Deep well dewatering is
recognized as a cost effective and efficient way for medium to long term
dewatering of larger projects where the excavation is greater than 4m or when a
WellPoint system is deemed inefficient.
Web: http://www.swandewatering.com/
Our system has many advantages:
•
Minimal noise
•
Easy to install
•
No
limits on drawdown
•
Fewer
Deep- wells required than well system
The
main objective in any dewatering exercise is to lower the water table below the
working platform and maintain the reduced level economically and efficiently
for the duration of the dewatering period.
 |
| Deepwell dewatering principle |
The
soil profile and its permeability in and around the site will determine which
type of dewatering system will be most effective. This in turn will allow SWAN DEWATERING to formulate the number
and size of wells required to lower the water table for excavation. Positioning
may also be considered to suit the client’s construction requirements.
Groundwater
management involves strategic positioning of wells to provide a dry working
platform and to limit the effects on the groundwater table (GWT) beyond the
site. The reduced water table forms a cone of depression between the natural
GWT and the submersible pump.
 |
| Dewatering cone of depression |
The extent of local reduction in the water table is dependent
on the pump depth, capacity and the permeability of the soil. The depressed
water table at distance (say H) from the natural GWT depicts the dewatering of
a typical high-rise site.
 |
| Dewatering Reduced waterlevel |
