Dewatering, or more accurately, unwatering, is a process of removing groundwater from an area. This step is necessary to create a dry-land environment in order to proceed with a construction project. There are several different methods when it comes to removing water from an area. And as it pertains to construction, cofferdams, combines with water pumps, are an effective solution to create an acceptable construction site.
There are many methods of dewatering an area including deep wells, horizontal drains, and wellpoints, among others. Here at Dam-it Dams, we provide a protective barrier to hold back water while it is being pumped away from the “dry” areas.
Cofferdams are especially useful when it comes to bridge repairs as they can be positioned around the base of the bridge, while the water is pumped out, allowing work to begin. Other uses for cofferdam dewatering include boat ramp repairs, canal repair, dredging, pipeline repairs, sewage treatment plants, as well as many others.
Dewatering is made much easier using a pre-fabricated water barrier like the ones that we manufacture here at Dam-It Dams. Our dams are made of high-tech materials and are designed to be portable, affordable, and re-usable. Our dams actually fill up using the on site water as well, so, in a dewatering scenario, there’s no need to use city water to fill up our product. The dam will begin to unroll in a controlled manner as it is inflated. Once the cofferdam is in place, pumps can be used to remove the water from the now enclosed area, so that work may begin or continue.
The cofferdam itself is one of the five parts that comprise a typical Cofferdam System:
- Cofferdam – a flexible yet durable water barrier made of high technology materials
- Water discharge pumps (2) – to draw in on-site water to inflate the cofferdam(s)
- Discharge hoses (2) – to transport water to and from the cofferdam(s)
- Restraining ropes – to assist with the unrolling and positioning of large cofferdam systems
- Connections – to couple together two or more cofferdams
Read more about cofferdam systems