Figure 7. Predictive curve from dredged material self-weight and fixed-ring consolidation data

ERDC TN-DOER-D1

August 2004

Figure 7. Predictive curve from dredged material self-weight and fixed-ring consolidation data (to convert

pounds per square foot (psf) to kPa, divide psf by 20.8)

Numerous correlations between physical index properties and engineering behavior properties

are available based on published data. For example, Wroth (1979) has shown that

LI = log(170/cu) / 2

(14)

cu = 170 e -4.6LI

(15)

where

LI = liquidity index

cu = undrained shear strength, kN/m2

e = 2.718

For the soil compression index Cc, Terzaghi and Peck (1967) showed that

Cc = 0.009 (LL-10)

(16)

and Wood and Wroth (1978) showed that

Cc = Gs PI / 200

(17)

where

Cc = compression index = change in void ratio per effective stress log cycle change

LL = liquid limit percent

Gs = specific gravity of solids