Table 3 Data set of longitudinal measuring points.

From: Prediction method of surface settlement of rectangular pipe jacking tunnel based on improved PSO-BP neural network

Right portrait

Left portrait

Distance from centerline/m

Sedimentation value/mm

Distance from centerline/m

Sedimentation value/mm

21.55

2

21.55

− 3

11.15

3

11.15

1

0.75

2

0.75

− 5

− 11.5

1.8

− 0.75

3

–

–

− 11.15

6

–

–

− 21.55

8.2

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