Measurement of Stresses and Strains in Soils

Eyes in the Soil

In-Soil Pressure and Stress Measurements

 

Normal Soil Pressure (Stress)

Normal pressures have been measured either using in-soil Null Gages or Hybrid Soil Pressure Transducers

Measurements and applications can be either monotonic, in which cases in-soil Null Gages are very efficient (see publication of technology) or (check out a field application) or pseudo-dynamic in which cases a Hybrid Soil Pressure Transducer produces very dramatic results (see publication on its appliation to soil compaction).

Shear stress

Shear stresses are measured with a newly tested in-soil shear stress sensor.

When used in tandem with a novel device to measure local shear distortions the result is the ability to determine shear stiffness directly.

Measurements and applications with these new devices can be either monotonic or pseudo-dynamic.