The Mystery Behind How Underwater Structures Are Built

There are three main methods for constructing underwater structures.
Loukia Papadopoulos

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We all know of structures such as bridges, tunnels, and dams that are constructed underwater. This means that the structures have an added burden to their design.

Indeed, one does wonder how these underwater structures are built. Is there a special dedicated team of divers that take on these lofty projects?

The answer to that question is obviously no. Instead, engineers use one of these three underwater building methods: cofferdams, caissons, or drilled shafts.

Cofferdams are temporary structures that create fully enclosed spaces where the water inside is pumped out to leave a dry workspace. Although cofferdams can be very useful they can also be dangerous. If you want to know why watch the video.

Caissons are large concrete or steel boxes that are one solid structure, are pushed into the seafloor, and have their water pumped out. However, caissons are also very expensive and potentially dangerous. Watch the video to find out more.

Finally, drilled shafts are massive shafts that are drilled into the river or sea bed. Once the shaft is drilled, they can then be backfilled with concrete and other reinforcing structures. This method allows engineers to avoid the dewatering process making them safer than cofferdams and caissons. To find out more watch our video.

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