软弱围岩隧道台阶施工中拱脚稳定性及其控制技术

The Stability of the Spring of Arch in the Construction of Foot Steps of Tunnel with Soft Surrounding Rock and Its Control Technique

本文主要简单介绍了软弱围岩隧道台阶施工工程的相关内容，对软弱围岩隧道拱脚变形的特征进行了分析，探讨了软弱围岩隧道台阶施工中拱脚稳定性的有效控制技术，以保障软弱围岩隧道台阶施工水平，提高其施工质量和效益。

This paper mainly introduces the related content of the construction of steps of tunnel with soft surrounding rock, analyzes the deformation characteristics of the springs of the arch, and discusses the effective control technology of the st- ability of the springs of the arch in step construction, in order to protect the construction level of the construction of steps of tunnel with soft surrounding rock to increase the construction quality and efficiency.