不停航跑道下超长管幕保护超浅埋大断面暗挖施工技术

Ultra-shallow Buried and Large-section Excavation Construction Technology with Ultra-long Pipe-curtain Protection Under Non-stop Flight Runway

在机场主跑道不停航条件下修建大断面浅埋暗挖平顶直墙隧道在国内外尚属首次。通过管幕超前支护、土体超前预加固注浆、多导洞开挖支护等方法解决了不停航跑道下超长管幕保护超浅埋大断面平顶直墙暗挖施工难题,跑道沉降始终控制在容许范围内,确保了飞机正常起降。

Large-section shallow flat top vertical wall tunnel under non-stop flight runway at the airport was the first time at home and abroad. The author adopted the pipe-curtain supports, consolidation grouting in advance and multi-pilot tunnel excavation supports to solve the problems of large-section ultra-shallow flat top vertical wall excavation construction with ultra-long pipe-curtain protection under non-stop flight runway. The settlement of runway was always controlled within the allowable range to ensure the normal rising and landing of aircraft.