Well Point Dewatering System Procedure

By creating deep wells around the vicinity the groundwater is made to fall into them under the influence of gravity.

Well point dewatering system procedure.

Water is released at the rate of 20 to 25 liters per second at these well points which causes the soil to be dug and the well point to sink deeper into the ground. Deep well method of dewatering excavations just like the wellpoint method wells are drilled around the excavated area but the diameter of wells in this case varies between 150 200mm. A wellpoint dewatering system consists of a series of shallow wells known as wellpoints which are installed at a pre determined depth and appropriate spacing around an excavation. The main header pipe is connected to a wellpoint dewatering pump and then discharged either to a designated point or through a water treatment system depending on water quality.

In well point system the water is generally lifted by difference between ambient air pressure and the lowered pressure created by the pump. Wellpoint dewatering is a simple yet efficient method of lowering the water table in excavations. Well point systems a well point system consists of a number of well points spaced along a trench or around an excavation site all connected to a common header which is attached to one or more well point pumps. The following procedure is adopted in the well point.

The eductor well method is a dewatering process used to control pore water pressures in materials with low permeability characteristics such as fissured clays or silts. Ads can efficiently and effectively install a well point system to reduce construction downtime our experienced team has the know how to do this with minimal impact on program. Out of them dewatering by well point system is one of the best logical and economical method. Well point systems and ancillary dewatering equipment can be hired for short and long periods of time and individually to cater to the clients dewatering requirements.

Procedure of well point system. Well points are prepared at a distance of about 1m around the area to be excavated. In appropriate ground conditions a wellpoint system can be installed speedily and made operational rapidly. A filter media of 3 16 inches 3 5 mm screened black sand shall be inserted around the 3 4 depth of the wells to act as barrier against fines and prevent choking of well points.

Npe stock a large range of wellpoint pumps designed and proven to be the most effective for wellpoint dewatering activities. Operate the dewatering system continuously 24 hours a day until drain and structures have been constructed to fill material and until written by authorization to. Npe are the wellpoint dewatering professionals. Well point assemblies made up of a well point screen riser pipe and swing joint with tuning are generally installed by jetting.