Thermal Effect on Structural Interaction between Energy Pile and Its Host Soil

Table 2

Thermal parameters of different layers of host soil and concrete.

	Thermal expansivity; (1/K)	Thermal conductivity coefficient, -direction (W/m/K)	Thermal conductivity coefficient, -direction (W/m/K)
Silty clay 1		1.36	1.28
Silty clay 2		1.36	1.28
Floury soil		1.14	1.06
Fine sand 2		0.98	1.02
Silty-fine sand		1.19	1.13
Silty clay 3		1.36	1.28
Fine sand 1		0.98	1.02
Silty clay 4		1.46	1.45
Concrete		1.28	1.28