Shear Strength Deterioration of Compacted Residual Soils under a Wind Turbine due to Drying-Wetting Cycles and Vibrations

Table 1

Physical properties of the soil and bedrocks.

No.	Stratum	Thickness, t (m)	Natural density, ρ (g/cm^3)	Optimum water content, wopt (%)	Maximum dry density, ρdmax (g/cm^3)
1	Residual soil	5.1–8.2	1.71	12.55	1.86
2	Strongly weathered sandstone	4.2–6.8	2.45	—	—
3	Moderately weathered sandstone	>16.7	2.55	—	—