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Wednesday, February 8, 2012
Inceptor Ditches | Civil Engineering
Inceptor ditches are used for excavation of limited depth
made in a coarse soil. These ditches are constructed around the area to be
dewatered. The ditches must penetrate deeper than the level of the work area.
At suitable locations, sump pits are constructed along the
ditch for installation of the pump to remove the water collected.
If the soil is fine sand of low permeability, boiling may
occur in sumps and ditches. This may be prevented by placing filter layers on
the sides and at the bottom of the ditches and sumps.
Interceptor ditches are most economical for carrying away
the water which emerges on the slopes and near the bottom of the foundation
The method can be effectively used for formation, gravel and
coarse sand. In fine sands and silts. There may be sloughing, erosion or quick
conditions. For such soils, the method is confined to a depth of 1m to 2m.