marine construction scm 330 tyler mason pratt. overview cofferdams barges dredgers conclusion...
TRANSCRIPT
Marine Construction
Marine ConstructionSCM 330
Tyler Mason Pratt
Tyler Mason Pratt
Overview
Cofferdams
Barges
Dredgers
Conclusion
Today’s Agenda
• Overview• Cofferdams• Barges• Dredgers• Conclusion
Marine Construction
Tyler Mason Pratt
Marine Construction
Tyler Mason Pratt
Overview of Marine ConstructionOverview
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.
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.
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
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 shallowwater (30 - 35 ft depth)
Overview
Cofferdams
Braced
Cellular
Barges
Dredgers
Conclusion
Marine Construction
Tyler Mason Pratt
How it Works Overview
Cofferdams
Braced
Circular
Barges
Dredgers
Conclusion
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
Marine Construction
Tyler Mason Pratt
BargesOverview
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
Marine Construction
Tyler Mason Pratt
Types of BargesOverview
Cofferdams
Barges
Dredgers
Conclusion
•Derrick Barges•Jack-Up Barge•Material Barges•Dump Scows•Hopper Barge•Flexi Floats•Semi-Submersible
Marine Construction
Tyler Mason Pratt
Jack-Up BargeOverview
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.
Marine Construction
Tyler Mason Pratt
How it WorksOverview
Cofferdams
Barges
Jack-Up Barge
Hopper Barge
Dredgers
Conclusion
Marine Construction
Tyler Mason Pratt
UsesOverview
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.
Marine Construction
Tyler Mason Pratt
Hopper BargeOverview
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.
Marine Construction
Tyler Mason Pratt
UsesOverview
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.
Marine Construction
Tyler Mason Pratt
DredgersOverview
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
Marine Construction
Tyler Mason Pratt
UsesOverview
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.
Marine Construction
Tyler Mason Pratt
Types of DredgersOverview
Cofferdams
Barges
Dredgers
Conclusion
•Mechanical Dredgers• Clam Bucket• Dipper Dredge• Ladder Dredge•Hydraulic Dredgers• Plain Suction• Cutter Head
Marine Construction
Tyler Mason Pratt
Clam BucketOverview
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.
Marine Construction
Tyler Mason Pratt
Plain SuctionOverview
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.
Marine Construction
Tyler Mason Pratt
How it WorksOverview
Cofferdams
Barges
Dredger
Clam Bucket
Plain Suction
Conclusion
Marine Construction
Tyler Mason Pratt
ConclusionOverview
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.