Research Article

Influence of Backfill Compaction on Mechanical Characteristics of High-Density Polyethylene Double-Wall Corrugated Pipelines

Figure 25

(a) Location of loose backfill; the circumference strain nephogram of the (b) interior wall and (c) exterior wall when the left side of Lay 01 and the right side of Lay 02 were loose.
(a)
(b)
(c)