A productive dewatering process requires a dependable pump to lift water from below ground. Several dewatering pumps are available in the market including submersible pumps, centrifugal suction pumps, and well-pointing piston pumps.
Choosing the correct kind of dewatering pump is dependent on several aspects, such as the nature of underground water, the water depth, the local topography, the neighborhood habitat (metro or rural), and the discharge distance required for water.
An overview of the key features of each pumping system is provided below.
In a Submersible pump, the pump unit is lowered (partly or completely) in the liquid it is pumping. Submersible pumps propel the liquid to a surface release pipe. Submersible pumps have the leverage of being installed at the same surface as the water (instead of high above it). Moreover, a submersible pump generally needs less space for operation.
Another variety of pumping units is the Centrifugal suction pump. In this category of the pump, the unit is stationed above the ground. Hence, it necessitates an extended pipe for suction (or inlet tube) to be hauled into the water below. It brings the groundwater to the unit on the surface via centrifugal force. An outlet pipe then discharges the water, often into a dewatering pond or tank, far from where the pumping was done.
One more option for a dewatering pump is a Well-point Piston pump. The pumps offer automatic self-priming and are displacement pumps. This indicates that these pumps can work with water, air, or a combination of the two instead of using a different pump.
These pumps can function dry without endangering the unit. Around the job site, individual wells (known as well points) are drilled. Each well-point is typically 40 to 50 mm wide and varies in length based on the depth of excavation. These well-points are attached to a surface mounted, automatic self-priming pump.
Sump Pumping is a reliable choice in various situations, as well as the most effortless, economical, and successful method for dewatering.
Sumps are holes or areas underground (farther down than basement level) where water is accumulated and transported away for dumping. A foundation pit is fitted with drains and sumps on one or more sides or edges. Groundwater is gathered by the drains and dispatched into the sump. Once in the sump, it is steadily evacuated.
Sump pumping utilizes gravity instead of force. This technique is used in hollow excavation sites, where the soil has excessive gravel and sand and or gravel composition. If the excavation site is substantial, this system can utilize a trench and a slender, confined sump alongside the excavation site. The groundwater seeps into the excavation area, where dewatering pumps can easily remove it.