Field Test Investigation of the Pile Jacking Performance for Prefabricated Square Rigid-Drainage Piles in Saturated Silt Sandy Soils

Table 1

Parameters of soil layers.

Layer	Soil type	Natural moisture content (%)	Unit weight (kN/m^3)	Void ratio	Saturation (%)	Liquid limit (%)	Plastic limit (%)	Compression modulus (MPa)	Cohesion (kPa)	Friction angle (°)
1	Plain fill
2	Silty clay	30.9	18.69	0.867	97	32.6	22.6	6.94	22.1	21.4
3	Muddy silt	35.6	17.90	1.015	95	32.6	23.8	6.71	18.4	24
4	Muddy silt	36.0	17.82	1.032	95	32.5	24.2	6.97	16.6	27.6
4-1	Silt	33.1	18.10	0.955	94	32.3	24.2	6.71	16.9	25.9
5	Silty clay	32.7	18.15	0.946	93	34.5	22.1	4.92	22.6	13.1
6	Silty clay	23.8	19.63	0.683	95	31.9	18.8	7.65	43.6	15.2
7	Silty sand	22.9	19.98	0.646	96	35.0	20.5	10.96	79.4	18.3
7-1	Silty sand	26.5	18.99	0.764	93	30.7	22.0	9.27	2.6	28.8