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大瑶山隧道是衡阳至广州铁路复线中的重点工程,位于衡广段的坪石至乐昌之间。隧道穿越的地形、地质条件是极为复杂的瑶山山区和武水峡谷,全长14.3公里,是我国目前最长的双线铁路隧道,也是衡广复线通车的关键工程。隧道采用双线全断面机械化一次爆破成型;同时把光面爆破,喷锚支护,现场监测三者结合起来,运用新奥地利隧道掘进法(简称新奥法,NATM)原理,对原用的隧道施工方法进行革新。这在我国铁
Dayaoshan tunnel is Hengyang to Guangzhou railway double-track project, located in Heng Guang section of the stone to Lechang between. Tunnels through the topography, geological conditions are extremely complex Yaoshan Mountain and Wushui Canyon, a total length of 14.3 kilometers, is China’s longest two-lane railway tunnel, but also the key project of the opening of the railway cross-Guang double. The tunnel adopts double-line full-face mechanized one-shot blasting. At the same time, combining the smooth blasting, shot blasting and anchor support and on-site monitoring, the new tunneling method (NATM) Construction methods for innovation. This is iron in our country