Research On The Influence And Control Of Uneven Settlement On Assembled Comprehensive Pipe Corridor

Nowadays,in many emerging cities in China,in view of the limitations of economic development at that time,some basic municipal facilities(including pipelines,pipelines,etc.)were laid in the shallow underground soil layer of roads.With the economic development,the expansion of pipelines and pipelines not only The phenomenon of "road zipper" caused many accidents,which seriously affected the city’s appearance and safe development.Therefore,the development of urban comprehensive pipeline corridors is the mainstream trend of the intensive and sustainable development of municipal public pipelines.It is to solve the problem of "road zipper",improve the economical use of urban space,and is an important infrastructure to ensure urban development.However,the uneven settlement of the assembled integrated pipe corridor will greatly reduce the performance of the pipe corridor,so the study of the influence and control of the uneven settlement on the assembled integrated pipe corridor is an important content to be considered in this article.In this paper,the method of theoretical analysis and numerical simulation will be used to study the response mechanism of the assembled comprehensive pipe corridor structure under uneven settlement.The work and corresponding main results are as follows:(1)On the basis of reading a large number of documents,this article first summarizes the possible settlement of the pipe corridor,and analyzes the main causes of the settlement of the underground comprehensive pipe corridor.Then,the feasibility theory analysis of the longitudinal settlement of the assembled pipe corridor under the uneven formation was carried out.Taking into account the difference in the properties of the underlying soil layer,the pipe corridor—infinite beam model of uneven soil and the pipe corridor—uneven The finite length beam model of soil is solved by the superposition method or the initial parameter method.Taking the pipe corridor under a single concentrated load as an example,the deformation and internal force of the assembled pipe corridor under a single load are analyzed and plotted.The general changes of the deflection W,rotation angle θ,bending moment M and shear force Q on any section of the pipe corridor.(2)Settlement of pipe corridor under the action of load-soil.Firstly,the finite element model was established by using ABAQUS numerical simulation software,and several typical settlement types of assembled pipe corridors were numerically simulated and their damages were roughly analyzed.Then the stress on the surface of the pipe corridor is analyzed,and the stress and displacement changes of the pipe corridor structure are specifically analyzed,and the settlement caused by the nature of the underlying soil layer under the pipe corridor is analyzed to reveal the change of the soil elastic modulus.The effect on the longitudinal deformation of the pipe corridor.And by analyzing the settlement of the pipe corridor,specific prevention measures are given.(3)Aiming at several common pipe corridor settlements during the construction of the project,the representative slow-down assembling pipe corridor settlement is selected as an example,and the finite element analysis of the assembled waterproofing of the pipe corridor sections is carried out.The size of the prestress required for the interface stress specified in the code and the distribution law of the interface stress of the waterproof rubber are displayed,and then the relationship between the segment settlement and the tensile control force and the relationship between the overall settlement of the pipe corridor and the tensile control force are fitted To formulate effective guidelines for the settlement of assembled single-cabin pipe corridors,and provide early warning values for the maximum settlement of pipe corridors,and then provide a reference for the practical application of the project.