燃气管网三维信息化体系构建及其安全性的研究

发布时间：2018-10-30 12:03

【摘要】：燃气管网作为城市生命工程中最重要组成部分,其运行状态安全与否直接涉及城市的正常运转与市民的正常生活;因此燃气管网安全运营具有重要经济与社会意义。本论文基于燃气管道工程的基础数据,进行了如下内容研究:1、基于管网三维空间数据中的管道位置、形状、体积以及属性数据中的纹理、材质等信息,再依据管网所处地理位置与管段、管点、附属设施点的三维空间坐标和其空间拓扑关系及管网属性数据等,构建了管网三维数据信息显示系统。2、从工程建设的开挖扰动、路面附加荷载作用、管网所受腐蚀影响等因素进行管网安全性评价,根据实验数据对存在一定缺陷的燃气管道进行剩余强度评价,再结合强度准则,建立了燃气管道在一定尺寸缺陷情况下管道腐蚀剩余强度评价的理论方法,从而为燃气管道工程的安全性评价提供了理论性支撑。3、基于燃气管网事故的历史数据信息,以土壤腐蚀、建筑物沉降、第三方破坏、误操作、设计因素、事故后果的影响六个因素为基础,建立了风险影响因素集,然后根据影响因素之间的相互作用关系求出影响因素等级权重集;再根据隶属度函数曲线规律构建整体等级评价矩阵和整体风险影响因素权重集,最后应用模糊综合评价求出风险评价指标,并对管网进行安全性模糊数学综合评价,确定管网风险等级,为燃气管网安全性提供科学依据。
[Abstract]:As the most important part of urban life engineering, the safe operation of gas pipeline network is directly related to the normal operation of the city and the normal life of the citizens; therefore, the safe operation of the gas pipeline network has important economic and social significance. Based on the basic data of gas pipeline engineering, this paper has carried out the following research: 1. Based on the pipeline location, shape, volume, texture and material information in the three-dimensional data of pipeline network, Then according to the geographical position of the pipe network and the three dimensional space coordinates of the pipe section, pipe point, auxiliary facility point and its spatial topological relation, and the data of the pipe network attribute, the display system of the pipe network 3D data information is constructed. 2, from the excavation disturbance of the engineering construction, the paper constructs the 3D data display system of the pipe network. According to the experimental data, the residual strength of the gas pipeline with certain defects is evaluated, and then the strength criterion is combined with the evaluation of the residual strength of the gas pipeline. A theoretical method for evaluating the residual corrosion strength of gas pipeline under certain size defects is established, which provides theoretical support for the safety evaluation of gas pipeline engineering. 3. Based on the historical data information of gas pipe network accident, On the basis of soil corrosion, building settlement, third party damage, misoperation, design factor and accident consequence, the risk influencing factor set is established. Then, according to the interaction relationship between the factors, the weight set of the influencing factors is obtained. Then, according to the law of membership function curve, the integral grade evaluation matrix and the weight set of overall risk influencing factors are constructed. Finally, the fuzzy comprehensive evaluation is used to calculate the risk evaluation index, and the comprehensive evaluation of the safety of the pipe network by fuzzy mathematics is carried out. To determine the risk level of the pipeline network and provide scientific basis for the safety of the gas pipe network.
【学位授予单位】：北方工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU996

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