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贵州省安顺至紫云高速公路与沪昆铁路客运专线山岚桥隧道85°交叉,公路施工后距隧道顶的净岩柱最小厚度25.6m,为保证爆破开挖施工安全,不对山岚桥隧道的结构造成影响,按照深埋隧道结构荷载进行受力检算,分析了爆破开挖对山岚桥隧道的影响范围。结果表明,在山岚桥隧道上方地表修建安紫高速公路开挖路堑是可行的,为高速公路建设及运营时期高速公路自身及既有隧道的安全提供依据。
Anshun to Ziyun Expressway in Guizhou Province intersects with Shanlan Bridge Tunnel in Shanghai-Kunming Railway Passenger Dedicated Line with a minimum net thickness of 25.6m from the top of the tunnel after highway construction. In order to ensure the safety of blasting excavation, the structure of Shanlan Bridge Tunnel The influence of blasting excavation on Shanshanqiao tunnel is analyzed based on the structural load of deep tunnel. The results show that it is feasible to construct the road excavation of the An Zi highway above the surface of Shanlan Bridge so as to provide a basis for the safety of the expressway itself and the existing tunnel during the construction and operation of the expressway.