针对卵石土隧道的施工难点，经比选确定了最优方案，简单阐述了工法特点、适用范围及工艺原理，详细归纳了三台阶快速开挖作业流程及操作要点，效果验证得出该工程施工效果良好，解决了施工难题。%According to the difficulties of construction for pebble tunnel, the paper identifies the optimized scheme after comparison, illustrates the features of the construction method, the applied scopes, and the craft principle, sums up the work process and operation points for the three-step speedy excavation, and concludes by the results that the construction effect of the projects is better and the construction difficulties are solved.
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