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1序言由于隧道技术的发展和今天社会形势的要求,公路隧道断面正稳步地趋向大型化。可以说这是隧道支护结构的变化、施工机械及施工管理技术的迅速发展所产生的结果。 另
1 Introduction Due to the development of tunnel technology and the requirements of today’s social situation, the section of highway tunnels is steadily becoming larger. It can be said that this is the result of the change of the tunnel support structure, the rapid development of construction machinery and construction management technology. another