Experimental Analysis on Dynamic Response of X-Section Piled Raft Composite Foundation under Cyclic Axial Load for Ballastless Track in Soft Soil

Table 1

Physical properties and parameters of geomaterials used.

Filling materials	γ (kN/m^3)	(%)	Dr (%)	Liquid limit (%)	Plastic limit (%)	Plastic index	Cu	Cc
Silty soil	18.6	27.8	—	31.0	24.1	6.9	2.76	1.71
AB granular	21.9	5.35	63	—	—	—	6	2.89
Gravel cushion	23.51	7.07	92	—	—	—	19.23	1.34
Supporting layer (sand)	19.43	25.5	69.5	—	—	—	2.42	0.93