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Full Description
With activity in the engineering of offshore structures increasing around the world, Offshore Geotechnical Engineering offers a timely introduction to many of the core design and assessment skills required of those working in the sector, in accordance with the latest codes and standards.
All major aspects of the subject are covered in depth, including offshore site investigation, surveys, soil mechanics, jackups, jacket platforms, gravity platforms, pipelines, artificial islands, wind turbine support structures, and deepwater solutions. The author provides extensive practical guidance on the assessment of geohazards and site-specific soils data, and on how this is applied to the design, installation, maintenance, and eventual de-commissioning of offshore structures and their foundations.
Through the use of real examples and case studies, the reader is provided with the knowledge to:
identify the principal geotechnical issues for offshore developments
prepare for common challenges of offshore geotechnical engineering
design a programme of offshore investigations
carry out and manage design calculations
The first book to offer this information in a single place, Offshore Geotechnical Engineering is a comprehensive resource that will appeal to a broad spectrum of sectors - as a structured basic training for those entering the field, a comprehensive introductory text for students and lecturers, and a highly useful reference for those with experience.
Contents
Preface
Acknowledgements
Contents
Standards and Codes of Practice
Journals and Conferences
Notation
1. INTRODUCTION
1.1. Introduction
1.1.1. What is offshore geotechnical engineering?
1.1.2. Offshore field development stages
1.1.3. Nature of the industry
1.1.4. Preliminary and advanced methods
1.1.4.1. Field experience
1.1.4.2. Field trials
1.1.4.3. Centrifuge model testing
1.1.4.4. Single-gravity model testing
1.1.4.5. Numerical methods
1.1.5. Standards and Code of Practice
1.2. Types of offshore structure
1.2.1. Jacket platforms
1.2.2. Jackups
1.2.3. Gravity platforms
1.2.4. Subsea systems
1.2.5. Cables and pipelines
1.2.6. Anchored structures
1.2.7. Deepwater solutions
1.2.8. Green energy structures
1.2.9. Artificial islands
1.3. The offshore environment
1.3.1. Geohazards
1.3.2. Environmental loads
1.3.3. Calculating wind loads
1.3.4. Calculating wave and current loads
1.3.5. Scour
1.3.6. Seismic loading
1.3.7. Ice loading
2. OFFSHORE SURVEYS
2.1. Introduction
2.1.1. Types and objectives of offshore surveys
2.1.2. Geophysical surveys
2.1.3. Pipeline and cable route surveys
2.1.4. Geotechnical surveys
2.1.5. Types of survey report
2.2. Geotechnical survey equipment and procedures
2.2.1. Geotechnical vessels
2.2.2. Typical requirements
2.2.3. Drilling systems
2.2.4. Sampling systems
2.2.5. In-situ testing
2.3. Interpreting CPT data
2.3.1. What is an offshore CPT test?
2.3.2. Identifying soil types
2.3.3. Design parameters for siliceous sands
2.3.4. Design parameters for clays
2.4. Laboratory testing and reporting
2.4.1. Role of laboratory testing
2.4.2. Classification tests - soils
2.4.3. Classification tests - cemented materials
2.4.4. Strength tests
2.4.5. Consolidation tests
2.4.6. Specialized tests
2.5. Developing a design soil profile
2.5.1. Identifying soil layers
2.5.2. Density and mineralogy
2.5.3. Strength of siliceous sand layers
2.5.4. Strength of carbonate sand layers
2.5.5. Strength of clay layers
2.5.6. Strength of cemented layers
2.6. Reporting
2.6.1. Daily reports
2.6.2. Field report
2.6.3. Factual report
2.6.4. Engineering (interpretive) reports
3. SOIL BEHAVIOUR
3.1. Soil characterization
3.1.1. Particulate nature of soil
3.1.2. Mineralogy and particle shape
3.1.3. Measures of volume and density
3.1.4. Plasticity of fine-grained soils
3.1.5. Classification of soils
3.1.6. Classification of cemented materials
3.1.7. Permeability and drainage
3.2. Stress and strength
3.2.1. Total Stress
3.2.2. Terzaghi's Principle of Effective Stress
3.2.3. In-situ stresses
3.2.4. Drained shear strength
3.2.5. Undrained shear strength
3.2.6. Critical steady, and residual states
3.3. Elastic and plastic properties
3.3.1. Critical state soil mechanics
3.3.2. Compressibility of soils
3.3.3. Elastic equations - drained case
3.3.4. Elastic equations - undrained case
3.3.5. Measuring the elastic parameters
3.3.6. Yield envelope
3.3.7. Hardening and softening
3.3.8. Sub-yield behaviours
3.3.9. Advanced constitutive models
3.4. Cyclic loading
3.4.1. Types of cyclic loading
3.4.2. Cyclic responses of sands
3.4.3. Cyclic responses of clays
4. JACKUPS
4.1. Introduction
4.1.1. Purpose and description of jackups
4.1.2. Installation issues
4.1.3. Environmental loads
4.1.4. Operational issues
4.1.5. Removal issues
4.2. Preloading
4.2.1. Reason for preloading
4.2.2. Bearing capacity on clay
4.2.3. Bearing capacity on sand
4.2.4. Punchthrough - sand over clay
4.2.5. Other preloading issues
4.3. Foundation assessment
4.3.1. Foundation loading
4.3.2. Yield envelope
4.3.3. Moment fixity
4.3.4. Cyclic degradation
4.4. Jackup dynamics
4.4.1. Stick model
4.4.2. Equations of motion
4.4.3. Solutions
4.4.4. Advanced analyses
5. JACKET PLATFORMS
5.1. Introduction
5.1.1. Purpose and description
5.1.2. Installation issues
5.1.3. Environmental loads
5.1.4. Operational issues
5.1.5. Removal issues
5.2. Axial pile
