STANDPIPE PIEZOMETER
Simple and economic measurement of groundwater pressures in soil and rock can be carried out using Casagrande type (standpipe) piezometers.
Geosense® Casagrande piezometers are made up of low air entry porous plastic or ceramic elements which are connected to standpipe tubing and lowered into a predrilled borehole. Alternative types may be driven or pushed into soft soil.
Where Casagrande type piezometers are being installed then the porous element is surrounded by filter sand and a Bentonite seal placed above this response zone.
Water level measurements are normally taken using a water level meter (dip meter) or in the case of artesian pressure a Bourdon pressure gauge is attached to the top.
| Brands | Geosense |
|---|---|
| Materials | HDPE, Alumo Silicate, PVC |
| Tip pore size | 60µ |
| Tip permeability | 3 x 10-4 m/s |
| Standpipe Thread | ¾” BSPM |
| Standpipe length | 1, 3m |
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