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Marine Construction SCM 330 Tyler Mason Pratt. Overview Cofferdams Barges Dredgers Conclusion Today’s Agenda Overview Cofferdams Barges Dredgers Conclusion.

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Presentation on theme: "Marine Construction SCM 330 Tyler Mason Pratt. Overview Cofferdams Barges Dredgers Conclusion Today’s Agenda Overview Cofferdams Barges Dredgers Conclusion."— Presentation transcript:

1 Marine Construction SCM 330 Tyler Mason Pratt

2 Overview Cofferdams Barges Dredgers Conclusion Today’s Agenda Overview Cofferdams Barges Dredgers Conclusion Marine Construction Tyler Mason Pratt

3 Marine Construction Tyler Mason Pratt Overview of Marine Construction Overview Cofferdams Barges Dredgers Conclusion Marine construction is a unique specialization in the construction industry that is forced to utilize means and methods unlike any other in the field of development. Building on a body of water (or even near a body of water) completely restructures how a project is approached. A successful marine project requires rare tools and practices. Cofferdams, Barges, and Dredgers are tools that have completely reshaped the Marine Construction industry.

4 Marine Construction Tyler Mason Pratt Cofferdams Overview Cofferdams Barges Dredgers Conclusion What is a Cofferdam? A watertight enclosure from which the water is pumped to expose the bottom of a river, lake, ocean, etc. and permit work to be done there. Is a retaining structure, usually temporary in nature, which is used to support the sides of deep excavations or work areas in the water.

5 Marine Construction Tyler Mason Pratt Types of Cofferdams Overview Cofferdams Barges Dredgers Conclusion Braced Earth-Type Timber Crib Double-Walled Sheet Pile Cellular Slurry Wall Specialty – Steel Framed, Inflatable

6 Marine Construction Tyler Mason Pratt Braced Cofferdams Formed from a single wall of sheet piling Driven into the ground to form a box around the excavation site The “box” is then braced on the inside Interior is dewatered Primarily used for bridge piers in shallow water ( ft depth) Overview Cofferdams Braced Cellular Barges Dredgers Conclusion

7 Marine Construction Tyler Mason Pratt How it Works Overview Cofferdams Braced Circular Barges Dredgers Conclusion

8 Marine Construction Tyler Mason Pratt Overview Cofferdams Braced Cellular Barges Dredgers Conclusion Cellular Cofferdam Circular cells are connected by diaphragms Deep excavations Used when the construction area is very large Also used when internal bracing is impractical

9 Marine Construction Tyler Mason Pratt Barges Overview Cofferdams Barges Dredgers Conclusion A barge is a large flat bottomed boat primarily used to, but not limited to, the transportation of materials and equipment. Most barges are not self propelled and require the use of tugboats to push or pull them

10 Marine Construction Tyler Mason Pratt Types of Barges Overview Cofferdams Barges Dredgers Conclusion Derrick Barges Jack-Up Barge Material Barges Dump Scows Hopper Barge Flexi Floats Semi-Submersible

11 Marine Construction Tyler Mason Pratt Jack-Up Barge Overview Cofferdams Barges Jack-Up Barge Hopper Barge Dredgers Conclusion A large barge with 4-8 legs lifting it up over the water. Legs are lowered to sea floor and lift the deck of the barge up.

12 Marine Construction Tyler Mason Pratt How it Works Overview Cofferdams Barges Jack-Up Barge Hopper Barge Dredgers Conclusion

13 Marine Construction Tyler Mason Pratt Uses Overview Cofferdams Barges Jack-Up Barge Hopper Barge Dredgers Conclusion These barges provide a stable platform for construction activities. The platform allows materials to be placed on a flat surface. Also provides a stable surface to conduct boring and piling. Cranes an other various equipment is mounted to the platform.

14 Marine Construction Tyler Mason Pratt Hopper Barge Overview Cofferdams Barges Jack-Up Barge Hopper Barge Dredgers Conclusion Used for transport of dry materials such as: gravel, sand, rock, etc. Barges are usually moved with tugboats or are self propelled.

15 Marine Construction Tyler Mason Pratt Uses Overview Cofferdams Barges Jack-Up Barge Hopper Barge Dredgers Conclusion Typically flat, long and open top. Used for transportation of dry materials from land to location of construction. Also used for transportation of materials dredged or removed from construction site.

16 Marine Construction Tyler Mason Pratt Dredgers Overview Cofferdams Barges Dredgers Conclusion A dredger is an ocean vessel equipped with a mechanism that collects material from the sea floor. It’s an excavation activity or operation carried in shallow seas or fresh water areas with the purpose of gathering up bottom sediments and disposing of them at a different location

17 Marine Construction Tyler Mason Pratt Uses Overview Cofferdams Barges Dredgers Conclusion Normally it is carried out to create a new harbor, or to deepen existing facilities in order to allow larger ships access. Dredging is a process that can be used to maintain the depth and width of existing water ways. The Sand spit at Morro Bay is dredged on a regular basis to keep access for small vessels available.

18 Marine Construction Tyler Mason Pratt Types of Dredgers Overview Cofferdams Barges Dredgers Conclusion Mechanical Dredgers Clam Bucket Dipper Dredge Ladder Dredge Hydraulic Dredgers Plain Suction Cutter Head

19 Marine Construction Tyler Mason Pratt Clam Bucket Overview Cofferdams Barges Dredger Clam Bucket Plain Suction Conclusion Definition: A crane or derrick mounted on a floating platform that uses a clamshell or dragline procedure to remove sediment.

20 Marine Construction Tyler Mason Pratt Plain Suction Overview Cofferdams Barges Dredger Clam Bucket Plain Suction Conclusion ◦ Operates like a vacuum cleaner. ◦ Lifts up loose sediment and carries it through a long pipe until discharged.

21 Marine Construction Tyler Mason Pratt How it Works Overview Cofferdams Barges Dredger Clam Bucket Plain Suction Conclusion

22 Marine Construction Tyler Mason Pratt Conclusion Overview Cofferdams Barges Dredger Conclusion Using these different pieces of equipment and following these practices are always required in the development of large structures at sea. Without these methods building a simple pier would be impossible. Innovation and creativity are obviously two of the main features that govern the success of a marine project. Development on a body of water can be a pain but it is necessary to keep trade and transportation flowing.


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