超浅埋暗挖隧道施工技术

摘要

The paper mainly introduced the ＂Shallow Tunneling Method＂ construction technology.It could be described as that to ensure the normal traffic conditions of the highway above,the ultra-shallow tunnel flat-roofed straight wall of ultra wide cross-section,0.5~2.5 m buried depth,use pipe roof advance support while undercrossing.Combined with advanced small catheter grouting reinforcement,construction of multi-channel programs and micro-level pilot tunnel excavation method,Shallow Tunneling Method could control surface subsidence and ensure construction safety.%介绍了在确保隧道上方高速公路地面交通正常通行的情况下,超宽断面、埋深仅为0.5～2.5 m的超浅埋平顶直墙下穿隧道工程采用管棚超前支护,结合小导管注浆加固地层、多导洞施工方案和微台阶开挖法来达到控制地表沉降和保证施工安全的施工技术。