By enumerating the risk source in tunnel unkennel construction process the analytic hierarchy process and fuzzy comprehensive evaluation methods were used to evaluate instability risk of tunnel portal . And the corresponding risk control countermeasures were proposed .

列举 出 洞施工过程中的风险源，采用层次分析法和模糊综合评价法进行隧道 出 洞 洞口失稳风险评估，提出了对应的风险控制对策。

Three-dimensional numerical analysis method was used to study the characteristics of deformation and stress of surrounding rock and supporting structure on the process of tunnel unkennel construction . The comparative analysis of three-steps-seven-footwork tunnelling method and small pilot tunnel method were performed . 3 .

采用三维数值分析手段研究隧道 出 洞施工过程中的围岩与支护结构变形受力特点，分别对三台阶七步法和超前小导洞法两种 出 洞施工方案进行对比分析。

They are seeking to unkennel the traitor .

他们正在设法 找出叛徒。