Main dewatering methods
In wellpoint dewatering wells are drilled around the excavation area and submersible pumps are installed into the wells. The pumps in the wells are connected to a header pipe and the groundwater is drawn by the pumps into the wellpoints through the header pipe and discharged.
In deepwell dewatering, one or several individual wells are drilled, and a submersible pump is placed in each shaft. Deepwell dewatering is best suited for deep excavations where large water volumes need to be discharged.
During for example maintenance of sewer lines, the sewage flow is pumped around the pipe that is being repaired using suitable dewatering pumps. The pumps are installed upstream of the maintained pipe. Bypass dewatering is also common in irrigation- and construction projects.
Stormwater and heavy rainfall create large amounts of water that needs to be removed. Pumps that can move high flows of water against low head are needed.
A tunnel construction is a complex worksite were many different variables need to be taken into consideration, flooding is one of them. There are many different dewatering solutions that can be needed which for all of them, we can provide.