Field Tests and Simplified Calculation Method for Static Drill Rooted Nodular Pile

Table 2

Parameters of physical dimensions and drilling rate for the tested piles.

Tested pile	Pile length (m)	Pile diameter (mm)	Maximum of applied pile load (kN)	Pile head settlement (mm)	Rebounded pile head displacement (mm)	Residual settlement (mm)	Rebounded rate (%)
S-1	55	600 (650–500)	10000	73.49	46.53	26.96	63.3
S-2	55	600 (650–500)	8000	81.88	55.72	26.16	68.1
S-3	55	600 (650–500)	9600	24.01	21.51	2.50	89.6
Drilling rate (m/min)			Thickness of soil layers in process of drilling construction (m)
			0–20	20–42	42–47	47–52	52–55
Tested piles	S-1		0.92	0.78	0.10	1.41	0.60
	S-2		0.99	0.61	0.29	1.60	1.45
	S-3		0.61	1.22	0.13	1.50	0.61