Soil Fatigue from Induced Seismicity

Table 2

Test results from equivalent cyclic and impulse loading [4].

Specimen	Test program	Initial water content (%)	Posttest water content				Number of cycles to 2.5% εa
			Top (%)	Middle (%)	Bottom (%)	Average (%)
SP200-I-1	Impulse	5.53	4.20	6.24	7.63	6.02	13
SP200-I-2	Impulse	5.51	4.87	5.89	6.83	5.86	11
SP200-I-3	Impulse	5.55	4.77	5.77	7.77	6.10	16
SP200-I-4	Impulse	5.54	4.69	5.85	9.07	6.54	14
SP200-I-5	Impulse	5.56	4.75	5.85	6.92	5.84	11
SP200-I-6	Impulse	5.55	4.37	5.25	7.87	5.83	15
SP200-I-7	Impulse	5.37	4.95	5.89	7.49	6.11	16
SP200-I-8	Impulse	5.59	4.36	5.33	7.25	5.65	9
SP200-I-9	Impulse	5.55	4.86	5.63	7.99	6.16	10
SP200-I-10	Impulse	5.58	4.41	6.56	8.15	6.37	11
Average	Impulse	5.53	4.62	5.83	7.70	6.05	12
SP200-C-1	Cyclic	5.53	4.91	6.17	6.87	5.98	96
SP200-C-2	Cyclic	5.71	4.14	5.62	7.05	5.60	n/a
SP200-C-3	Cyclic	5.68	4.59	6.19	7.50	6.09	n/a
SP200-C-4	Cyclic	5.48	4.47	5.77	6.87	5.70	n/a
SP200-C-5	Cyclic	5.59	5.54	8.04	9.40	7.66	n/a
SP200-C-6	Cyclic	5.59	4.65	5.17	6.25	5.36	n/a
SP200-C-7	Cyclic	5.58	4.52	5.51	7.35	5.79	n/a
SP200-C-8	Cyclic	5.54	4.38	5.89	7.03	5.77	n/a
SP200-C-9	Cyclic	5.57	4.60	5.07	7.04	5.57	74
SP200-C-10	Cyclic	5.53	4.63	4.89	7.29	5.60	63
Average	Cyclic	5.58	4.64	5.83	7.27	5.91	n/a