砂质板岩三台阶七步快速开挖施工技术

On construction technique of sand slate three stages and seven steps speedy excavation

以某隧道施工为例,结合当地地质条件,采用三台阶七步流水法施工方案,对开挖过程、超前地质预报、初期支护、监控量测方面的施工工艺进行了阐述,实践表明此施工方案的实施加快了施工进度,从而提高了施工效益。

Taking some tunnel construction as the example,the paper adopts the three stages and seven steps flow method by combining with the current geological conditions,illustrates the construction craft of the excavation process,the advanced geological forecasting,the primary support,and the supervision and measurement,and proves by the practice that the construction scheme can accelerate the construction progress and improve the construction benefits.