三台阶七步法在软岩隧道应用技术探讨

Exploration on the excavation method by three stairs and seven steps in soft rock tunnel

探讨了三台阶七步法在软岩隧道中的应用,对超前地质预报、加强支护、步距控制、监控量测等关键技术进行了分析,并与双侧壁导坑开挖法、CRD法等进行了比较,总结归纳了该法的优点,以期更加完善的推广应用该工法。

This paper explores the application of excavation method by three stairs and seven steps in soft rock tunnel, analyzes key techniques of tunnel geological predication, strengthening support, step distance control, and monitoring and measuring, and compares excavation method by three stairs and seven steps with double-side-wall excavation method and CRD method, so as to perfect its popularization and application.