Cofferdams are utilized to dewater construction sites. They are used to divert or contain water whenever working in the water requires dry conditions or less wave actions for personnel or equipment.
Marine construction: working in water sometimes require dry or semi-dry conditions. water inflatable dams are a good alternative to other types of cofferdams. They have no adverse impact on the environment as they use the available water onsite, they are fast to deploy and fast to remove once the project is done. Water inflatable dams are inexpensive dams when compared to other cofferdams. Working in creeks sometimes require two cofferdams to be deployed one downstream and one upstream to keep water from the construction site.
Water barriers against fast moving water: Cofferdams are also used in river beds to slow down water flow. For this type of application, Water inflatable dams like FLEXIDAMS are anchored on the river bank and deployed upstream from the construction site.
There are different types of this chamber, and the difference is solely dependent on the purpose. Various construction materials are used differently, and this depends on the initial plan. However, regardless of the cofferdam structure and design, some of the following vital aspects affect the construction as well as the construction timing.
The first and the most important aspects are to determine how the water can go up in case of a flood and the velocity of water. These two aspects are some of the best guidelines while constructing a good cofferdam. The second aspect is the design. Different designs give a different kind of the final structure.
A cofferdam can be constructed in any shape. However, for economic reasons and practicalities, the most common cofferdam shapes are either circular or rectangular. Rectangular cofferdams, unlike circular cofferdams, are more common and are easier to construct.