浅谈矿山法小净距隧道的设计与施工

小净距隧道是指并行公路隧道间夹岩石厚度较小, 一般小于1.5倍隧道开挖断面宽度的一种特殊隧道结构型式。小净距隧道方案不仅能很好地满足特殊地质及地形条件，而且有利于公路整体线型规划和线型优化，能较好地解决连拱隧道存在的缺点，具有显著的经济、社会、环境效益。本文将简要介绍一下小净距隧道断面设计与结构设计以及施工中开挖、钻爆作业、中间岩柱加固、监控量测等关键技术，进而得出小净距隧道的合理净距，最后，就目前技术法规条件下，对小净距隧道建设过程中应注意的问题提出一些建议。

The Design and Construction of Small-Clear-Distance Tunnel

The Small-Clear -Distance Tunnel is a special type of tunnel structure that the rock thickness between a parallel highway tunnel is smaller, generally less than 1.5 times the width of the tunnel excavation section. The Small-Clear -Distance Tunnel option is not only well positioned to meet the special geological and topographic conditions, but also conducive to the overall highway planning and linear optimization and better address the shortcomings of the double-arch tunnel, with significantly economic, social, environmental efficiency. This article will briefly describe the key technologies which contains section design and excavation, drilling and blasting operations, reinforcement of middle rock column, monitoring and measurement in structure design and construction of Small-Clear -Distance Tunnel, then arrive at the reasonable spacing of Small-Clear -Distance Tunnel, finally, give some suggestions in Small-Clear -Distance Tunnel construction under the present conditions of technical regulations.