Ground Subsidence Triggered by the Overexploitation of Aquifers Affecting Urban Sites: The Case of Athens Coastal Zone along Faliro Bay (Greece)

Table 3

Physical and mechanical properties of the Pleistocene fine-grained deposits [53–58].

	Clayey sand			Sandy clay
	Unified Soil Classification System (USCS) classification
	SM			CL, CH
	Min	Max	Av.	Min	Max	Av.
	Physical parameters
Liquid limit, LL (%)	20.1	34.2	27.5	23	43.2	30.6
Plasticity index, PI (%)	7.5	20	12.2	7.5	27.9	15
	Mechanical parameters
UC strength, qu (KN/m^2)	88	196	140	110	398	198
Initial void ratio, eo	0.33	0.45	0.40	0.39	0.71	0.49
Compression index, Cc	0.10	0.14	0.12	˗	˗	˗
	Standard Penetration Test (SPT)
NSPT	16	>50	˗	25	>50	˗
	Triaxial test (UU)
Cohesion, c (KN/m^2)	30	40	37	˗	˗	˗
Friction angle, (°)	7	24	17	˗	˗	˗