A Nonlinear Optimization Technique of Tunnel Construction Based on DE and LSSVM

Table 1

Orthogonal scheme and calculated displacements.

Factor	𝐸1  (MPa)	𝑢1	𝐸2  (GPa)	𝑢2	AZ  (mm)	DZ  (mm)	AB  (mm)	BC  (mm)
1	20	0.27	0.2	0.23	70.05	7.137	67.78	10.795
2	20	0.29	0.4	0.25	69.50	3.541	66.74	10.050
3	20	0.31	0.6	0.27	69.18	2.341	66.13	10.230
4	20	0.33	0.8	0.29	68.91	1.740	65.54	10.806
5	20	0.35	1.0	0.31	68.65	1.377	64.92	11.537
6	40	0.27	0.4	0.27	38.30	3.498	36.94	5.596
7	40	0.29	0.6	0.29	38.07	2.312	36.52	5.503
8	40	0.31	0.8	0.31	37.91	1.715	36.22	5.614
9	40	0.33	1.0	0.23	37.72	1.408	36.00	5.675
10	40	0.35	0.2	0.25	38.48	6.985	36.73	8.816
11	60	0.27	0.6	0.31	26.73	2.288	25.75	3.839
12	60	0.29	0.8	0.23	26.55	1.763	25.48	3.641
13	60	0.31	1.0	0.25	26.45	1.398	25.27	3.785
14	60	0.33	0.2	0.27	27.30	6.941	26.23	6.554
15	60	0.35	0.4	0.29	26.68	3.438	25.36	5.531
16	80	0.27	0.8	0.25	20.58	1.752	19.83	2.745
17	80	0.29	1.0	0.27	20.49	1.390	19.66	2.836
18	80	0.31	0.2	0.29	21.43	6.898	20.71	5.392
19	80	0.33	0.4	0.31	20.79	3.412	19.85	4.382
20	80	0.35	0.6	0.23	20.47	2.333	19.44	3.832
21	100	0.27	1.0	0.29	16.79	1.381	16.17	2.261
22	100	0.29	0.2	0.31	17.79	6.846	17.28	4.763
23	100	0.31	0.4	0.23	17.05	3.508	16.36	3.295
24	100	0.33	0.6	0.25	16.82	2.321	16.04	3.122
25	100	0.35	0.8	0.27	16.67	1.726	15.83	3.095