|Other titles||Wellpoint system.|
|Statement||a reliable means of dewatering any wet soil, thus stabilizing and preventing mass movement of the material during excavation.|
|LC Classifications||TC970 .M6|
|The Physical Object|
|Pagination||1 p. l., 102 p.|
|Number of Pages||102|
|LC Control Number||45004063|
The most up-to-date guide to construction dewatering and groundwater control In the past dozen years, the methods of analyzing and treating groundwater conditions have vastly improved. The Third Edition of Construction Dewatering and Groundwater Control, reflecting the most current technology and practices, is a timely and much-needed overview of this rapidly changing s: 2. In appropriate ground conditions a wellpoint system can be installed speedily and made operational rapidly. A typical wellpoint system consists of a series of small diameters wells (known as wellpoints) connected via a header pipe, to the suction side of a suitable wellpoint pump. The pump creates a vacuum in the header pipe, drawing water up. Single Stage Well Point system – A well point consists of a pipe about 1 m long and 50 mm in diameter. It has perforations, which are covered with a screen to prevent clogging in. At the lower end, a jetting nozzle is provided. This nozzle also acts as a drive point. The well point is connected to riser pipe and is sunk into the ground by jetting of water. This method can be successfully adopted for the depth of excavation up to 18m. To know more about wellpoint system, refer Dewatering Method – Wellpoint system for waterlogged sites.
A wellpoint system consists essentially of a series of closely spaced small diameter water abstraction points connected, via a manifold, to the suction side of a suitable pump.. The wellpoint technique is the pumping system most often used for modest depth excavations, especially for trenching excavations. MULTI-STAGE WELL POINT SYSTEM • Well-point system is suitable for depths up to 6 m if the pump is installed at ground level. Soils have to be coarser. If the sand content of soil is more than 20 per cent, the well-point system can work in it. For excavations deeper than 6 m, multi-staged dewatering equipment can be used. Eductor System This system also known as the ‘jet eductor system’ or ‘ejector system’ or ‘eductor wellpoint system’ is similar to the wellpoint system. Instead of employing a vacuum to draw water to the wellpoints, the eductor system uses high pressure . The wellpoint installation requires little maintenance provided it is looked after properly. The pump should be adequately protected from the elements. It is recommended to switch the system on at least once a week during winter to reduce the risk of malfunction at the start of summer.
Wellpoint Systems Well Points: The Versatile Solution Ideal for shallow aquifers where the water level needs to be lowered no more than 15 or 20 feet, Griffin well point systems allow you to pump anything from a few gallons per minute in fine sandy silts to thousands of . Wellpoint Systems are the most commonly used dewatering method. A properly installed system will pre-drain and stabilize wet soils up to a depth of 17'. Additional stages can be installed if the excavation is deeper. The wellpoint system consists of a series of wellpoints usually jetted into place. Operating as one company, offering all products and services in each local market, we are easier to understand and engage with. Clients can be confident they’re getting the best, most competitive solutions, especially when these involve multiple techniques. four stage wellpoint system to construct the main wastewater pump station for the city of Izmir. The most significant soil parameter affecting the planning and design of the dewatering work is the coefficient of field permeability, and it has been directly measured by a large scale pumping test at the site.