Research on Deformation Prediction of Foundation Pit Based on PSO-GM-BP Model

Table 10

Actual and simulated results of B16.

Period	Actual value	GM (1, 1)		PSO-GM (1, 1)
		Fitting value	Relative error (%)	Fitting value	Relative error (%)
1	21.66	21.6600	0.00	21.1069	2.55
2	23.30	22.8930	1.75	22.6821	2.65
3	23.90	23.6234	1.16	23.4549	1.86
4	23.25	24.3771	4.85	24.2521	4.32
5	24.50	25.1548	2.67	25.0804	2.37
6	25.31	25.9574	2.56	25.9350	2.47
7	27.95	26.7856	4.17	26.8186	4.05
8	29.04	27.6402	4.82	27.7323	4.50
9	28.23	28.5220	1.03	28.6772	1.58
10	29.44	29.4320	0.03	29.6543	0.73
11	30.38	30.3711	0.03	30.6646	0.94
12	30.81	31.3400	1.72	31.7094	2.92
13	31.23	32.3399	3.55	31.9099	2.18
14	31.92	32.9946	3.37	32.5515	1.98
15	32.44	33.6142	3.62	33.1876	2.3