Stress analysis method for the large excavation of a river-crossing oil pipeline - A case study of Baiyang river oil pipeline

The primary cause of pipeline failure for the river-crossing oil pipeline is the accumulation of stress. in order to ensure that the pipeline is safe,a stress analysis under operating conditions is necessary. in this study,a numerical simulation of the baiyang river oil pipeline with a large excavation using the finite element stress analysis software caesar ii in which the pipeline's stress distribution is analyzed. through the engineering case study,it is concluded that: (1) the inclined degree should be set at less than 35 in order to ensure pipeline safety; (2) the most vulnerable location is located at the entrance,so the area should be carefully calibrated,especially at the first saddle weight; (3) in order to ensure pipeline safety,the first saddle weight between the bend and saddle weight is 4 m; (4) based on the analysis of limit length,the excavation depth is normally controlled in the allowable extent. © 2017,university of kuwait. all rights reserved.