Study On Feature And Prevention Of Geological Disasters In The River Gully Area Of Se-Ning-Lan Gas-transfer Pipelines

With the rapid development of oil and gas pipelines,during recent years,geological disasters,threats to pipelines' safety has increased.Several survey results showed that the threat to pipeline safety of geological disasters are mainly located in the rivers' valley region,the type of disasters including collapse,landslides,mudslides and brook road damaged.In this work,we took the river valley area of Seninglan gas pipeline as the research object.First,a detailed investigation and analysis of the pipeline storage environment was exhausted.We researched the basic characteristics of the river valley region and pipe laying methods(cross-cutting and parallel).The major geological disasters of pipeline type in the Seninglan river valley area are collapse,landslides,mudslides,brook road damage and slope damage.We summed up that the pipeline geological disasters development density in the study area gradually reduced from west to east,and that the degree of harm to the pipeline actually gradually showed an increasing trend.We further analysed the development and formation conditions of various types of pipes' geological disasters.Ultimately,we determined the level of the risk of the pipelines'geological hazards appeared to be normal distributed,and it was closely related to the laying of the conduit.So this research helped us to improve our understanding of geological disasters,then we can achieve the order that controlling the geological disasters of the pipeline on the whole.By researching and analyzing the current situation of different way of laying the "steady tube,solid tube,protection tube" to protect tubes in study area against geological disasters,and to identify the presence of repeated construction,the lacking of decision-making level and other problems in the process of protecting pipelines against geological disasters,we surveyed deeply into the reasons of problems appeared in designing and constructing.Then we found several problems such as lacking specification,shortage of information and so on.In the end,this paper engaged in the practice of investigation and estimate of pipelines'geological disaster and research results on the basis of researchers' progresses in recent years,we summarized the prevention and control of geological disasters in the study area's pipeline.