Analysis and Prediction of Subway Tunnel Surface Subsidence Based on Internet of Things Monitoring and BP Neural Network

Table 4

Surface settlement of each part of Section 3 during excavation.

Distance from midline	Middle hole excavation settlement	Excavation settlement of left and right side holes	Total settlement	Middle cave settlement/total settlement	Side tunnel settlement/total settlement
−25.8	0	−0.44	−0.44	0.0	100.0
−20.8	−0.34	−1.27	−1.61	21.1	78.9
−15.8	−1.27	−2.61	−3.88	32.7	67.3
−10.8	−2.16	−5.32	−7.48	28.9	71.1
−5.8	−4.46	−8.56	−13.02	34.3	65.7
−3.8	−7.53	−10.82	−18.35	41.0	59.0
−1.8	−9.88	−10.58	−20.46	48.3	51.7
1.8	−10.35	−10.26	−20.61	50.2	49.8
3.8	−9.26	−11.01	−20.27	45.7	54.3
5.8	−5.12	−10.64	−15.76	32.5	67.5
10.8	−2.09	−6.02	−8.11	25.8	74.2
15.8	−0.94	−3.11	−4.05	23.2	76.8
20.8	−0.21	−1.49	−1.7	12.4	87.6
25.8	0	−0.57	−0.57	0	100.0