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 2

The unequal data points are converted into the data points with equal time-interval for settlement of high fill subgrade in Xiangli Expressway [unit: mm].

Date	2017							2018
	6/19	7/20	8/24	9/25	10/26	11/25	12/24	1/21	2/24	3/25	4/26	5/27	6/25
Time interval		31	35	32	31	30	29	28	34	29	32	31	29
Original observation data		22.9	25.5	21.5	18.8	16	14.4	13.5	15.5	12.6	14.3	12.4	11.5
Data with equal time-interval		22.8	22.5	20.8	18.7	16.5	15.4	14.9	14.1	13.4	13.8	12.4	12.3