高速铁路兰州至张掖三四线越岭隧道选线研究

Research on Summit Tunnel Route Selection of the Third and Fourth Lines on LanZhou ～ ZhangYe High Speed Railway

结合高速铁路兰州至张掖三四线乌鞘岭越岭地形地貌、不良地质、自然保护区等控制因素及相邻既有铁路情况,按照高速铁路"短、直、快"的选线原则之外,从工程地质、环保、经济、安全、工期等方面对地质条件复杂的乌鞘岭越岭方案进行研究,经多方案分析研究,沿既有铁路越岭隧道并行敷设,不但可满足高速铁路选线原则,还可以充分利用既有隧道斜井、竣工地质勘察资料及施工措施经验,解决乌鞘岭工程地质复杂选线问题。

With reference to such control factors as topography, bad geology, nature reserve areas of along the tunnel line and the conditions of adjacent existing railway, this paper studies Wushaoling summit tunnel route selection in terms of engineering geology, environmental protection, economy, safety,construction period and complex geological conditions. To meet the route selection requirements of short,straight and fast,the analysis of multi plans recommends the route of the new tunnel parallel to the existing summit tunnel, which not only satisfies high-speed railway route selection principle, but also makes full use of the existing tunnel inclined shaft,the on-hand information of geological exploration and construction experiences and measures to serve the new tunnel.