The Influence Mechanism of In Situ Stress State on the Stability of Deep-Buried-Curved Tunnel in Qinghai-Tibet Plateau and Its Adjacent Region

Figure 13

Response surface of the tunnel in key positions. (a) Roof. (b) Floor. (c) Spandrel. (d) Corner. (e) Sidewall.

(a)

(b)

(c)

(d)

(e)