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墨脱公路嘎隆拉隧道是高海拔寒区隧道,并处于两大区域活动性断裂带影响内,洞身地质条件复杂,隧道区岩石片理、节理及裂隙发育,断裂带及影响范围内围岩破碎,自稳性差,隧道地下水发育,并成为隧道施工中最为严重的地质灾害。因此,合理的防水排水设计是保证隧道顺利贯通和日后运营安全的关键。本文介绍了嘎隆拉隧道特殊的地理地质环境下的防排水方案设计,并通过动态设计及时处理施工中遇到的问题,为同类隧道设计提供了有益的借鉴。
The Meguro Tunnel of Motuo Highway is a high altitude cold zone tunnel and is affected by the active fault zones in the two major regions. The geological conditions of the tunnel body are complex, and the rock fragments, joint and fracture development in the tunnel area, the fault zone and the surrounding area Broken rock, poor self-stability, the development of groundwater tunnels, tunnel construction and become the most serious geological disasters. Therefore, a reasonable design of waterproof drainage is the key to ensure smooth tunneling and operational safety in the future. In this paper, the design of drainage and waterproofing scheme under the special geogeological environment of the Ga Longla Tunnel is introduced, and the problems encountered in the construction are dealt with in time by dynamic design, which provides a useful reference for the design of similar tunnels.