Three-dimensional Information System Construction And Security Research Of Gas Pipe Network

Gas network as the most important part of urban lifeline project,a special dangerous industry,its running state security risk or not will be directly involved and danger to the normal operation of the city and people’s normal life;The general public’s life and property security,to gas network security problem becomes more and more important.At present,thus ensuring the sound operation of the gas pipe network,stable social environment has become a development the top priority of economic and social significance of fuel gas undertakings.In this paper,based on the basis of the gas pipeline engineering related data collection,carried out a research into the following:1、Based on network in three dimensional space data pipeline position,shape,size and the texture attribute data,materials and other information,and then on the basis of network locates the geographical position,tube and pipe section points,ancillary facilities of three-dimensional space coordinates and the spatial topological relations and network attribute data etc.,made a pipe network structure of three-dimensional data information display system.2.From the engineering construction of excavation disturbance,additional load and pipe network is affected by the corrosion of three main factors influencing network security operation evaluation,and to take according to the experimental data of a certain defects in residual strength assessment of gas pipeline,the combining strength criterion,it is concluded that gas pipeline is established under the condition of a certain size defects of pipeline corrosion residual strength evaluation method formula,this formula is applicable to a given defect,this formula can be used to for the safety evaluation of gas pipeline projects to provide some reference and valuable for theoretical data.3.This paper collected based on the historical data of gas pipeline accident information,and from the soil corrosion,building subsidence,third-party damage,incorrect operation,design factors,the influence of accident consequence,six factors,on the basis of network security integrated fuzzy evaluation.Firstly,according to relevant data to determine the factors that affect and established risk factors set,and then according to the interaction relationship between the influencing factors of and factors affecting the weight set of grade,;Again according to the laws of the membership function curve to determine the building overall level and setting up the weight assembly of overall risk factors evaluation matrix,and finally use fuzzy comprehensive evaluation is applied to risk evaluation index,the fuzzy mathematics comprehensive evaluation was carried out on the network security,eventually determine the pipeline risk level,and provide scientific basis for gas pipe network security.