This paper introduces the present status of construction of tunnel projects home and abroad, explains the mechanism and shoring method of weak wall rocks and excavation of unfavorable tunnels.
本文介绍了国内外隧洞工程施工的现状，阐述了软弱围岩和不良地质隧洞开挖失稳的机理和支护方法。
Therefore, it's essential to enhance the construction of civilized campus in colleges and universities. But the present status is not so pleasant, which more concern should be attached to.
因此，加强高校文明建设至关重要，但目前各高校文明建设的状况却令人不容乐观，这必须引起我们足够的重视。
Therefore, it's essential to enhance the construction of civilized campus in colleges and universities. But the present status is not so pleasant, which more concern should be attached to.
因此，加强高校文明建设至关重要，但目前各高校文明建设的状况却令人不容乐观，这必须引起我们足够的重视。
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