(Ebook) The mechanics of scour in the marine environment 1st Edition by B Mutlu Sumer ISBN 9789810249304

(Ebook) The mechanics of scour in the marine environment 1st Edition by B Mutlu Sumer ISBN 9789810249304

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ISBN 13: 9789810249304
Author: B Mutlu Sumer

This book treats the subject of local scour around different kinds of marine structures, exposed to waves and/or currents. The first, major part of the book is devoted to marine pipelines, describing in detail all kinds of scour scenarios, and also making recommendations for scour protection. Other kinds of structures considered are single piles (slender or large), groups of piles, complex subsea structures, breakwaters, and seawalls. The scour due to ship propellers is also described. The book deals mainly with the scour in noncohesive sediment but, whenever possible, available literature on the scour in finer sediment has been incorporated. In addition, a chapter on the impact of wave-induced liquefaction is included.The authors' aim is to describe in detail the hydrodynamic processes causing the erosion. With a hydrodynamic understanding, it is easier for the consulting engineer to predict scour in those many cases where physical model tests are not available.

(Ebook) The mechanics of scour in the marine environment 1st Table of contents:

1 Introduction and basic concepts
1.1 Introduction
1.2 Amplification factor
1.3 Equilibrium scour depth and time scale of scour
1.4 Clear-water scour and live-bed scour
1.5 Local and global scour
1.6 References
2 Scour below pipelines
2.1 Onset of scour
2.1.1 Mechanism of onset of scour. Seepage flow and piping underneath the pipe
2.1.2 Criterion for the onset of scour
2.2 Tunnel erosion
2.3 Two-dimensional scour
2.3.1 Lee-wake erosion
2.3.2 Scour depth
2.3.3 Width of scour hole
2.3.4 Time scale
2.3.5 Change in wave climate
2.4 Three-dimensional scour
2.4.1 Scour backfilling and self-burial in the free-span areas
2.4.2 Scour backfilling and self-burial at span shoulders
2.4.3 Stimulated self-burial of pipelines
2.5 Scale effects
2.6 Scour protection for pipelines
2.7 Mathematical modelling
2.7.1 Potential-flow models
2.7.2 Advanced models
2.7.3 Integrated models
2.8 References
3 Scour around a single slender pile
3.1 Flow around a slender pile
3.1.1 Horseshoe vortex in steady currents
3.1.2 Horseshoe vortex in waves
3.1.3 Lee-wake vortex flow
3.1.4 Contraction of streamlines
3.2 Scour around a slender pile
3.2.1 Scour around a slender pile in steady currents
3.2.2 Scour around a slender pile in waves
3.2.3 Scour around a cone-shaped object
3.3 Time scale
3.4 Scour protection
3.5 Mathematical modelling
3.6 References
4 Scour around a group of slender piles
4.1 Pile group in steady currents
4.1.1 Two-pile group
4.1.2 Three-pile group
4.2 Pile group of in waves
4.2.1 Two-pile group
4.2.2 Three-pile group
4.2.3 Four-pile group
4.2.4 Effect of the KC number
4.3 Global and local scour at pile groups
4.4 References
5 Examples of more complex configurations
5.1 Scour at pile-supported offshore structures
5.2 Scour characteristics
5.3 References
6 Scour around large piles
6.1 Large pile. Diffraction regime
6.2 Phase-resolved flow around the pile
6.3 Steady streaming around the pile
6.4 Scour around the pile
6.4.1 Mechanism of streaming-induced scour
6.4.2 Influence of KC and D/L
6.4.3 Influence of combined waves and current and crosssectional shape
6.4.4 Scour around a cone-shaped object
6.5 References
7 Scour around breakwaters
7.1 Scour at the trunk section of a breakwater
7.1.1 Scour at the trunk section of a vertical-wall breakwater
7.1.2 Scour at the trunk section of a rubble-mound breakwater
7.1.3 Scour protection at the trunk section of a breakwater
7.1.4 Mathematical modelling of scour at the trunk section of a breakwater
7.2 Scour around the head of a breakwater
7.2.1 Scour around the head of a vertical-wall breakwater
7.2.2 Scour around the head of a rubble-mound breakwater
7.2.3 Scour protection at the head section
7.2.4 Influence of finite length of breakwater
7.3 Scour at jetties
7.4 References
8 Scour at seawalls
8.1 Scour by normally incident breaking waves
8.2 Scour by normally incident nonbreaking waves
8.3 Scour induced by wave overtopping
8.4 Scour protection
8.5 References
9 Ship-propeller scour
9.1 Scour due to unconfined propeller wash
9.2 Scour due to confined propeller wash
9.3 Scour protection
9.4 References
10 Impact of liquefaction
10.1 Physics of liquefaction
10.1.1 Liquefaction induced by the buildup of pore pressure Residual liquefaction
10.1.2 Liquefaction induced by the upward-directed pressure gradient. Momentary liquefaction
10.2 Biot equations and their solutions
10.2.1 Biot equations
10.2.2 Stresses in soil under a progressive wave
10.3 Residual liquefaction
10.3.1 Peacock and Seed's (1968) experiment
10.3.2 Equation governing the buildup of pore pressure
10.3.3 Solution to the equation of buildup of pore pressure
10.4 Momentary liquefaction
10.4.1 General description
10.4.2 The case of completely saturated soil
10.4.3 The case of unsaturated soil
10.5 Sinking/floatation of pipelines
10.5.1 The case of residual liquefaction
10.5.2 The case of momentary liquefaction
10.6 Sinking of armour blocks in liquefied soil
10.6.1 The case of residual liquefaction
10.6.2 The case of momentary liquefaction
10.7 Appendix I. Relationships among soil properties
10.8 Appendix II. Ranges of soil properties
10.9 Appendix III. Hsu & Jeng coefficients

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