Contact Earth Pressure Cell, or "contact" cell is designed for measuring soil pressures on structures. One of the plates is thick and designed to bear against the external surface of the structure in a way that will prevent flexure of the cell. The other plate is thin and reacts to the soil pressure.
Jack-Out Earth Pressure Cell or "jack-out" cell is designed specifically for the measurement of soil pressures on the back side of slurry walls. The pressure transducer housing is connected directly and perpendicular to the thick back plate.
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| Figure 2.6 - Contact Pressure Cell |
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| Figure 2.7- Jack-Out Pressure Cell |
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