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

Table 6

ZL2-7 actual value and model fitting value.

Period	Actual value	BP network		PSO-BP network
		Fitting value	Relative error (%)	Fitting value	Relative error (%)
1	1091.74	1094.02	−0.21	1096.139	−0.40
2	1227.01	1221.387	0.46	1226.61	0.03
3	1343.88	1351.156	−0.54	1345.639	−0.13
4	1578.08	1567.732	0.65	1576.096	0.12
5	1757.89	1770.027	−0.69	1760.421	−0.14
6	1822.97	1810.918	0.66	1821.395	0.08
7	1828.44	1833.811	−0.29	1828.591	−0.01
8	1908.81	1926.841	−0.94	1908.798	0
9	2061.54	2014.674	2.27	2061.533	0
10	2025.6	2070.983	−2.24	2025.602	0
11	2151.51	2130.434	0.98	2151.51	0
12	2221.34	2225.197	−0.17	2221.34	0