Table 4.

Proposed correlations for clay-like and silty-like soils.

Soil Type	Parameter	Regression
Clay and clays mixtures	$E_D/{{\sigma }^{\prime }}_{v0}=7.25·{\left(Q_{t1}\right)}^{0.84}$	$R^2=0.713$
	$K_D=2.06+0.17·Q_{t1}$	$R^2=0.731$
Clay	$E_D/{{\sigma }^{\prime }}_{v0}=11.62·{\left(Q_{t1}\right)}^{0.55}$	$R^2=0.851$
	$K_D=1.85+0.2·Q_{t1}$	$R^2=0.853$
Silty clay	$E_D/{{\sigma }^{\prime }}_{v0}=7.17·{\left(Q_{t1}\right)}^{0.87}$	$R^2=0.662$
	$K_D=2.04+0.17·Q_{t1}$	$R^2=0.693$
Silt and silty mixtures	$E_D/{{\sigma }^{\prime }}_{v0}=22.31·{\left(Q_{t1}\right)}^{0.64}$	$R^2=0.653$
	$K_D=1.05+0.14·Q_{t1}$	$R^2=0.548$
Clayey silt	$E_D/{{\sigma }^{\prime }}_{v0}=12.85·{\left(Q_{t1}\right)}^{0.73}$	$R^2=0.612$
	$K_D=1.65+0.16·Q_{t1}$	$R^2=0.593$
Silt	$E_D/{{\sigma }^{\prime }}_{v0}=22.31·{\left(Q_{t1}\right)}^{0.64}$	$R^2=0.653$
	$K_D=0.83+0.15·Q_{t1}$	$R^2=0.647$
Sandy silt	$E_D/{{\sigma }^{\prime }}_{v0}=47.52·{\left(Q_{t1}\right)}^{0.47}$	$R^2=0.467$
	$K_D=1.02+0.1·Q_{t1}$	$R^2=0.496$
Silty sand	$E_D/{{\sigma }^{\prime }}_{v0}=49·{\left(Q_{t1}\right)}^{0.49}$	$R^2=0.291$
	$K_D=0.11+0.08·Q_{t1}$	$R^2=0.569$
All soils	$I_D=7.4-2.3·I_c$	$R^2=0.413$