Integration of Multiband InSAR and Leveling Measurements for Analyzing the Surface Subsidence of Shield Tunneling at Beijing-Zhangzhou High-Speed Railway

Table 6

Average maximum subsidence velocity lag angle and lag distance parameters of longitudinal section.

Shield tunneling interval	Average advance impact angle (°)	Average leading influence distance(m)
c~b	64.3	8.75
b~a	60.1	14.73