预裂爆破在软岩地段高边坡路堑开挖中的应用

The Application of Pre-splitting Blasting to Excavation on High Slope in Soft Rock Section

通过对公路施工中边坡路堑开挖的几种爆破方式的分析 ,指出预裂爆破技术最能适应节理、裂隙发育且表层风化严重的软岩地段。提出了一种适应该地段高速公路高边坡路堑开挖的爆破布孔方式 ,并就其参数设计进行了探讨。现场施工实践表明采用这种爆破方式可以取得良好的爆破效果。

Based on analyzing about blasting mode of slope in the construction of road, the paper shows that pre splitting blasting is mostly suitable in the section of severely weathering soft rock with developed joints and fractures, introduced the laying out about the hole of pre splitting blasting that can apply in the high slope of the expressway in the section, and designed the parameter. The practice shows that it gained favourable effect by this method.