The deep well system is also a versatile predrainage dewatering

system which can pump high and low volumes of groundwater.

This method is best suited to homogeneous aquifers that extend well

below the bottom of the excavation.

Deep well systems consist of one or more individual wells, each of

which has its own submersible pump at the bottom of the well.

Deep well systems are suitable for water-table or confined aquifers

and will lower the water table 100 feet or more in a single lift without

staging.

Advantages

Ability to penetrate strata impervious to the jetting method of wellpoint systems

Installation of up to 100 feet deep or more in a single stage

Capable of pumping tens to thousands of gallons per minute per well

Deep Wells can be effective when placed outside of the jobsite work area

Deep Well System

Deep Well System

Deep Well System

The wellpoint system is one of the most versatile of pre-drainage

methods which can pump a few gallons per minute in fine sandy silts

or many thousands of gallons per minute in coarse sands and

gravels.

A wellpoint system consists of a number of wellpoints spaced

along a trench or around an excavation site, all connected to a

common header, which is attached to one or more wellpoint pumps.

A wellpoint systems are most suitable in shallow aquifers where the

water level needs to be lowered no more than 15 or 20 feet. Due to

the vacuum limitation of the pump, excavations that are deeper will

require multiple stages of wellpoint systems.

When designing a wellpoint system, it is necessary to give first

consideration to the physical conditions of the site to be dewatered.

Wellpoint System

Wellpoint System

Wellpoint System

Wellpoint System