Research on Creep Characteristics and the Model of Artificial Frozen Soil

Table 6

Fitting parameters of the viscoelastic-plastic creep model.

T (°C)	Stress σ (MPa)	Model parameters
		E1 (MPa)	η1 (MPa·h)	η2 (MPa·h)	γ	η3 (MPa·h)	λ
−5	0.79	102.14	310.52	383.71	0.3095	115.265	3.586
	1.31	130.64	150.97	187.56	0.0231
	1.83	215.39	76.82	104.27	0.3880
−7	0.94	115.33	382.19	405.73	0.3765	238.376	2.156
	1.57	159.82	224.23	284.14	0.7759
	2.20	226.03	109.35	198.23	0.2333
−10	1.24	133.37	437.34	486.53	0.1307	303.926	4.238
	2.07	168.31	219.68	291.55	0.4245
	2.90	252.48	120.78	257.96	0.4726
−15	1.59	177.86	483.38	512.58	0.3048	391.361	7.819
	2.65	217.71	274.85	308.14	0.5055
	3.70	256.72	163.86	269.86	0.1390