公路隧道近距离上跨高铁隧道安全影响分析

Analysis on Safety Impact of Highway Tunnel Short Distance Crossing High Speed Railway Tunnel

随着国内外隧道工程的高速发展,新建隧道上跨、下穿或并行既有隧道施工的现象日益增多,而新建隧道施工必定会对邻近的既有隧道结构内力及变形产生一定影响,严重时甚至影响既有隧道的正常使用。借助有限元分析软件,模拟某新建公路隧道近距离上跨既有高速铁路隧道的施工过程,并对新建隧道施工对既有隧道振动影响做了相关分析,结果表明:新建公路隧道施工对既有高速铁路隧道结构的变形及受力状态产生了一定的影响,但影响程度均在规定的安全范围之内。

With the rapid development of tunnel engineering at home and abroad,the construction of new tunnels across,under or in parallel with existing tunnels is increasing.The construction of new tunnels will have a certain impact on the internal force and deformation of adjacent existing tunnels,and even affect the normal use of existing tunnels.In this paper,with the help of finite element analysis software,the construction process of a new highway tunnel crossing the existing high-speed railway tunnel in a short distance is simulated,and the impact of the new tunnel construction on the vibration of the existing tunnel is analyzed.The results show that the new highway tunnel construction has a certain impact on the deformation and stress state of the existing high-speed railway tunnel structure.However,the degree of impact is within the specified safety range.