Construction dewatering and groundwater control new methods and applications pdf

Description

Dewatering systems are routinely used in the construction industry to provide temporary reductions in ground water levels for structures which extend to below groundwater level. Groundwater control extends this definition to encompass any pumping or recharge system used to manipulate groundwater levels for a range of purposes. This can be achieved in a variety of ways. The simplest form of groundwater control is sump pumping where groundwater is collected in a sump and pumped away from the excavation site. Sump pumping can be hugely cost effective, but excessive seepage and ground loss into the excavation can be both expensive and time consuming to deal with and can pose a real threat to the instability of the ground and adjacent structures. To avoid this risk, it may be necessary to use a pre-drainage method.