Griffin Fluid Management Solutions

WHAT IS DEWATERING?

FROM MOBILIZATION TO DE-MOBILIZATION, DEWATERING SYSTEMS THAT WORK

Dewatering is a process that involves the removal of water from solid material or soil by various methods. This is a crucial step in construction, mining, and environmental remediation projects where the presence of excess water can impede progress or compromise the stability of structures. The primary goal of dewatering is to lower the water table or remove free water from the soil, making it more suitable for construction activities. Proper dewatering not only facilitates construction processes but also helps in preventing soil erosion, minimizing the risk of landslides, and ensuring the long-term integrity of infrastructure projects. Efficient dewatering strategies are essential for maintaining a dry and stable working environment in areas where water ingress can pose significant challenges.

WELLPOINT SYSTEM

Small excavations, low & high permeability soils, shallow aquifers

Wellpoint dewatering is a specialized method employed in construction and excavation projects to lower the groundwater table and create a dry work environment. It involves the installation of closely spaced small-diameter pipes, known as wellpoints, into the ground. These wellpoints are connected to a common header pipe, and a vacuum or low-pressure pump is used to draw water from the surrounding soil, lowering the water table within the wellpoint influence zone.

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Jobsite Deepwell

DEEPWELL SYSTEM

Deep excavations, high permeability soils, deep aquifers

A deep well dewatering system is a sophisticated groundwater control method used in construction projects, mining, and environmental remediation efforts where lowering the water table to a considerable depth is necessary. This system involves the installation of deep wells that penetrate into the aquifer or saturated soil layers. These wells are equipped with pumps capable of extracting large volumes of water from substantial depths.

EDUCTOR SYSTEM

Deep excavations, low permeability soils, stratified soils

An eductor system, also known as an eductor-jet pump system, is a fluid dynamics mechanism widely used for various applications, including fluid mixing, dredging, and dewatering. This system utilizes a principle of fluid dynamics where a high-velocity fluid jet, typically water or another liquid, is introduced into a venturi-shaped nozzle. As the high-speed jet passes through the nozzle, it creates a low-pressure zone that draws in and entrains another fluid, such as slurry or air, into the system. The combined flow is then discharged, effectively pumping and transporting the entrained fluid.

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SUMP PUMPING

Small excavations, low permeability soils, subgrade near bedrock

Sump pumping is the simplest, most cost-effective dewatering solution. Groundwater seeps into the excavation area, where it collects in sumps. Solids handling pumps then pump the collected water out of the excavation to a discharge point. This method is used in shallow excavations or when the soil has a high content of fine-grained material (ie. Clay/silt).

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