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近年来,随着高速隧道的迅猛发展,小净距隧道大量涌现,而小净距隧道在施工时面临的最大的问题即为后行洞施工对先行洞既有支护结构的影响。本文依托某高速公路隧道施工工程,基于现场测试的技术手段研究后行洞施工爆破作业对先行洞既有初期支护的影响规律,研究成果可为国内外相关工程提供借鉴。
In recent years, with the rapid development of high-speed tunnels, a large number of small-spacing tunnels have emerged in large numbers. However, the biggest problem encountered in the construction of small-spacing tunnels is the influence of the construction of the after-going tunnels on the existing supporting structures of the preceding tunnels. In this paper, based on a highway tunnel construction project, based on the field test technical means to study the impact of backhoe construction blasting operations on the early support of the preemptive tunnel, the research results can provide reference for related projects at home and abroad.