Vibrating Wire Push-In Pressure Cell
A Push-In Pressure Cell, also called Spade Cell, is designed to be pushed into the ground where it can measure total earth pressure and pore water pressure within the soil. It can be used as a site investigation tool to determine the in situ stress state, both vertical and horizontal, depending on the direction of installation. In addition, it can be used to monitor the change in active and passive pressure around retaining structures (diaphragm walls,…) as well as in tunneling, and other earthworks. Typical installations are in fine grained cohesive soils, including very soft to stiff clays.
- Site investigation tool for estimation of in situ horizontal stress.
- Risk assessment of hydraulic fracture of clay cores or cut-off trenches in dams.
- Stress change adjacent to retaining walls.
- Measurement of vertical and horizontal stresses to monitor clay cliffs degradation.
- Monitoring stress redistribution around tunnels in soils.
- Capacity of 350, 700 kPa and 1, 2, 3, 5 MPa.
- Over Range of 150% F.S. (maximum).
- Resolution of 0.025% F.S. (minimum).
- Accuracy of ±0.1% F.S.