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Ocean & Coastal Engineering Faculty<br />

<strong>Breakwater</strong>


1. Introduction<br />

Content<br />

2. Types of breakwaters<br />

3. Caisson breakwater (vertical wall BW)<br />

4. Revetment breakwater (rubble-mound BW)<br />

5. Summaries


• Definitions:<br />

Introduction<br />

<strong>Breakwater</strong> is a structure that protects the area in its lee<br />

from wave attack.<br />

• Purpose of breakwaters:<br />

+ To provide shelter from the waves<br />

+ Through this shelter, to manipulate the littoral transport<br />

conditions and thereby to trap some sand


Types of breakwaters<br />

- Detached breakwater (<strong>Breakwater</strong>s be completely isolated from the shore )<br />

+ Headland breakwaters<br />

+ Nearshore <strong>Breakwater</strong>s<br />

- Attached breakwater (<strong>Breakwater</strong>s can be connected to the shoreline)<br />

- Low crested structure<br />

- High crested structure<br />

- Using mass (Caissons)<br />

- Emerged breakwaters<br />

- Submerged breakwaters<br />

- Floating breakwater<br />

- Rubble mound structure<br />

- Composite structure<br />

- Using a revetment slope (e.g. with rock or concrete armour units )


Types of breakwaters


Shoreline <strong>Breakwater</strong>,<br />

Elmer, UK<br />

<strong>Breakwater</strong> in Presque Isle,<br />

Pennsylvania (1994)


Low crested structure in Denmark<br />

Low crested structure in UK<br />

Low crested during storm surge,<br />

IJmuiden, NL


Types of breakwaters<br />

- Detached breakwater (<strong>Breakwater</strong>s be completely isolated from the shore )<br />

+ Headland breakwaters<br />

+ Nearshore <strong>Breakwater</strong>s<br />

- Attached breakwater (<strong>Breakwater</strong>s can be connected to the shoreline)<br />

- Low crested structure<br />

- High crested structure<br />

- Using mass (Caissons)<br />

- Emerged breakwaters<br />

- Submerged breakwaters<br />

- Floating breakwater<br />

- Rubble mound structure<br />

- Composite structure<br />

- Using a revetment slope (e.g. with rock or concrete armour units )


• Definition<br />

Caisson breakwater<br />

• Applicable conditions (cases???)<br />

• Loads (wave loads)<br />

• Cross section design<br />

• Stabilities


Rubble-mound breakwater<br />

• Definition<br />

• Applicable conditions (cases???)<br />

• Loads (wave loads)<br />

• Cross section design<br />

• Stabilities (slope, toe)

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