中文摘要：

地铁施工造成的邻近管线危害及其保护是一个重要问题。文章以西安地铁3号线为工程背景,采用现场调查法得到了地下管线因地铁施工而产生的主要破坏形式;基于专家调查法得出地铁施工对邻近管线变形的一级影响因素主要有：工程地质与水文地质因素、管隧距离、施工因素和管线特性;二级影响因素主要有：管线水平距离、管线垂直距离、施工方法、管线大小、管内压力、管线埋深、管线接头形式、管线与隧道角度等;基于模糊综合评判法确定了不同管线的风险等级,给出了不同安全风险等级的管线保护措施,建立了地铁施工邻近管线安全风险评估体系,为管线安全管理控制提供了可靠依据。

英文摘要：

Considering that metro construction may cause damage to adjacent underground pipelines and using theconstruction of Xi′an Metro Line 3 as an example, this paper determines the main modes of pipeline damage througha field investigation. The main influential factors for pipeline deformation（e.g., engineering geology, hydrogeology,distance between the tunnel and pipeline, tunnel construction and pipeline characteristics） and the secondary fac-tors（e.g., horizontal/vertical distance between two pipelines, construction method, pipeline size, pressure in the pipe-line, burial depth of the pipeline, pipeline joint type, angle between the pipeline and tunnel） are determined basedon expert investigation. The risk grades of different pipelines and the corresponding protection measures are deter-mined by adopting a fuzzy comprehensive evaluation and a relevant risk assessment system is established for pipe-line safety.