DEEP WELL | WELL-POINT | DEWATERING
When specialized solutions are required for excavations that extend beyond the ground water table and reliable site dewatering systems are required, Whitewater is recognized as the best in class dewatering designer and service provider.
Single-stage well-point dewatering systems are frequently the most effective means of achieving an appropriate draw down in shallow excavations. For deeper excavations, a second stage of well-points or a deep well system might be built.
The professional engineering staff at Whitewater reviews the geological report, collaborates with the environmental consultant, and provides a comprehensive dewatering package that includes a dewatering plan, equipment specification and recommendation, filtration, and groundwater monitoring.
Proper installation of well-points or Deep Well dewatering equipment, as well as continuous monitoring of the dewatering process, results in increased system efficiency and cost savings. Whitewater staff are highly trained, which translates into attaining desired outcomes within a specified deadline.
For over a decade, our team has provided the construction industry with well-point and deep well dewatering solutions. We have developed the technology and knowledge necessary to address nearly any pumping problem as a result of our vast experience locating the appropriate dewatering solutions for both large and small projects.
Our well-point or deep well dewatering services have been simplified via the use of engineering professionals, field workers, top-of-the-line equipment, and studied strategy.
We provide complete dewatering services and well point dewatering systems to satisfy all of your well point dewatering, ground water control, ground stabilization, deep well dewatering, sewage bypass, river diversion, open pumping, and hydraulic submersible pump applications.
We provide a variety of well-point dewatering pumps, submersible deep well pumps, and piston pumps powered by diesel or electric motors. With a decibel value of 56 dBA at ten meters, our quiet devices are ideal for noise sensitive environments.
Whether it’s a planned project or an emergency, we’re here to assist you with the most efficient and effective well-point dewatering solutions, also referred to as sand-point dewatering and deep well dewatering.
Wellpoint Dewatering, also known as Sandpoint Dewatering, is a method used to stabilize soil.
While well pointing is used to drain an excavation, it is also utilized to stabilize soils that include silts or sandy silts. This is accomplished by the application of vacuum, which is often created by pumps. Simply put, the vacuum generated raises the hydraulic gradient of the casing flow to the well point / header, which is beneficial for drawing down more than 18 to 25 feet of ground water in impermeable soils. Apart from having a wet excavation, why do Whitewater’s designers, engineers, and technicians focus on all ground and site-specific variables necessary to stabilize soil and offer a dry excavation?
Dewatering, in general, refers to the process of redirecting ground water, lowering the ground water table, and simply reducing the water content in foundation soil in order to completely dry and stabilize the soil within an excavation, ensuring the long-term use of assets such as water, gas, or oil pipelines.
Any engineer who works with soils should be familiar with the connection between soil and water. This is where Whitewater earned client confidence and a strong reputation for dry excavations. The designers of Whitewater take ground water hydrology into account, focusing on water flow characteristics in terms of direction and amount, as well as subsurface soil conditions. The designers and technical product representatives at Whitewater work to guarantee that our clients understand the benefits of reduced pore water pressure and the resulting increase in soil stability and strength. The overall effect is an improvement in slope stability and the necessary increase in bearing capacity for the long-term use of infrastructure such as water and oil pipelines.
Not only are well point dewatering systems necessary for civil engineering projects, but they are also deployed / installed in other sectors like as mining.
The following are the advantages of a properly planned, installed, and running dewatering system:
To minimize or avoid frost heaving during excavation and installation, this might include seasonal variations but is not limited to. Heaves impose additional strain on pipe systems.
To stabilize naturally occurring or man-made slopes.
To mitigate erosion on the surface.
To reduce the compressibility of granular soils.
To alleviate lateral stresses on retaining walls and foundations, even when sheet piles are used r educed ground water pressure contributes to the safety and stability of the system.
To enhance the carrying capacity and strength of compacted foundation soils.
To keep working areas dry, such as dam excavations, construction foundations, and tunnels.
To avert piping, a process characterized by the movement of soil particles via groundwater.
To enhance the transportability and/or workability of borrow pit materials.
Concentrating on a few factors reveals that the procedures employed to dewater soil differ. Whitewater’s designers employ distinct approaches for coarse and fine-grained soils. It is possible that coarse-grained soils can be dewatered simply by allowing drainage into ditches, slumps, and wells and then pumping the collected water to a predetermined disposal point. Consult with the experts at Whitewater if further filtering (such as discharge rules for dissolved iron, which are controlled in certain regions of Canada) is necessary; this may involve storing water for sampling.
However, gravity drainage is incompatible with fine-grained soils. Drainage will be harmed and could become inefficient or extremely sluggish. Due to the fact that this form of soil dewatering involves forced consolidation, selecting the right dewatering procedures for ground water control requires the knowledge of Whitewater’s specialists. These include electro-osmosis, big casing boreholes with submersibles, and well point dewatering, also known as sand point dewatering. These can be used successfully in combination or independently in certain circumstances. Along with drainage and seepage, Whitewater engineers incorporate geosynthetic filtration into our system designs to ensure long-term success and healthier water disposal. This was demonstrated in many recent projects completed and maintained by the Whitewater team in Eastern Alberta and Saskatchewan, where the ground water was highly turbid and the Whitewater-installed system removed all particulates without the need for further discharge water filtering.
To conclude, conventional dewatering techniques primarily utilize gravity flow methods such as open ditches, bore wells, and submersible pumps, as well as well point or sand point systems and other vacuum dewatering applications.
This article will discuss the method of well-pointing systems. When this technique is used, the vertical wells are closely spaced 1 meter (3′) to 3 meters (10′) apart and are connected via a common header pipe to the vacuum pump. In many applications, it is also recommended to have a standby or backup vacuum pump on-site for unforeseen or planned maintenance situations. The diameter of the pipe wells may range from 35 cm (1 1/2”) to 50 cm (2”).
Well points are installed using high pressure water jetting or augured using the newly designed Whitewater auguring system, which eliminates the need for high pressure pumps and on-site water storage, resulting in less congested, cleaner sites, and safe, fast, and easy well point installation. Once the bored wells are constructed to the desired depth in each instance, the hole is filled with specially sized filler materials. This procedure is also known as sanding in. To initiate the flow of water to wells, the entire system is vacuumed. The vacuum is applied to the wellpoint tip’s filling portion, which is then sealed off to preserve the vacuum state. Atmospheric pressure pulls water toward the well, resulting in increased seepage. This input water level may be extremely low, necessitating periodic pumping of the well to discharge collected water; this is referred to as tuning the points. In some cases, the well pointing system operates continuously, pumping water to the surface and via Whitewater iron removal filters. The net vacuum utilized at the well site is calculated by subtracting the lift in the riser pipe from the vacuum created in the header pipe. Whitewater’s trained technicians exercise considerable caution to guarantee that all vacuum system connections are airtight and maintain this condition throughout the duration of the project. In some cases, Whitewater’s designers will insert extra well sealing materials, such as bentonite, to the top of the well point riser pipe to ensure the needed long-term seal is maintained.