Advances in Civil Engineering / 2018 / Article / Tab 2

Research Article

Experimental and Numerical Study on the Behavior of Energy Piles Subjected to Thermal Cycles

Table 2

Material parameters of the sands.

Yangzhou sand (test sand)Loose Sacramento River sandDense Sacramento River sand

Thermal parametersDry density, ()149014501670
Thermal conductivity of soil particle, ()2.42.42.4
Specific heat of soil particle, ()930930930
Linear thermal expansion coefficient of soil particle, ()10.010.010.0

MC modelElastic modulus, ()3.34
Poisson’s ratio, 0.3
Cohesion, ()0
Friction angle, ()30.6
Dilation angle, ()0.0

BS modelInitial void ratio, 0.780.870.61
Elastic swelling modulus, 0.010.010.0075
Poisson’s ratio, 0.30.20.2
Critical void ratio at 100 kPa, 0.600.970.84
Slope of the critical state line, 0.120.0760.076
Ellipse aspect ratio, 2.02.21.65
Residual friction angle in compression, ()30.634.636.2
Residual friction angle in tension, ()30.634.636.2
Peak friction angle, ()32.035.743.8
Plastic modulus, 1.02.02.0
Elastic modulus at 100 kPa, ()12.018.721.5

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