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Presented by
DIBENDU ROY
Department of Civil Engineering
University Roll no: 10901320018
Year: 4th (7th semester)
Academic year: 2022-2023
coastal hydraulics and sediment transport
Topic: Fundamentals of Coastal Structures
The main and prime reason to construct coastal
protection structures is to protect harbor and other
infrastructures from sea wave effects such as erosion.
Not only are they useful for changing current and sand
movements but also to redirect rivers and streams.
What is costal protection structures
Types of Coastal Protection Structures
1. Seawalls
2. Bulkheads
3. Groins
4. Jetties
5. Breakwaters
Seawalls are commonly built and run along shoreline to prevent coastal
structures and areas from the detrimental influence of ocean wave actions
and flooding which are driven by storms.
Seawall.
a- Curved face seawall
Curved face seawall is designed to withstand high wave action
effects.the toe of the curved face seawall is built from large
stones to decrease scouring.
b- Stepped face seawall
Stepped face seawall is used to oppose or resist moderate
wave actions. Reinforced concrete sheet piles with tongue-
and- groove joints are employed to construction this type of
seawall.
Bulkheads
Bulkheads can be constructed by concrete, steel, or timber. There
two major types which are gravity structures and anchored sheet
pile walls. The bulkheads might not have exposed to substantially
strong wave actions and its main purpose is to retain earth but
scouring at the base of the structure should be considered by the
designer.
Groins
Groins are shore protection structures that decrease erosion affects
to the shoreline by changing offshore current and wave patterns.
Groins can be built by materials such as concrete, stone, steel, or
timber and are categorized depend on length, height, and permeability.
Furthermore, groins are commonly constructed vertically to the
shoreline and it can either impermeable or permeable.
Jetties
Jetties are usually built of materials such as concrete, steel, stone,
timber, and occasionally asphalt used as binder. This structure is
constructed at river estuary or harbor entrance and extended into
deeper water to oppose forming of sandbars and limit currents.
Breakwaters
There are three major types of breakwaters namely: offshore, shore-
connected, and rubble mound. Not only are they used to protect shore
area, anchorage, harbor from wave actions but also to create secure
environment for mooring, operating, and handling ships.

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Coastal structure.pdf

  • 1. Presented by DIBENDU ROY Department of Civil Engineering University Roll no: 10901320018 Year: 4th (7th semester) Academic year: 2022-2023 coastal hydraulics and sediment transport Topic: Fundamentals of Coastal Structures
  • 2. The main and prime reason to construct coastal protection structures is to protect harbor and other infrastructures from sea wave effects such as erosion. Not only are they useful for changing current and sand movements but also to redirect rivers and streams. What is costal protection structures
  • 3. Types of Coastal Protection Structures 1. Seawalls 2. Bulkheads 3. Groins 4. Jetties 5. Breakwaters
  • 4. Seawalls are commonly built and run along shoreline to prevent coastal structures and areas from the detrimental influence of ocean wave actions and flooding which are driven by storms. Seawall. a- Curved face seawall Curved face seawall is designed to withstand high wave action effects.the toe of the curved face seawall is built from large stones to decrease scouring. b- Stepped face seawall Stepped face seawall is used to oppose or resist moderate wave actions. Reinforced concrete sheet piles with tongue- and- groove joints are employed to construction this type of seawall.
  • 5. Bulkheads Bulkheads can be constructed by concrete, steel, or timber. There two major types which are gravity structures and anchored sheet pile walls. The bulkheads might not have exposed to substantially strong wave actions and its main purpose is to retain earth but scouring at the base of the structure should be considered by the designer.
  • 6. Groins Groins are shore protection structures that decrease erosion affects to the shoreline by changing offshore current and wave patterns. Groins can be built by materials such as concrete, stone, steel, or timber and are categorized depend on length, height, and permeability. Furthermore, groins are commonly constructed vertically to the shoreline and it can either impermeable or permeable.
  • 7. Jetties Jetties are usually built of materials such as concrete, steel, stone, timber, and occasionally asphalt used as binder. This structure is constructed at river estuary or harbor entrance and extended into deeper water to oppose forming of sandbars and limit currents.
  • 8. Breakwaters There are three major types of breakwaters namely: offshore, shore- connected, and rubble mound. Not only are they used to protect shore area, anchorage, harbor from wave actions but also to create secure environment for mooring, operating, and handling ships.