大直径薄壁钢管排污管线的安全评估

Safety Assessment of the Steel Thin-wall Blowdown Pipeline with Large Diameter

新建构筑物往往对周边管线安全产生威胁,管道受损又对新建建筑物和周边环境安全造成安全隐患,因此在实际工程中得到了极大的关注。简单的采用管线改迁的方案常常造成巨大的浪费,同时延误工期,而目前的管线安全控制方法以监测为主,监测数据出现异常时,往往管线已经破坏或受损,安全和正常使用均无法保证。以大直径薄壁钢管排污管道为例,以管道所属部门的相关规范为依据确定安全验算项目和安全评价标准,采用相关理论计算公式与三维数值计算相结合进行验算,继而根据其评价标准进行综合评价,为相关管道安全评估提供了参考。

The newly-built structures may induce the safe problem of the surrounding pipelines and thereby the damaged pipelines may produce potential danger to the new buildings and surrounding environment.Therefore,the safety assessment of the pipelines has attracted much attention in the real application.The easy solution is to change the pipeline route but this approach may induce large expense and the delay of the construction procedure.Current approach for pipeline safety control is mainly based on monitoring.The abnormality of the collecting data demonstrate the damage or destruction and the normal performance of the pipelines cannot be ensured.A real large scale blowdown pipeline with steel thin wall is taken as the example to carry out the checking computation and safety evaluation based on corresponding codes and specifications.The theoretical computation and three dimensional numerical analysis is conducted for the structural checking.The performance of the pipelines are evaluated based on corresponding criteria and provided as the reference of the structural safety assessment.