Cofferdams as we all know is an enclosure in or around a water body for either water containment or de-watering or diversion or damming of an enclosed site. The general purpose of cofferdams is to create a dry environment for a project work. If you think that cofferdams are new and must be a result of some recent innovation then you are absolutely wrong because they have been in use since 1736 when it was first used. Though the technicality and functionality have improved over the years but it serves the same purpose. Today cofferdams have become the preferred choice for emergency situation like flood or dam repair or more general works like under water structure repair, sewage system, footbridge construction, water containment, dewatering a location for industrial work, water storage for livestock or agricultural use, erosion prevention, laying pipelines in river or lake beds and many more to mention here.
Cofferdams have numerous properties that make them more efficient than its traditional counterparts like earthen barriers, concrete wall and sandbags. Traditional mediums are not suitable when the emergency situation require quick response and also the man power that is required to setup the traditional mediums is very huge. Not only the man power but the cost of completing a project also increases significantly because there is a lot involved in setting up the traditional mediums.
So let us go through the features of cofferdams that make them unique and more efficient:
- When it comes to moving water filled dams from one place to another then there is nothing better a choice than cofferdams. It only require minimal machinery like a trailer or truck to be taken to the site. It is also very easy to install and only require least man power for water containment or de-watering at the site. Not only this but cofferdams adapts to any terrain or ground or damp place. This is because when water is filled up in its internal tubes it starts to blend itself with the surface and makes the other side dry for the project work very quickly.
- The manpower that is required in traditional mediums is huge because there are more efforts required in setting up a concrete wall, earthen barrier or placing the sandbags at the right place than setting up cofferdams. The portable dam doesn’t require much manpower because it needs some manual assistance and most of which is required when it start to get inflated when the water fill its internal tube and it starts to unroll.
- The cost of setting up a water filled dam is also very least in comparison to other traditional mediums. Cofferdams doesn’t require additional material to make it water leak proof, there is no additional work force required, it is easy to be carried around without the need of heavy machinery etc. All these thing makes the cofferdams an economical alternative for water containment or de-watering.
Beside this, cofferdams are very handy in emergency situation like flood or dam repair because setting it up is very easy and fast. So you can say that water containment and de-watering a site has been made real simple by cofferdams.