摘要
渝湘高速铁路长江越岭隧道东西方向穿越南山,南山呈北东向展布,地形起伏较大,地势陡峻,地下溶洞、地下河、岩溶泉等均有发育,岩溶槽谷地表水均通过漏斗、落水洞等转入地下,而未形成大的地表水系。根据现有4条南山隧道的穿越位置、工程特点,以及长江越岭隧道线路走向、渝中半岛主要建、构筑物分布及对既有工程的南山隧道情况的资料收集和现场调查,拟定了3个穿南山方案。综合分析工程地质条件、环境影响、社会风险和工程风险等因素,推荐选定经翠云水库方案,工程地质条件较好,社会风险、环境风险均可控,且该方案隧道岩溶段采用下坡,保证了可溶岩段地下水通过顺坡自然排出洞外,避免了岩溶水倒灌长江隧道V形坡段的风险,工程及运营风险亦可控。
The Yangtze River Mountain-crossing Tunnel of Chongqing-Hunan High-speed Railway passes through the Nanshan Mountain in the east-west direction.The Nanshan Mountain is distributed in the northeast direction,featuring relatively large topographic relief,steep terrain,and developed underground karst caves,underground rivers,karst springs,etc.The surface water in karst troughs flows underground through depression cones,sinkholes,etc.,without forming a large surface water system.Three options for crossing the Nanshan Mountain are proposed according to the alignment and engineering characteristics of the existing 4 tunnels in the Nanshan Mountain,the route alignment of the Yangtze River Mountain-crossing Tunnel,the distribution of main buildings and structures in Yuzhong Peninsula,the data of tunnels in the Nanshan Mountain collected from the existing projects,and the field investigation results.In view of such factors as engineering geological conditions,environmental impacts,social risks and engineering risks,the option of passing through Cuiyun Reservoir is recommended.Moreover,in this option,the karst section of the tunnel is downgrade,which ensures that the groundwater in the soluble rock section naturally drains out of the tunnel through the slope,and avoids the risk of karst water flowing backwards into the V-shaped slope section of the Yangtze River Tunnel,so that the engineering and operation risks are controllable.
作者
才广
CAI Guang(CREECC(Chongqing)Survey,Design and Research Institute Co.,Ltd.,Chongqing 400023,China)
出处
《高速铁路技术》
2022年第3期72-75,共4页
High Speed Railway Technology
关键词
隧道工程
方案比选
现场调查
工程风险
选线分析
tunnel engineering
option comparison and selection
field investigation
engineering risk
analysis on route location
