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The Delft Sand, Clay and Rock Cutting Model

In dredging, trenching, (deep sea) mining, drilling, tunnel boring and many other applications, sand, clay or rock has to be excavated. The book covers horizontal transport of settling slurries (Newtonian slurries). Non-settling (non-Newtonian) slurries are not covered.

Civil Engineering Engineering

Author: Sape A. Miedema
Publisher: Delft University of Technology
Source: LibreTexts
License: CC BY-NC-SA
Language: EN

Read online Download PDF (open licence)

Contents· 169 sections

01: Introduction
1.01: Approach
02: Basic Soil Mechanics
2.01: Introduction
2.02: Soil Mechanics
2.03: Soils
2.04: Soil Mechanical Parameters
2.05: Criteria and Concepts
2.06: Soil Mechanical Tests
2.07: Nomenclature
2.08: The Mohr Circle
2.09: Active Soil Failure
2.10: Passive Soil Failure
2.11: Summary
2.12: Shear Strength versus Friction
2.13: Nomenclature
03: The General Cutting Process
3.01: Cutting Mechanisms
3.02: Definitions
3.03: The Flow Shear and Crushed Type
3.04: The Curling Type
3.05: The Tear Type and Chip Type
3.06: The Snow Plough Effect
3.07: Example Program in Visual Basic 6
3.08: Finding the Shear Angle
3.09: Specific Cutting Energy Esp
3.10: Nomenclature
04: Which Cutting Mechanism for Which Kind of Soil
4.01: Cutting Dry Sand
4.02: Cutting Water Saturated Sand
4.03: Cutting Clay
4.04: Cutting Rock Atmospheric
4.05: Cutting Rock Hyperbaric
4.06: Summary
4.07: Nomenclature
05: Dry Sand Cutting
5.01: Introduction
5.02: Definitions
5.03: The Equilibrium of Forces
5.04: An Alternative Shape of the Layer Cut
5.05: The Influence of Inertial Forces
5.06: Specific Energy
5.07: Usage of the Model for Dry Sand
5.08: Experiments in Dry Sand
5.09: Nomenclature
06: Saturated Sand Cutting
6.01: Introduction
6.02: Definitions
6.03: Cutting Theory Literature
6.04: The Equilibrium of Forces
6.05: Determination of the Pore Pressures
6.06: Numerical Water Pore Pressure Calculations
6.07: The Blade Tip Problem
6.08: Analytical and Numerical Water Pore Pressure Calculations
6.09: Determination of the Shear Angle
6.10: The Coefficients a1 and a2
6.11: Determination of the Coefficients c1 c2 d1 and d2
6.12: Specific Cutting Energy
6.13: Experiments
6.14: General Conclusions
6.15: The Snow Plough Effect
6.16: Nomenclature
07: Clay Cutting
7.01: Definitions
7.02: Introduction
7.03: The Influence of Strain Rate on the Cutting Process
7.04: The Flow Type
7.05: The Tear Type
7.06: The Curling Type
7.07: Resulting Forces
7.08: Experiments in Clay
7.09: Nomenclature
08: Rock Cutting- Atmospheric Conditions
8.01: Introduction
8.02: Cutting Process and Failure Criteria
8.03: Cutting Models
8.04: The Flow Type (Based on the Merchant Model)
8.05: Determining the Angle
8.06: The Shear Type Tear Type and the Chip Type
8.07: Correction on the Tear Type and the Chip Type
8.08: Specific Energy
8.09: Resulting Forces and Mohr Circles
8.10: Example
8.11: Nomenclature
09: Rock Cutting- Hyperbaric Conditions
9.01: Introduction
9.02: The Flow Type and the Crushed Type
9.03: The Tear Type and the Chip Type
9.04: The Curling Type
9.05: Experiments of Zijsling (1987)
9.06: Specific Energy
9.07: Example
9.08: Specific Energy Graphs
9.09: Nomenclature
10: The Occurrence of a Wedge
10.01: Introduction
10.02: TheForceEquilibrium
10.03: The Equilibrium of Moments
10.04: Nomenclature
11: A Wedge in Dry Sand Cutting
11.01: Introduction
11.02: The Force Equilibrium
11.03: The Equilibrium of Moments
11.04: Results of some Calculations
11.05: Experiments of Hatamura and Chijiiwa (1977B)
11.06: Nomenclature
12: A Wedge in Saturated Sand Cutting
12.01: Introduction
12.02: The Equilibrium of Forces
12.03: Pore Pressures
12.04: The Equilibrium of Moments
12.05: The Non-Cavitating Wedge
12.06: The Cavitating Wedge
12.07: Limits
12.08: Experiments
12.09: The Dynamic Wedge
12.10: Nomenclature
13: A Wedge in Clay Cutting
13.01: Introduction
13.02: The Equilibrium of Forces
13.03: The Equilibrium of Moments
13.04: Nomenclature
14: A Wedge in Atmospheric Rock Cutting
14.01: Introduction
14.02: The Equilibrium of Forces
14.03: The Equilibrium of Moments
14.04: Nomenclature
15: A Wedge in Hyperbaric Rock Cutting
15.01: Introduction
15.02: The Equilibrium of Forces
15.03: The Equilibrium of Moments
15.04: Nomenclature
16: Exercises
16.01: Introduction
16.02: Chapter2- Basic Soil Mechanics
16.03: Chapter 3- The General Cutting Process
16.04: Chapter 4- Which Cutting Mechanism for Which Kind of Soil
16.05: Chapter 5- Dry Sand Cutting
16.06: Chapter 6- Water Saturated Sand Cutting
16.07: Chapter 7- Clay Cutting
16.08: Chapter 8- Atmospheric Rock Cutting
16.09: Chapter 9- Hyperbaric Rock Cutting
17: Appendices
17.01: Appendix A- Active and Passive Soil Failure Coefficients
17.02: Appendix B- Dry Sand Cutting Coefficients
17.03: Appendix C- Dimensionless Pore Pressures p1m and p2m
17.04: Appendix D- The Shear Angle Non-Cavitating
17.05: Appendix E- The Coefficient c1
17.06: Appendix F- The Coefficient c2
17.07: Appendix G- The Coefficient a1
17.08: Appendix H- The Shear Angle Cavitating
17.09: Appendix I- The Coefficient d1
17.10: Appendix J- The Coefficient d2
17.11: Appendix K- The Properties of the 200 m Sand
17.12: Appendix L- The Properties of the 105 m Sand
17.13: Appendix M- Experiments in Water Saturated Sand
17.14: Appendix N- The Snow Plough Effect
17.15: Appendix O- Specific Energy in Sand
17.16: Appendix P- Occurrence of a Wedge Non-Cavitating
17.17: Appendix Q- Occurrence of a Wedge Cavitating
17.18: Appendix R- Pore Pressures with Wedge
17.19: Appendix S- FEM Calculations with Wedge
17.20: Appendix T- Force Triangles
17.21: Appendix U- Specific Energy in Clay
17.22: Appendix V- Clay Cutting Charts
17.23: Appendix W- Rock Cutting Charts
17.24: Appendix X- Hyperbaric Rock Cutting Charts
17.25: Appendix Y- Applications and Equipment
17.26: Appendix Z- Publications