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floating out precast elements and assemble them to giant structures has a long history one of the better known examples is the floating harbor for the D-day invasion that was shipped from england to france with the troops.

Mulberry harbour a giant floating cube element serving as breakwater.

Newer examples: boxes floated out for costal wave defense and creation of artificial harbors.

Suggested floating port in U shape

Stadion seastead - just a big plate the size of a football stadion (stadium) - has been built and floated out already - just for use as a storage tank - not a seastead.

Palm Jebel Ali

Ecofisk tank ring breakwater floating out into the north sea in segments to be assembled on site.

Waterworld film set - built in 6 segments - assembled in the high seas of hawaii, film made in the open water weather exposed relaying on the protection of the lagoon - later disassembled into 6 segments and towed over the pacific to San Diego.

So most of the tasks for assembling a floating island of any size from precast elements is proven and tested engineering - it has just (not yet) been applied to seasteading

Wil

concretesubmarine.com

European Submarine Structures AB

a harbor with floating breakwater elements / a floating aquaculture unit / a floating ship repair facility /

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-- Edited by admin on Saturday 12th of November 2011 04:27:15 PM

floating breakwater

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Great Barrier Reef Australia tourism floating platform.

Powell River floating concrete barge breakwater

These concreteships are floating maintenance free since WW1/2 (concrete ships still afloat) steel ships from that period if not maintained under a strict 10 month paint job renewal shedule in drydock would have rotten and sunk decades ago.

Those old concrete barges that where built to transport supply over the pacific in WW2 form a floating breakwater for a wood operation - the barges that move the trunks collide frequently with the hulls and some of that collisions made holes into the breakwater - those holes where repaired with shotcrete from the outside. There is a detailed report about that repair available on internet. The report mentions that the rebar of the hulls after 70 years afloat with no maintenance is in excellent shape - so good that you can read the mill stamp on the rebar in the section where collisions picked the concrete away.

The powell breakwater is the oldest floating concrete shell structure we have in service - so what we get from there is first hand information how floating concrete structures deterioriate (or better absolutly not deterioriate) over long time periods.

In fact the time of service for a floating concrete shell along the lines of the powell ships seems to be no different to any concrete building on land. This is important for seasteading and ocean colonization in general. Because ocean colonization is a Real Estate development project in its nature. So the time of service of the structures is of essence. If you build a house on land you expect to heridate this living space to your children.

On the other hand any naval steel building structure (ships, oil platforms) is not supposed to live longer than 15 years - and it is supposed to undergo a complete service in drydock every 10 months during that service life or be maintained by divers changing anodes at sea in a even more expensive process. If you skip that tight and costly maintenance shedule for a steel structure in marine environment the structure will rust trough and sink within 2 years so not exactly what you need for a "real estate development".

This has a huge impact on the calculation of cost per squaremeter living space per day of service life. There is a factor 100 in cost difference between a steel shell and a concrete shell.

Concrete engineering today is settling to asign a 200 year maintenance free service life to floating concrete shell structures in marine environment. This is based on the experiences of the powell ships and several dozends of concrete oil platforms in the north sea.

-- Edited by admin on Wednesday 4th of January 2012 07:24:29 AM

admin wrote:

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Floating marina - an example -

admin wrote:

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a harbor with floating breakwater elements / a floating aquaculture unit / a floating ship repair facility /

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-- Edited by admin on Saturday 12th of November 2011 04:27:15 PM

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Latin America | Europe | Business Group | Industry Development | Wilfried-Ellmer-Consulting-Group™ |

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Bellingham Marine improves Canada’s Powell River Marina – expand mooring space

Yachts and visitors to Canada’s Powell River are enjoying the city’s new marina facility at the North Harbour.  The yacht harbour was completely renovated to address a growing waiting list for larger berths and a failing infrastructure.  Bellingham Marine, world renowned marina builder, supplied its Unifloat, concrete floating dock system, for the project.

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-- Edited by admin on Friday 21st of September 2012 04:02:11 PM

Dique seco astillero navantia Cadiz.

Picture Monaco Breakwater

Surface Floating Concepts:

The axes of ocean colonization / floating real estate building lots on the water / Plate Seastead - Plate Floating Element for Ocean Colonization / Catamaran Concrete Floating Elements - Base for Ocean Living / Floating Concrete Breakwater Marina / Ocean colonization how to get there / Ramform ship island as ocean base mobile stable scaleable / small honeycomb floating concrete structures in cartagena / Seabreaks for dampening colossal ocean waves / Ocean colonization technology / Ocean colonization company / Oustanding floating concrete structures / ocean colonization general considerations / Interesting projects for ocean colonization / Aquaculture, business, trade, mininig, energy, salvage, making money afloat /

Submerged Concepts:

The captain nemo float out - seasteading / Sub movement finished - Submarine Yacht / Is submarine living space expensive? / concrete pressure vessel / Concrete submarine project / submarine yacht / concrete submarine yacht supporter club / Submerged living space bubble concept basics / Exotic Submerged Bubble Hotel / sea orbiter / Current Turbine Concrete Hull /

http://nautilusmaker.com/uploads/default/original/2X/0/0dcbf345014f4cd31cfa5f7532dd5e50f5b2e5b3.jpg

Floating Concrete Breakwater Marina? I am sorry, but never heard of it. As a concrete stamped driveway contractor I like to know hoe those kind of driveways are built on floating on oceanic colonies.

- Ronald Philips

Floating out precast elements and assemble them to giant structures has a long history one of the better known examples is the floating harbor for the D-day invasion that was shipped from england to france with the troops. Dry Rot