Combined with the actual tunnel construction, this paper summarizes the trenchless technology of tunnel three-step temporary invert method, and mainly describes the construction technology and specific construction points of this method.%本文结合实际隧道工程施工，对隧道三台阶临时仰拱法开挖技术进行总结，重点阐述了该方法的施工工艺及注意要点。
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