随着城市经济的不断发展，城市地铁日益发挥着重要作用，它给城市带来巨大的社会经济效益、社会效益和军事效益，但同时也给复杂的市政管网带来了一系列的安全问题。地铁建设在穿越地下管线时，每次隧道开挖都会不可避免地对地下管线引起扰动，从而使其受力变形，如果管线变形过大，超过其允许安全变形，管线将会出现裂缝甚至断裂，导致事故的发生。市政管网系统作为城市的生命线，它的安全与否直接危害着国民生产建设和人民的生命财产安全，因此研究管线变形规律具有重要的现实意义和深远的理论意义。本论文以典型Winkler地基梁模型计算了管线的变形和内力，并结合现场实测和数值模拟系统研究了地下管线的变形规律，论文取得主要内容和结论有： （1）系统总结了地下管线的相关知识，包括管线类别、材质、接口方式以及监测方法等。 （2）基于Winkler地基梁模型建立了管线的微分控制方程，然后求解微分方程得出了管线的位移和内力表达式，最后进行了参数敏感性分析，研究出了管线埋深、管材、管隧倾角、管径和管壁厚等不同因素对管线位移和内力的影响规律。 （3）以西安地铁3号线建工路-咸宁路区间工程背景为依托，分析研究了地铁隧道开挖对垂直管线和平行管线的影响规律，结论指出在浅埋暗挖法中，当管线与隧道走向垂直时，地表最终沉降曲线形式为“双峰”形式,其沉降最大值分别位于两隧道轴线正上方；当管线平行于隧道轴线时，管线的变形会因隧道施工先后顺序不同而发生差异沉降，但是最终沉降基本趋于一致。 （4）采用数值模拟，分析比较了不同工法对管线的影响，结论指出在台阶法、环形开挖留核心土法、CRD法和双侧壁导坑四种工法中，其对管线影响最大的是上下台阶法，其次为预留核心土法、CRD法，影响最小的是双侧壁导坑法。 （5）系统总结了地下管线的安全判别方法，并以此提出了地下管线的安全控制措施。

With the continuous development of urban economy, urban subway play an increasingly important role, it brings to the city of great economic benefits, social benefits and military benefits, but also has brings a series of safety problems to complex municipal pipe network. When the subway construction crosses underground pipelines, tunnel excavation will inevitably lead to the disturbance of the underground pipeline,making it stress and deformation. If pipeline deformation is too large, more than the allowed safety deformation, pipeline will crack, even fracture, leading to accidents. As the lifeline of the city, its security or not directly endanger the normal national production and construction and people's life and property security, so the research on pipeline deformation law has important realistic meaning and profound theoretical significance. This paper calculate the deformation and internal force of pipeline in a typical winkler Beam on elastic foundation model,and systematically studys deformation law of underground pipeline combined with field measurement and numerical simulation. The main contents and conclusions of this study are as follows: （1）Summarize the relevant knowledge of underground pipelines, including pipelines categories、 materials、 interface method and monitoring method, etc. （2）Differential control equation of pipeline is established based on the Winkler Beam on elastic foundation model, Then solve the differential equation and obtain displacement and internal force expression of the pipeline , finally carrys on the parameter sensitivity analysis and works out the laws of effects of different factors on pipeline,including the buried depth 、 material、 angle of the tunnel and pipeline 、 diameter and wall thickness, etc. （3）On the background of Xi 'an metro line 3 Jiangong road - Xianning road interval,studying the influence law of subway tunnel excavation on vertical and parallel pipeline, the conclusion points out that in the shallow depth excavation method, when the pipeline verticals to the tunnel towards ,pipeline deformation curve is in the form of "twin peaks", the maximum subsidence respectively locating above the tunnel axis,and when the pipeline parallels to the tunnel towards, pipeline deformation will occur differential settlement due to different sequence of tunnel construction, but the final settlement tends to be consistent. （4）Comparative analysising the influence of different construction methods on pipeline by numerical simulation，the conclusion points out that the degree of the biggest influence on the pipeline is bench method in the four construction methods，followed by the reservation core of annular excavation method and CRD method，the minimal influence is the double side heading method. （5）The safety discriminant method are proposed, and puts forward the safety control measures of underground pipeline.