The Genius Inventions Found by Ports to Protect Themselves Against Giant Waves

Welcome back to the FLUCTUS channel for a discussion about the amazing technology used to prevent flooding, erosion, and other water damage in coastal structures.
Fluctus is a website and KZbin channel dedicated to sea geeks. Whenever you are curious or an incorrigible lover of this mysterious world, our videos are made for you !
We publish 3 videos a week on our KZbin channel and many more articles on our website.
Feel free to subscribe to not miss any of our updates and visit our website to discover additional content.
Don’t forget to follow us on twitter:
/ fluctusofficial
Please keep the comments section respectful. Any spam, insults or troll will be deleted.
To contact us, make sure to use our email in the about section of this channel.

[@colinedwards7367]

Originally designed by:- The Dolos was designed in 1963 by a South African harbour draughtsman Aubrey Kruger, and were first used on the breakwater in East London, a South African port city. They work by dissipating, rather than blocking, the energy of waves. The Xblocks are based on Krugers design.

[@clivesymons853]

I was waiting for them to mention that?

[@reonvanwijk]

Kruger took inspiration from the configuration of spinal column bones. Legend has it that he was eating lunch at work, which consisted of ‘leftover’ oxtail stew. The design is ingenious in that the more the waves move the Dolos the tighter they interlock. He was originally working on a design to build a safe harbour for resettlement of the island of Tristan da Cunha after the devastating volcanic eruption that destroyed the original settlement on the island. He received no royalty for his design since he was working for the government harbours department. The design was not patented and was freely available for others to subsequently copy over the decades.

[@tomsreviews238]

I am from NJ and they refurbished one of the main inlets with dolos back in the 1970s and they haven't moved an inch since then. I believe they used them prior to that on the US West coast.

[@nfwolfaardt]

The patent actually went to a French engineer in 1950... the Americans copied it in '59, the British copied it in '61, the Dutch in '62 and Kruger in '63... each one just shaped it to their own design.

[@williamgibb5557]

Years ago in Ocean City,NJ, they made the jetty very tightly to nearly stop the water flow along the beach. This in turn created an edy effect that washed the beach away on the back side. Secret is to slow the wave action and not try to stop it completely .

[@Getayabbyupya]

The tetrapods remind me of anti tank blocks used in WW2 , very interesting video thankyou !.

[@aais69abc67]

Invented in south africa. Thank you

[@reonvanwijk]

Kruger took inspiration from the configuration of spinal column bones. Legend has it that he was eating lunch at work, which consisted of ‘leftover’ oxtail stew. The design is ingenious in that the more the waves move the Dolos the tighter they interlock. He was originally working on a design to build a safe harbour for resettlement of the island of Tristan da Cunha after the devastating volcanic eruption that destroyed the original settlement on the island. He received no royalty for his design since he was working for the government harbours department. The design was not patented and was freely available for others to subsequently copy over the decades. Re: Wiki - ‘The dolos was invented in 1963, and was first deployed in 1964 on the breakwater of East London, a South African port city.’

[@moosesnWoop]

I heard it was inspired by black jacks

[@garymiller5937]

You produce absolutely awesome videos. Interesting, well thought out, professionally made. Keep up the great work. I always look forward to your new releases 😊

[@VAMobMember]

What about using those TetraPods off the FL coast (etc) to slow down waves and such from hurricanes?

[@mattharper588]

I’m not a scientist or very smart person but I winter in Texas and Florida and the most damage from hurricanes is the wind

[@VAMobMember]

@@mattharper588 mid-Atlantic Agree wind is bad but last two to hit FL had HUGE flood damage according to national news media

[@play_2003]

Sea it’s always beautiful 😍

[@donbrashsux]

Except for all the staggering rubbish floating in it

[@amosjames7827]

Biggest fan

[@There.Is.Only.Now.]

Big fan from India

[@jessrichardmoransee5468]

Excellent programs thank you and happy Easter

[@bradolsen8629]

Keep those awesome videos coming nice work thank you

[@DouglasOrtizMD]

Very interesting! 👏🏻👏🏻👏🏻

[@kirkwilliams5740]

Thanks for sharing this teaching with us, I learned a lot.

[@abenezerfantu6086]

Amazing

[@almeidacheang7853]

bom trabalho amigo

[@blakelauder2214]

Really big rocks work just as well.

[@koosvanzyl2605]

Invented by a South African.

[@diogeneslantern18]

The Dolos is a SA invention, but the first design in question is a tetrapod. The only time a Dolos is shown is at 2:30

[@Nuevo_tipo-amoladora_angular]

Muchas gracias!

[@gerhardsteenkamp8759]

Dolose proudly south african!!!

