Research Article

Stability Analysis of TBM Tunnel Undercrossing Existing High-Speed Railway Tunnel: A Case Study from Yangtaishan Tunnel of Shenzhen Metro Line 6

Figure 1

Direction of Shenzhen Metro Line 6 and section of the existing tunnel. (a) Shenzhen Metro Line 6 and the tunnel underpass section. (b) Cross section of the existing tunnel. Notes: ① center line of the railway; ② center line of the tunnel; r = 6.65 m; θ = 108.67°.
(a)
(b)