渭河隧道拱部外露地表开挖施工技术采用三台阶临时仰拱法施工,结合大管棚超前注浆预加固技术和监控量测数据为依据及时调整施工参数.本文介绍拱部外露隧道开挖施工技术,既保护隧道周围环境,又保证隧道施工安全质量、工期效益.%The construction technique of the exposed surface excavation of Weihe tunnel arch uses three-step temporary inverted arch.The construction parameters are adjusted in time by the pipe shed advanced pre grouting reinforcement technology and monitoring nmeasurement data.This paper introduces the construction technology of the exposed tunnel of the arch,which not only protects the surrounding environment of the tunnel,but also guarantees the safety and quality of the tunnel construction.
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