Well Point Dewatering Procedure

Wellpoint method of dewatering excavations 1 a series of wells of required depth are created in the vicinity of the excavated area from where the water has to be pumped out.

Well point dewatering procedure.

A typical wellpoint system consists of a series of small diameters wells known as wellpoints connected via a header pipe. Wellpoint dewatering also known as spear point is an effective dewatering technique. 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. Well points are prepared at a distance of about 1m around the area to be excavated.

Procedure of well point system. The wells are arranged either in a line or a rectangular form where the wellpoints are created at a distance of at least 2m from each other. Wellpoint dewatering is widely used for excavations of shallow depths especially for pipeline trench excavations.