关键词: 公路隧道, 临时支护结构, ANSYS模态分析, 爆破振动波主频段, 爆破安全施工

Abstract: The dynamic response of a temporary support structure of a highway tunnel was analyzed in this article. The dynamic response at different conditions of the temporary support structure，composed of a skeleton and concrete lining structure ，was analyzed by ANSYS. With simplifying it as single concrete material shell supporting structure model，it completed the preparatory work of the dynamic analysis of the whole tunnel model under blasting load. It was found that the natural frequency of eachorder modal was within the main band of blasting vibration wave when doing the modal analysis of finite element model，which provided the reference for the safety of the blasting construction of the tunnel.

Key words: highway tunnel, temporary support structure, ANSYS modal analysis, main band of