Wellpoint Dewatering
Wellpoint dewatering system
Wellpoint systems are used to lower groundwater levels to provide stable working conditions. They consist of a series of small diameter wells that are connected by a header pipe to a wellpoint pump. The pump creates a vacuum in the header pipe drawing water up from the ground.
Welpoints are typically installed along or around an excavation. The height to which water can be drawn by vacuum in this way is approximately 6 metres. To function at greater depths, well points can be installed in stages as the excavation proceeds.
Why Use Wellpoint Systems?
Wellpoint systems are particularly suited to dewatering for shallow foundations and excavations, so they are often used for pipeline trench work. A wellpoint system can be installed quickly in most ground conditions and they are easy to maintain.
With perhaps one of the most extensive and modern fleet of wellpoint installation equipment around, WJ have installed wellpoint dewatering systems all over the world for a wide range of projects from major infrastructure projects such as Crossrail in the UK, Eglinton LRT in Toronto and Dubai’s International Airport, to small city centre basement extensions, and everything in between!
Range of application for wellpoint dewatering systems on construction projects (based on CIRIA 515, London 2000)
Featured Wellpoint Projects
Eglinton Crosstown Light Rail Transit System
The Eglinton Crosstown Light Rail Transit (ECLRT) project
Cross Cut Completion at Oakwood Station
A challenging commission, which combined difficult dewatering conditions with innovative construction techniques.
Sump Pit Completion at Caledonia Station
In the world of dewatering, clay is clay. No matter how thin, a continuous layer can quickly change dewatering requirements.
Quick Turnaround Dewatering at Science Centre Station
When CTS construction teams unexpectely found groundwater at the bottom of the Eglinton Crossrail excavation, they called WJ for help dewatering the site.
