EFFECTS OF OIL AND PIPELINE LAYING IN DIFFERENT ANGLES AT LOESS SLOPE AND EVALUATION METHODS

In recent years, with the development of storage and transportation of hydrocarbon technology. The pipeline has been laid successfully in a variety of complex geomorphology areas and a variety of special geographical environment. But in some special pipe section, such as Collapsible-Loess Area and Mountain-Landslide Area, oil and gas pipeline is restricted by some factors. Even there will be found a variety of problems in the course of laying or operating. In the paper, we will based on mechanical analysis and calculation, and established mechanics model, combined with the similarity simulation experiment, analysis the effect of water flow on oil and gas pipeline where laid at different angles in slope, and referenced the theory and method of pipeline risk-assessment of foreign countries. The risk assessment method of special pipeline section is established in loess area. The result has reference value and guidance significance to the pipeline laying in the loess area.