A Novel Method for Analyzing the Factors Influencing Ground Settlement during Shield Tunnel Construction in Upper-Soft and Lower-Hard Fissured Rock Strata considering the Coupled Hydromechanical Properties

Table 4

Calculation error of the ANN.

Soft strata	Original data	Predicted data	Relative error	Average error	Maximum error
21	34.14	34.59	1.30%	2.31%	5.90%
22	34.58	34.62	0.12%
23	35.66	33.55	5.90%
24	34.83	35.84	2.88%
25	35.27	35.74	1.34%
Semisoft and semihard strata	Original data	Predicted data	Relative error	Average error	Maximum error
21	10.14	10.24	0.97%	1.63%	2.90%
22	10.30	10.25	0.50%
23	10.35	10.05	2.90%
24	10.47	10.27	1.91%
25	10.23	10.42	1.87%
Hard strata	Original data	Predicted data	Relative error	Average error	Maximum error
21	3.52	3.43	2.65%	5.43%	8.92%
22	3.53	3.64	2.98%
23	3.12	3.34	7.05%
24	3.74	3.40	8.92%
25	3.05	3.22	5.57%