Dewatering system

How does a dewatering system work? What is dewatering, when is it use and methods? Dewatering is all we do Griffin Dewatering is the largest dedicated contract dewatering company in the U. We manufacture equipment and install dewatering systems for the most complex groundwater challenges in the construction industry.

Dewatering and construction dewatering are terms used to describe the action of removing groundwater or surface water from a construction site.

Normally the dewatering process is done by pumping or evaporation and is usually done before excavation for footings or to lower water table that might be causing problems during excavations. Dewatering involves controlling groundwater by pumping, to locally lower groundwater levels in the vicinity of the excavation. The simplest form of dewatering is sump pumping , where groundwater is allowed to enter the excavation where it is then collected in a sump and pumped away by robust solids handling pumps.

Dewatering of excavations are required at construction sites generally for foundation works. Various methods for dewatering of excavations are described. Firm and sound working conditions are indispensable when construction of buildings, powerhouse, dams, and other structures has to be executed.

Ejector (or eductor) dewatering systems are used to control pore pressures and to lower groundwater levels to provide stable working conditions in excavations. Ejector systems are able to extract groundwater and generate vacuum at the tip of wells and can be installed to depths in excess of 50-feet.

The wells, or “wellpoints,” are then connected to a headerpipe and pumped by wellpoint pumps that can handle both water and air. Dewatering systems are routinely used in the construction industry to provide temporary reductions in ground water levels for structures which extend to below groundwater level. Groundwater control extends this definition to encompass any pumping or recharge system used to manipulate groundwater levels for a range of purposes. This is also commonly referred to as construction dewatering.

Groundwater Cutoff: Exclusion of groundwater inflow into the area of construction by some form of low permeability cutoff wall or barrier e. Industrial Dewatering Solutions For Your Application Needs. Sludge Dewatering Systems Most wastewater treatment processes produce a watery sludge byproduct. Disposing of this sludge can often prove very expensive and for that reason, a sludge dewatering system is a great option for reducing costs. By dehydrating the solid byproduct, the weight and volume of product is reduce delivering major cost savings. Mine Dewatering Systems Our expert engineers will work with you to understand the specific dewatering requirements of your site, whether in-pit or underground.

Dewatering represents the process of removing water from soil or solid material by using filtration, centrifugation wet classification or other separation processes. Construction dewatering is a term that describes the process of removing groundwater from a construction site. Groundwater control or dewatering is the temporary reduction of pore pressures or groundwater levels to provide dry, stable and safe soil conditions in excavations below groundwater level.

Dewatering is used to facilitate the construction of the deep excavations that are required for lift stations, tunnels and other underground structures. The type of dewatering system and drainage system for an area is best dictated based on the soil and the geological conditions of the area. A conventional well system or well point system can be used if the soil below the water table of the area is deep, free draining sand and more or less homogeneous in nature.

This system features well points spaced around an excavation and connected to a common header, which is in turn attached to one or more pumps. Deeper excavations will require multiple stages of well point systems due to the vacuum limitation of the pump. Wellpoints are small-diameter (about - mm) tubes with slots. In gravels spacing required may be too close and impracticable.

In clays it is also not used because it is too slow. Basement De-Watering Systems , Inc.