在既有隧道旁开挖新的隧道,而不能影响线路的运营,这对新建隧道的施工来说具有相当大的难度,特别是在两隧道线间距很小的情况下,可谓是难上加难。文章简要地介绍了宝成复线须家河隧道在非常困难的条件下,控爆施工过程以及采取的主要技术措施。 Excavating a new tunnel beside the existing tunnel can not affect the operation of the line, which is quite difficult for the construction of the new tunnel. Especially when the spacing between two tunnel lines is small, it is difficult to increase difficult. The article briefly introduces the Baojian-Shuang-Xujiahe tunnel under very difficult conditions, the explosion control construction process and the main technical measures taken.