P9 : Vibrating Wire Push-In Pressure Cell

The P9 Vibrating Wire Push-In Pressure Cell is normally installed in vertical boreholes and measures total horizontal stresses. They are often installed in stiff clay behind and in front of retaining walls, in soft puddle clay cores of old embankment dams and in glacial till adjacent to sea cliffs.

The Vibrating Wire Push-In Pressure Cell measures total earth pressures in all soil types. The cell is spade-shaped and pointed at one end. A piezometer within the unit allows the measurement of pore water pressure and therefore the derivation of effective pressure.