Effect of Subway Excavation with Different Support Pressures on Existing Utility Tunnel in Xi’an Loess

Figure 12

Relative position of the shield machine and utility tunnel at the selected moment of monitoring. (a) Left lane to 15th ring. (b) Left lane to 30th ring. (c) Left lane to 45th ring. (d) Right lane to 15th ring. (e) Right lane to 30th ring. (f) Right lane to 45th ring.

(a)

(b)

(c)

(d)

(e)

(f)