Study On Safety Of Buried Pipelines Under Landslide

China's economy is booming,and energy demand is gradually increasing in many places.Long-distance transportation is required after energy extraction.To save transportation costs and ensure the sustainability of energy supply,in addition to traditional transportation methods such as roads,railways,and waterways,long-distance pipeline transportation has now been widely developed.Pipelines for liquid transportation The efficiency has been recognized by society.The length of domestic pipelines is relatively large and spans many areas,so pipelines must pass through different geological conditions.There are various types of landforms,huge terrain height differences,complex geological environment,and abundant rainfall.Geological disasters will likely occur along buried pipelines,threatening the safe operation of pipelines.Huanjiang County is located in Guangxi.An oil and gas pipeline passes through the territory of Huanjiang County.Many geological disasters have occurred along buried pipelines.Especially during the rainy season,landslides and unstable slopes are more frequent.Landslides pose a great threat to buried pipelines,which can cause buried pipelines to break at any time and affect the safe operation of pipelines.Therefore,whether the buried pipelines in Huanjiang County area reach the limit of bearing capacity under the action of landslides,and the safe operation are important research contents.The research contents mainly include the following aspects:(1)Classify and summarize the geological hazards occurring along the buried pipelines in Huanjiang County.Landslides occur more frequently and have a greater impact on buried pipelines.The classification of the landslides that occurred has been summarized as the following numerical simulation model Establish a basis to provide simulation analysis.(2)The specific classification of landslides and the formation conditions of landslide disasters are elaborated,and the stress and deformation of buried pipelines are analyzed mechanically.The mechanical model of the pipeline is simplified to analyze the stress conditions of buried pipelines.The displacement and stress of the pipeline when the axial direction of the pipeline is perpendicular to the slide of the landslide are calculated through the thrust action of the soil above the pipeline and the weight of the buried pipeline itself.(3)FLAC3D finite element software is used to carry out simulation calculations to calculate the stress and deformation laws of the pipeline under different influencing factors.The stability and safety of buried pipelines under the action of landslides are analyzed fromthe factors of the width,thickness,gradient of the landslide area and the distance from the trailing edge of the landslide to the center of the pipeline.(4)Apply the analysis method in this article to the Gubingcun landslide in Huanjiang County to analyze and study the buried pipeline,simulate and calculate the stress and deformation curve of the pipeline,and analyze whether the pipeline has reached the ultimate bearing capacity under the action of the landslide.And to determine whether the pipeline that has shifted can still run safely.Based on the above research content,the impact of the horizontal landslide in Huanjiang County on buried pipelines and the safety of buried pipelines are analyzed.The study concludes that when the landslide occurred in Huanjiang County affected the pipeline laterally,the buried pipelines were in a relatively stable condition,and no yield failure occurred.