Sealing the entrances to a tunnel system is often the simplest way to disable it.
要使目标瘫痪，封闭地道系统入口通常是最简单的办法。
2
There are multiple sources of risk in segmental tunnelling, so analysis is made of the source of leakage risk from the tunnel tail sealing.
盾构法隧道施工风险源具有多维性，为此对盾尾密封渗漏风险源进行分析。
3
Examples are presented at the end of this paper to analyze the influence of the partial sealing property of tunnel on stress, displacement and pore pressure.