白果湾隧道下穿达成铁路段管棚施工技术

摘要

通过了解白果湾隧道的工程概况和地质情况,探讨了隧道下穿既有铁路段的施工方案,并重点阐述了管棚超前支护的施工参数及施工工艺,解决了洞内管棚施工的技术难题,同时保证了达成铁路运营安全。%Through investigating the engineering condition and geological conditions of Baiguowan tunnel,the paper explores the construction scheme of tunnel under-crossing existing railway,and mainly illustrates the construction parameter and construction technology of preparative support of pipe shed.As a result,it not only solves technological problems of internal pipe shed construction,but also guarantees safe railway transportation.