Seismic Dilatometer Testing (SDMT)
- The Seismic Dilatometer is an extension of the standard dilatometer test that now includes the true interval measurement of seismic wave velocity.
- Settlement in sands using the operative constrained modulus, M, determined from the DMT, or by the application of the strain softened small strain modulus as determined from the shear wave velocity.
- Liquefaction assessment based on correlations with the DMT horizontal stress index, Kd, and by the shear wave velocity.
- Determination of undrained shear strength (Su), coefficient of earth pressure (Ko) and the over consolidation ratio (OCR) in fine grained soils.
- Precise true interval seismic wave travel times measured every 0.50 m.
- Determination of modulus at both a small strain and a working strain.
- The DMT is more sensitive to a stress history, aging, cementation, and structure than other penetration tests (Totani et a., 2001).