地铁隧道钻爆法施工邻近埋地管线的安全风险管理研究

地铁隧道钻爆法施工对邻近埋地管道的影响与安全控制研究,对地铁隧道快速掘进和管道安全防护具有重要的意义。为研究地铁隧道钻爆法施工过程中邻近埋地管线的安全风险,以经济损失为评价指标,提出了地铁隧道钻爆法施工对邻近埋地管线影响的风险评估方法。首先建立考虑管线剩余强度的安全控制标准,根据模糊数学的有关方法,提出地面沉降控制标准的隶属度函数,并结合管线破坏的经济损失表达式,最终确定地表最大沉降与经济损失期望值之间的关系。最后,对大连地铁隧道沿线某混凝土上水管在钻爆法施工过程中的影响进行了风险分析,从而作为安全措施的指导依据。

Research on Safety Management of Adjacent Buried Pipelines in Blasting Excavation of Subway Tunnel

Influence of blasting excavation of subway tunnel on nearby buried pipelines and safety control are of great significance for rapid excavation and pipeline protection. In order to study the security risk of adjacent buried pipelines in blasting excavation of subway tunnel, the expression for pipeline settlement caused economic losses is first established. Then, the membership functions for Pipelines being damaged and destroyed are introduced. The rigid pipeline damage control standards are presented by considering the pipeline residual strength. Finally, the risk of buried pipeline along Dalian subway tunnel during its construction was analyzed. According to the statistical data of surface subsidence value in similar projects, the maximum surface settlement probability distribution function value was fitting out. According to the function relationship between economic loss and the surface settlement, the probability distribution curve of pipeline deformation caused by the economic loss was finally obtained.