
 6.3.1 Calculation of KI
 6.3.2 Calculation of KII
 6.3.3 Calculation of (KI2 + KII2)0.5
 6.3.4 Dangerous Crack Angle
 6.4 Core with a Transverse Crack.