Research On Mechanical Shape Of Buried Pipeline Under Traffic Load

With the rapid development of cities,most of the cities in our country are developing outwards,and there are quite a number of small towns which are developing outwards.Therefore,there are many township roads,remote roads,that have to be changed to urban roads.This road renovation construction will cause the previous old buried pipes to be misplaced,broken,sinking,etc.Municipal drainage systems as infrastructure,guarantee the normal operation of the city.In order to play its normal drainage function,its safety and reliability must be guaranteed.Therefore,in the process of road reconstruction,attention should be paid to the structure of the road surface after reconstruction and whether the load on the road will affect the pipes.Once the pipes under the reconstructed road are damaged,it will be quite difficult to inspect and repair them,which will bring inconvenience for the residents and unnecessary waste of resources.In this paper,based on a road reconstruction project in Hatjiang District of Wuhu City,the buried pipeline is taken as the research object.By studying the existing calculation methods and load models,ABAQUS finite element software and its subroutines are used to simulate the mechanical response of buried pipelines under different road surfaces with traffic loads,and based on their vertical displacements and stress magnitudes,the general rules of buried pipelines under the action of vehicle loads are derived.The study will provide some valuable references for engineering applications.The details of the study are as follows:(1)This paper mainly takes reinforced concrete pipes as the research object,and discusses some soil pressure calculation theories,traffic load models,pipe models,soft soil models and models of pipe and soil interaction in the study of buried pipes respectively,and selects a more reasonable model to provide a theoretical basis for the correct establishment of finite element models later.(2)Through a brief introduction of the engineering background on which the article is based,three different pavement construction schemes are proposed through field survey work,and the corresponding buried pipeline models are established using ABAQUS finite element software and its sub-programs,and the vertical displacement and stress patterns of the pipeline are calculated and analysed for three different pavements under the action of concentrated static load and traffic load,with different burial depths,pipe diameters,soil elastic modulus,static load on the upper part of the pavement,vehicle wheel pressure and vehicle speed.(3)According to the calculation and analysis of the general law of buried pipelines under traffic load,combined with the actual needs of the project,the corresponding pipeline protection measures as well as road and foundation treatment measures were proposed,and it was concluded that a buried pipeline depth of 2.5m and a pipeline diameter of 600-800 mm is a more reasonable design for deformation protection during the construction of the project.Figure [108] Table [4] Reference [62]...