Comparative Study on Grouting Protection Schemes for Shield Tunneling to Adjacent Viaduct Piles

Figure 4

Grouting reinforcement scheme: (a) grouting to the top of the tunnel; (b) grouting to the bottom of the tunnel; (c) grouting to 3 m below the bottom of the tunnel; (d) grouting to 6 m below the bottom of the tunnel.

(a)

(b)

(c)

(d)