Study On The Deformation Characteristics Of Buried Pipelines Under Traffic Load

With the rapid development of urbanization,the application of buried pipelines is more and more widely.Due to the limitation of geographical location and the actual project,most of the pipelines are buried underground.The buried pipeline is not only affected by the overlying soil loads,but also by the traffic loads,the load son the road surface and the internal fluid impact force.Under the action,the pipeline is easy to produce the vertical and horizontal bending deformation,additional bending stress will make the pipeline damaged and lead to leakage or explosion of the pipe in a weak position.Long pipeline in practical engineering is composed of many short pipes,and the pipe joints are the most easily damaged parts.Through the study on the deformation characteristics of section stress of pipelines under traffic loads,the different factors influencing the stress and deformation of the pipe section is found out.Through the research,some conclusions which are propitious to the design,construction and protection measures of buried pipeline can be obtained,including:1?The buried pipelines of the current situation and future development trends in our country are analyzed,and the harm of traffic load on the pipeline is discussed.Through a systematic summary of the current domestic and foreign scholars research on the buried pipelines,it is found that there is little research on the damage of buried pipeline joints,so the related research is necessary.2?Make a discuss respectively on the traffic load model and pipeline model,soil model,pipe soil interaction model of the buried pipeline,select a more reasonable model,explain its rationality,and provide theoretical basis for establishing a correct finite element model.3?Using ABAQUS finite element simulation software to calculate the response of buried pipeline under concentrated static load and impact load.The effect of static load and impact load magnitude,location,soil modulus and pipeline depth of four different factors on the mechanical characteristics are studied(??????),and the section stress and deformation regular pattern under different conditions of thewhole pipeline and pipeline are found out.4 ? Through the analysis and research on Zhengzhou urban sewage pipeline inspection project and the Guangzhou urban water supply network management section plugging project of,the most easily damaged position of the pipeline in practical engineering pipe section is verified.According to pipe damage,this paper put forward a new measure to protect the pipe.