Research on the Grey Verhulst Model Based on Particle Swarm Optimization and Markov Chain to Predict the Settlement of High Fill Subgrade in Xiangli Expressway

Table 4

The comparison table of different prognostic models for settlement of high fill subgrade in Xiangli Expressway [unit: mm].

Year	Month		GM(1,1)	PSOMGM(1,1)	ARIMA	GVM	MGVM	PSOMGVM
2017	Jul.	22.90	/	/	/	/	/	/
	Aug.	25.50	24.29	24.80	/	23.86	24.51	24.49
	Sept.	21.50	20.95	21.39	22.10	20.75	21.31	21.29
	Oct.	18.80	18.93	18.01	19.72	18.93	18.56	18.73
	Nov.	16.00	17.05	16.22	17.14	17.24	16.10	16.21
	Dec.	14.40	15.30	14.56	14.70	15.66	14.63	14.73
2018	Jan.	13.50	13.67	13.01	12.69	14.19	13.26	13.35
	Feb.	15.50	15.51	15.83	14.39	16.34	15.26	15.37
	Mar.	12.60	12.37	12.63	12.12	13.24	12.37	12.46
	Apr.	14.30	12.76	13.77	14.00	13.89	14.27	14.26
2018	May	12.40	11.53	12.44	14.82	12.13	12.35	12.45
	Jun.	11.50	10.00	10.79	15.38	10.74	10.93	11.02