Abstract：For buried high temperature subsea pipelines, if the axial movements are restrained, large axial compressive forces will occur and these compressive forces will cause upward buckling (UHB), namely the upheaval buckling. After pipeline buckling occurs, there will be two possible consequences： strength failure, or other type of failure resulting from the deviation from design conditions since the buried pipeline comes out of the seabed. Recently, more and more offshore marginal fields are developed, the transporting temperature rises, and the pipeline design temperature rises accordingly, so the UHB will be probably a critical case. Aiming at this problem, three methods for UHB analysis are presented and the applicable scope is discussed.
1 Hobbs R E. Inservice buckling of heated pipelines ［J］. Journal of Transportation Engineering, 1984, 110(2)： 175.
2 Pedersen P T, Jensen J J. Upheaval creep of buried pipelines with initial imperfections［J］. Marine Structures, 1988, 1(1)： 11.
3 Nielsen N J R, Pedersen P T, Grundy A K, et al. Design criteria for upheaval creep of buried sub-sea pipelines ［J］. Journal of Offshore Mechanics and Arctic Engineering-Transactions of the ASME, 1990，112： 290.
4 Hobb R E, Liang F. Thermal buckling of pipelines close to restraints ［R］. Eighth International Conference on Offshore Mechanics and Arctic Engineering, 1989.
5 Palmer A. Design of submarine pipelines against upheaval buckling ［R］. OTC, 1990.
6 Pedersen P T, Michelsen J. Large deflection upheaval buckling of marine pipelines ［C］. Proceedings of Behaviour of Offshore Structures (BOSS), 1988.
