Groundwater Control & Dewatering
Wellpoint Systems
(Wellpoint dewatering using shallow wells)
Deep Wells
(High-capacity dewatering for deep excavations)
Cutoff Walls
(Diaphragm walls, sheet piling)
Drainage Design & Installation
(Subsurface and surface drainage solutions)
Groundwater Control & Dewatering
Effective dewatering services in DR Congo are essential to maintain dry, stable working conditions before and during excavation. Civissol’s groundwater control solutions help lower the water table, reduce hydrostatic pressure, and prevent construction delays or water-related hazards—ensuring safer, more efficient project execution.
- Keeps excavations dry and safe
- Reduces groundwater pressure on structures
- Supports efficient and uninterrupted construction activities
What are Wellpoint Systems?
Wellpoint systems are temporary dewatering methods used to lower groundwater levels in shallow excavations. They consist of a series of small-diameter wells—called wellpoints—connected to a header pipe and vacuum pump. These wellpoints are installed around the excavation perimeter and draw water from the surrounding soil to maintain a dry and stable work area. By continuously removing groundwater, wellpoint systems prevent soil instability, seepage, and flooding, which are critical concerns during foundation work, pipeline installation, or trenching. This method is particularly effective in sandy or silty soils and is commonly employed in construction and civil engineering projects requiring short-term groundwater control.
What are Deep Wells?
Deep well systems are a dewatering technique used to control groundwater levels in deep excavations or where high volumes of water need to be removed. These systems consist of vertical wells drilled to significant depths—often 15 meters (50 feet) or more—each equipped with a submersible pump that continuously lowers the water table. The pumped water is discharged away from the site, maintaining dry and stable conditions during construction. Deep wells are particularly effective in permeable soils such as sand and gravel and are commonly used for large-scale projects like basements, shafts, tunnels, and infrastructure foundations. Their high capacity and ability to operate at depth make deep wells an essential solution for managing groundwater in complex geotechnical conditions.
What are Cutoff Walls?
Cutoff walls are underground barriers constructed to control the flow of groundwater or contain contaminated soil and water. Typically made from materials like slurry (bentonite or cement-based), soil-bentonite mixes, or sheet piles, these walls extend vertically into low-permeability layers to block or redirect subsurface water movement. Cutoff walls are often used in conjunction with dewatering systems to isolate excavation zones, protect adjacent structures, or prevent seepage beneath dams, levees, and landfills. By reducing groundwater inflow and improving hydraulic containment, cutoff walls play a critical role in environmental protection and geotechnical stability across a wide range of civil engineering and remediation projects.
What is Drainage Design & Installation?
Drainage design and installation involve creating systems to manage surface and groundwater, protecting structures and maintaining site stability. This includes planning features like French drains, swales, and catch basins based on site conditions and water flow. Proper installation ensures water is effectively collected and directed away from critical areas, reducing erosion and foundation issues. Whether temporary or permanent, good drainage is essential for safe, long-lasting construction.
