HONG Zhaohui, YAN Yue, FU Dengfeng, et al. Analytical solution for predicting pipeline walking considering axial soil resistance increment[J]. 2020, 52(2): 10-16.
DOI:
HONG Zhaohui, YAN Yue, FU Dengfeng, et al. Analytical solution for predicting pipeline walking considering axial soil resistance increment[J]. 2020, 52(2): 10-16.DOI: 10.11918/201811059.
Deep-water pipeline system is an important structure that transports oil and gas in offshore engineering. To ensure the fluidity of oil
pipelines are usually applied with high temperature during operation. The asymmetric expansion and shrink can make the pipeline move axially and globally toward one direction. The phenomenon is called pipeline walking
which is a severe challenge for the safety of pipeline systems. The working period of pipeline lasts for a long time
starting from heating up and ending in cooling down. Therefore
the soil resistance on pipeline in the cooling down process may be larger than that in the heating process due to soil consolidation
and the soil resistance of the overall working period is not a constant value. Through theoretical analysis
the effective axial force along the pipeline considering soil resistance increment within one loading cycle was investigated
and a walking-rate prediction method was proposed. In addition
an engineering case was analyzed based on the obtained analytical solution.