Safety Assessment Of Natural Gas Pipelines Under Landslide Geological Disasters In The Northeastern Sichuan Basin

Each region of the Chuan Yu is complicated, which makes the geological disasters occur in there frequently including landslide geological disasters. Wenchuan earthquake caused each regional geological osteoporosis, raining more, and that the landslide is more likely to occur.According to the statistical results of oil and gas geological disasters in recent years,the landslide made up more than 95% of the overall geological disaster.Northeast sichuan is located in the mountainous area, the area topography is complex and volatile, and most of the pipelines in the diggings crossing area are larger, so the problem of gas pipeline's safe is focused on.Under the condition of geological disasters in the northeast of sichuan, we make a study of the gas pipeline safe operation.In this paper, we study the reason and the condition and the characteristics of the pipeline's landslide.the study make the Comprehensive analysis of the failure mechanism that the landslide affects the safe operation of the pipeline, and establish the system of typical landslide geological disasters in natural. Based on the landslide under natural gas pipeline safety factors system, the study shows the different stress state of natural gas buried pipeline, and the different landslide disaster (including the lateral and longitudinal landslide, complex landslide). The mechanical behavior of mechanics calculation model are proposed. According to natural gas pipeline geological disaster's risk classification and index system, under risk and safety assessment system we constructs the east sichuan gas pipeline the geological's action in the north minery and gives the landslide under the condition of landslide geological disasters risk assessment model. Based on the above safety assessment system and risk assessment model,we specifically write for landslide area of natural gas pipeline safety assessment software, Using the software's of the safety to assess the various safety the the north minery of east sichuan gas pipeline under the landslide geological disasters of. And it is concluded that the area of each index of natural gas pipeline risk assessment results.which determines whether there is a potential danger.Based on the results of thenorth minery of east sichuan gas pipeline risk assessment and the particularity of its regional, we studied of landslide monitoring technology and method of pipeline.We focus on the monitoring method of landslide displacement.According to the actual situation of east sichuan gas pipeline in the north minery,this method is recommended to use.The study make the monitoring period of gas pipelines and assessment Monitoring of risk of the landslide in east sichuan north minery.According to the research of east sichuan gas pipeline, we make the safety evaluation and risk monitoring and evaluation under the condition of landslide disaster in the north minery and come up with the warning and prevention methods of the natural gas pipeline in the landslide.