Experimental Study And Numerical Analysis On Influence Of Urban Buried Pipelines Under The Foundation Collapse

In all transport energy facilities, the pipeline is recognized as the most economical and safest method of transport energy in the world, especially in urban construction. It has become an integral part of the normal operation of city. But often due to foundation collapse, the venue uneven settlement and other reasons, it results in the destruction of the buried pipelines. While, the buried pipelines in the infrastructure of the city occupies an important position, so it is essential to analyze the stress, strain and damage of the city buried pipelines under the action of foundation collapse. In this paper, in order to study and analyze the city buried pipelines, it compares numerical simulation analysis method to testing method, hoping to provide a new analytical approach for the prediction and prevention of the consequences of the collapse of the foundation.The content of this paper includes the theoretical knowledge of buried pipeline damage and foundation collapse, pipe-soil constitutive relations as well as the research methods of buried pipelines, building the pipe-soil model by ANSYS finite element analysis software, it analyzes the variation of strain and displacement under the pipeline deformation. And then through the buried pipelines’ test in large geotextile tank, it simulates the realistic foundation collapse on buried pipeline and draws the basic law of displacement and strain of pipelines. Comparative analysis of finite element simulation results and experimental data revealed that the pipeline displacement and strain results with the experimental data are in good agreement, the consequences of the foundation collapse provides an approach between the prediction and prevention.