An Investigation into the Tunnel-Soil-Pipeline Interaction by In Situ Measured Settlements of the Pipelines

Figure 2

Main construction steps of the PBA method: (a) step 1; (b) step 2; (c) step 3; (d) step 4; (e) step 5; (f) step 6.

(a)

(b)

(c)

(d)

(e)

(f)