EFFECTIVE WELLPOINT DEWATERING
Wellpoints can be installed quickly and easily in most ground conditions and is the most versatile type of dewatering. Used to control groundwater levels and create a dry and stable working environment, wellpoint dewatering can be used for excavations, trenches, foundations and structures that are being constructed below the groundwater level.
Wellpoint dewatering works by installing well points with either a jetting pump using water or via an auger with a hollow stem. These water well points are attached to a header pipe via flexible pipes with taps which allow the flows to be adjusted. These are attached to our modern fleet of super silent pumps which then send the water out through a settlement tank to be discharged to a suitable location. Alba have an extensive range of equipment to deal with every situation nationwide, night or day.
Deep Wells
Deep wells are effective where there are large volumes of groundwater to be removed and where the permeability of the soil is moderate to high. A deep well system is typically installed over a wide area beneath excavations of below 6m in depth and consists of a several wells, acting together to lower groundwater levels. This series of boreholes are installed inside or outside the excavation area and are lined with a slotted screen and granular filter pack through the strata.
They are pumped by electrical submersible pumps at the base of each well which is connected to the surface by a riser pipe through which water is pumped into a common header main before being discharged. As water is pumped from each well, the groundwater is lowered creating a cone of depression or drawdown around itself.
Alba Dewatering have the capabilities to deal with all aspects of deep well systems, including design, drilling, installation, pump testing, monitoring and on-site maintenance.
Shallow Vacuumed Wells
These are wells smaller in diameter and shorter than the traditional pumping well. A vacuum well draws the water quicker to the well than a standard gravity well and are also better in low permeability ground.
Ejectors
Wells are drilled and installed just like deep wells in lower permeability soils, High pressure water from a tank and supply pumps at ground level is circulated down the well into an ejector nozzle and venturi at the foot of the well. The water flow generates a vacuum in the well, drawing the groundwater in. It then returns to surface the excess water drained off and the rest of the water, and on to the supply pump for recirculation.
For further information about wellpoint dewatering contact us on 01283 585 700 or email contact@albadewatering.co.uk. Alternatively, reach out to our Facebook, Twitter, Instagram and LinkedIn pages for more information.
Example of our wellpoint dewatering services witch a cable run in sea at Ramsgate site
St Helens
St Helens
Royton
TESTIMONIALS
What our clients say
We used the guys at Alba a few years ago on a major project for some significant over pumping and control and the service was flawless – would recommend every time….
Our go-to dewatering specialist.
Couldn’t fault your company one bit, dealt with Chris from start to finish and it was a pleasure dealing with him, organised everything on site and your team carried out first class job for us.
We will definitely be using you again.
Brilliant service, very responsive and quick to attend to install, deal with any issues and demobilise.
“I’m emailing about the dewatering we have set up on site …. it’s all working which is fantastic … and a big thankyou to you and your team on that front.”
I spent a year in Barrow as Construction Manager for UU on this project with Farrans. The tidal range dictated the hours we worked and has to be one of the top 5 projects I have been involved in. The ground conditions were a challenge to say the least. When anyone says we have have bad ground, I always pull up videos from Barrow. Alba with Farrans and JD excavations worked with collaboration as a key focus to achieve the end goal. Without Alba the project would simply not have been completed on time and to budget.
Great workmanship as always. Works through all the elements!
Excellent company – would be delighted to use their services again if and when I have a requirement.
Alba advised and installed complex dewatering system on our site; the Alba Ops on the ground were very knowledgeable and installation went as planned.
On a few occasions I had to call the Alba Foreman for advice out of hours; each time the phone was answered and I was given instructions over the phone to rectify the problem.
… we were very happy with your service.From appointment to you being on site the time frame was very quick (a few days)…On site works were also hassle free.
We would be happy to use your services again
My colleagues and I at A Hak echo the praise and appreciation at the sterling work …the crew have done for us on the project. They faced a difficult task in the narrowest of working areas and they performed admirably.We were also extremely impressed at the way they mucked in generally, earning praise and respect from all.
Many thanks from all the team, and we will not hesitate to use Alba Dewatering again on future projects.
Interested?
Contact Alba Dewatering now on 01283 585 700 or contact@albadewatering.co.uk for a free quotation or more information on our expert services. Alternatively, reach out to us through our social media network – links are below!
