圆梁山隧道穿越粉细砂层注浆加固体的减震爆破技术

Shock-reducing blasting technique applied to Yuanliangshan tunnel through grouting-reinforced silty fine sand stratum

圆梁山隧道PDK35 4+ 4 30～PDK35 4+ 4 90段属粉细沙充填型溶洞 ,开挖困难 ,施工中在采用注浆法对围岩进行加固和堵水后 ,进行爆破施工。文章介绍溶洞内加固体的减震爆破施工技术。