新建公路隧道上跨既有铁路隧道的安全性评价

Safety Evaluation of Newly-built Highway Tunnel Overcrossing the Existing Railway Tunnel

新建公路隧道上跨既有铁路隧道时,既有隧道向上的拉伸变形会损伤隧道衬砌和轨道。通过数值分析,研究了既有铁路隧道受影响范围衬砌及轨道变形,分析了衬砌内力情况,对隧道结构及轨道安全性进行评价,进而对新建公路隧道上跨既有铁路隧道的施工和运营提出建议和处理措施,确保了铁路隧道的运营安全,为同类工程提供了宝贵经验。

When the newly-built highway tunnel overcrosses the existing railway tunnel, the upward tensile deformation of the existing tunnel will damage the existing tunnel lining and track. The lining and track deformation in the affected area of the existing railway tunnel are studied through the numerical analysis, the internal force of lining is analyzed, and the tunnel structure and track safety are evaluated, so as to put forward the suggestions and treatment measures for the construction and operation of the newly-built highway tunnel overcrossing the existing railway tunnel to guarantee the operation safety of the railway tunnel and provide valuable experience for similar projects.