[@jantang1218]

God bless invention found

[@kenheise162]

Called them sea jacks when we lived on Okinawa in the early 80’s.

[@markusdecimus4732]

Best u can see is in Constanta harbor in Romania. 20 t stabilopods. Most efficient stuff against storms.

[@reynaldogoico876]

Can also use as main battle tank barrier

[@joebond5012]

I wonder how much each one costs.

[@juvanmagsayo]

Thanks for interesting videos give more knowledge Water Breaker also known as (TETRAPODS) unfamiliar.

[@cyclonicleo]

Even better are systems that allow for marine habitat to form under the wave surface. Not only do these then allow for a more natural approach but marine ecosystems are created, and heck, recreational fishers can throw a line out for a catch!

[@nancymolina10195]

Wish other countries should have it too. Like Japan has tsunami in every few years, but now there’s no news about tsunami came this year.

[@andrewsneacker1256]

these thing arent gonna do shit to tsunami.

[@quietguy2407]

Seen some dudes doing a parkour video on it, I thought it was something left from the World War like a steel Hedgehog but for ship, until i found out about its purpose recently.

[@rngalston]

another example of how our race is using tech and know how to control our environment and tame nature

[@sammoore9120]

Tetrapods were invented by a US Navy Civil Engineer Officer. When I was at CEVOS (Civil Engineer Officer School) they told us they were not used. I saw them in use in Rota Spain. Im kind of glad to see them in use in more places now

[@joestevens3348]

First invented by a South African engineer in 1963 working for the SA Ports authority. Not an American

[@sammoore9120]

@@joestevens3348 no first invented by a US Naval Civil Engineer in 1956.

[@joestevens3348]

Prove it!

[@reonvanwijk]

My mother, who is 94, worked with Aubrey Kruger in the same harbour drawing office in South Africa. See my comment on the inspiration for the design. It is pretty common knowledge in engineering circles that Aubrey Kruger formulated the original concept.

[@sammoore9120]

@@reonvanwijk it is not my fault that Audray decided to copy a US Navy design. But regardless of who invented it, it is ineffective

[@Tipp_Of_The_Mitt]

Must be one hell of a pump moving that silt or whatever it is at 5:58

[@juanmacarava4240]

Deben de colocarlos en Corwall para no perder el casco historico x las tormentas....

[@kalmdwn7711]

combo with mangroves

[@milesaway3422]

Is there any rebar used inside the tetrapod?

[@andrewsneacker1256]

no

[@Frostbyte501]

Hail tetrapod

[@lawrencekleyn3914]

these concrete interlockers were invented in South Africa

[@ozcandurmusoglu]

You say tetrapod but show dolos more than tetrapod😅

[@armando_az1]

The first time I saw those thinks was in GTA V behind the airport. 😮

[@TopAhmed1]

I saw them in parkour videos someone jumping on them

[@jamesturnbull9328]

What was that black stuff mixed with water at 6 mins?

[@user-wz9oe8oy8y]

The coast lost the flower, it was not the coast!

[@Einwetok]

Looks like big caltrops

[@LloydNgakuru-ub9xn]

Hey brutha Nz in the house

[@martinpacillos]

😱

[@dcentral]

How come the concrete molds are not reinforced with rebar? Isn’t concrete weak without rebar?

[@wolverines5279]

Its more or less a yes and a no problem with rebar is that it degrades the concrete sooner

[@BariumCobaltNitrog3n]

Rebar is used in bridges, buildings, skyscrapers, homes, warehouses, and foundations to increase the strength of a concrete structure. Rebar is not necessary for every concrete project. It can corrode easily when exposed to water or air, and so significantly reduces the lifespan.

[@reonvanwijk]

Concrete in isolation is good at resisting compressive forces. Rebar is used used in concrete to resist tension, bending moment and shear. These are forces experienced typically where concrete has to span a distance/opening. In this instance concrete is being used primarily for mass and is acting in compression. As others have written. In certain instances rebar reacts negatively to the atmosphere and corrodes and expands, which results in more damage than enhancement to the structure. This negative corrosive reaction would be massively multiplied in a salt water environment.

[@bobsnabby2298]

The design is pretty bad, the iron hook on top is just extra part to be attached, better is to use a mold shape that would form a spot where it could be lifted. When this iron rusts off, it becomes very difficult to lift.

[@reonvanwijk]

Once lifted and dropped into place, they will never be moved again. The steel lifting hoop is considered sacrificial and redundant once the unit is positioned.

[@thanhha4560]

😢

[@truckersforfreedom4535]

They were used since the 60s in Romania by the communists you can see them in Constanta in the ports. Still work today

[@wiwingmargahayu6831]

yeah dont eat bacon or pork

[@pandaxox5349]

Not very informative.

[@artistnumber12]

@post10