Efficient dewatering is essential in ensuring safe and stable ground conditions during excavation or foundation works. Whether it's for casting slabs, laying substructures, or preventing water ingress in below-ground activities, dewatering keeps the work area dry and stable. At XPS, we assess the specific conditions of each project and implement the most suitable system for effective groundwater control — always in compliance with local discharge regulations. We primarily utilize two proven methods based on site depth, soil permeability, and groundwater levels: Wellpoint Dewatering and Deep Well Dewatering.
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Wellpoint dewatering is ideal for shallow excavations in sandy or silty soil. It involves installing a series of small-diameter wells (wellpoints) connected to a header pipe and a vacuum pump. This system lowers the groundwater level around the excavation area, making it safe and dry for construction. It is quick to install, highly adaptable to tight spaces, and effective for trenches, pipelines, foundations, and utility works.
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Deep well systems are used for deeper excavations or where high volumes of groundwater must be removed. Vertical wells, fitted with submersible pumps, are drilled around the perimeter of the excavation. These pumps continuously extract groundwater and discharge it to approved locations. Deep well systems provide more powerful and consistent dewatering, suitable for large projects or cohesive soils with lower permeability.
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