西部山区铁路隧道涌水抽排施工方案探讨

Discussion on Tunnel Water-burst Pumping and Drainage Construction Scheme of Western Mountain Railway

西部山区铁路建设中,因地形环境复杂,施工中易产生涌水、突水地质灾害。为保证施工质量及安全、减少施工风险及事故,文章以玉蒙铁路某隧道为例,从隧道地质水文特点入手,采用现场实践总结和理论数据计算相结合的手段,严格制定抽排水施工方案基本原则、施工组织原则及细则,分析了包括泵站位置选设、水泵配型、水管选径、抽排能力等要素的施工方案,并就可能出现的正常工况和突发涌水工况分别进行探讨,确定了不同环境下分级抽排施工组织及设备配置,为提高复杂涌水隧道反坡抽排施工方案提供了新的技术支持。

Water-burst has become the most normal geological disaster problem for western mountain railway construction due to the complex terrain environment. In order to guarantee construction quality and safety,and reduce construction risks and accidents,a tunnel of Yuxi-Mengzi railway is taken as an example in this paper. From the perspective of geological and hydrological features,this paper formulates strict basic principles of construction scheme and principles and specifications of construction organization for pumping and drainage,by adopting combined methods of on-site construction summary and theoretical data calculation. Construction schemes including the factors of the site selection of pump station,pump types,diameters,pumping and drainage capacity are analyzed,the regular working condition and the sudden water-burst working condition are discussed separately,and the construction schemes of the classified pumping and drainage and equipment allocation under different circumstances are confirmed,which provides new technological support for the improvement of counter-slope pumping and drainage construction scheme for complex waterburst tunnels.