Support of the Continuing Activities of the U.S. National Committee on Tunneling Technology

为美国隧道技术委员会提供支持。该委员会的主要活动涉及地下开口稳定性的技术问题。该委员会过去的活动有助于实现国家对地震生命线工程岩土研究的关注。该委员会计划解决地下隧道的几个关键问题，与地下开口相关的危害，以及隧道和地下开口的地震影响。

Support is provided for the U.S. Committee on Tunneling Technology. Major activities of this committee are related to the technical issues involving the stability of subsurface openings. Past activities by the committee have helped to achieve a national focus on geotechnical research for earthquake lifeline engineering. The committee plans to address several key issues in subsurface tunneling, hazards associated with subsurface openings, and the earthquake impact of tunnels and underground openings.