Research Article

Experimental Study on Thermal Insulation Effect of the Buried Oil-Gas Pipelines in Permafrost Regions

Figure 2

Damage types of the buried oil-gas pipelines: (a, b) photoed at Laji mountain of the Sebei-Xining-Lanzhou buried gas pipeline in July 2016, (c) photoed at the Norman Wells Oil Pipeline in September 1997 [28], and (d) photoed at Wuli in June 2002 [8].
(a) Pipeline trench subsidence
(b) Pipeline trench thaw slumping
(c) Pipeline lateral buckling
(d) Pipeline uplift deformation