Deformation Prediction of a Deep Foundation Pit Based on the Combination Model of Wavelet Transform and Gray BP Neural Network

Table 5

Test for fitting value and predicted value of horizontal displacement of pile top (mm).

Measured period	Measured displacement	Fitting value	Residual	Relative error	Average error
1	0.64	0.64	0	0
2	1.25	1.26	−0.01	0.87%
3	1.84	1.90	−0.06	3.25%
4	2.36	2.42	−0.57	2.43%
5	2.65	2.45	0.2	7.68%
6	3.83	3.92	−0.09	2.38%
7	4.67	4.47	0.02	0.45%
8	5.38	5.58	−0.02	3.64%
Forecast value inspection form
Measured period	Measured displacement	Fitting value	Residual	Relative error	Average error (%)
9	6.45	6.79	−0.34	5.27%	8.17
10	6.67	7.02	−0.35	5.24%
11	6.78	7.39	−0.58	8.53%
12	6.87	7.81	−0.94	13.62%