A Multisource Monitoring Data Coupling Analysis Method for Stress States of Oil Pipelines under Permafrost Thawing Settlement Load

Figure 13

Trends of soil temperature with depth at different positions around the pipe. (a) Summer, L1 monitoring line. (b) Winter, L1 monitoring line. (c) Summer, L6 monitoring line. (d) Winter, L6 monitoring line.

(a)

(b)

(c)

(d)