A Case Study of Tunnel Reinforcement Measure during Traffic Upgrading in Chongqing City, China

Figure 1

Tunnel information: (a) tunnel location, (b) tunnel typical cross-section (unit: mm), (c) infrastructure over the tunnel, (d) tunnel portal facing Songshuqiao Overpass, and (e) the completed Yu’ao road overpass.

(a)

(b)

(c)

(d)

(e)