Wellpoint systems are used to lower groundwater levels to provide stable working conditions in excavations. Wellpoint systems are particularly suited for shallow foundations, utility and trench work dewatering.
A wellpoint system consists of a series of closely spaced small diameter shallow wells. The wellpoints are connected to a common header pipe and are pumped with a high efficiency vacuum dewatering pump.
For drawdowns in excess of 15-feet, further stages of wellpoints are required and installed at successively lower levels as excavation proceeds.
Wellpoint System Design
Wellpoint systems consist of a series of small-diameter wellpoints installed at a pre-determined depth (usually 23ft deep or less) on relatively close centers.
- Quick to install & can handle a wide range of flows
- Wellpoints connect to a common header pipe via a swing-joint that runs to a vacuum-assisted centrifugal pump
The pump serves three basic functions:
- Creates vacuum and primes the system
- Separates air/water
- Pumps water to the discharge point
