Experimental Study on the Pile-Soil Synergistic Mechanism of Composite Foundation with Rigid Long and Short Piles

Table 1

Physical parameters of the sand sample.

D (mm)	ρ (g/cm^3)	Dr	φ (°)	c (kPa)
0	1.613	0.38
400	1.614	0.38
700	1.622	0.41	33.42	6.4
1000	1.634	0.45
Average	1.621	0.41