节理岩体深路堑预裂爆破开挖技术

Pre-spiltting technology of crevice cut rock digging

结合京沪高速公路山东临沂—化马湾段深路堑爆破开挖的工程实际,探讨了在层状倾斜岩体地质条件下进行路堑边坡预裂爆破有关参数的设计过程和设计中应注意的问题,对施工中出现的实际问题提出了有效的处理方法,根据层状倾斜岩体内部节理的分布特征及分布形式,分析了节理对预裂爆破效果产生影响的过程和原因,并提出了相对合理的解决方法,探讨了预裂孔超深和布置拉裂孔设计的有关参数,指出进行深路堑爆破时,必须充分重视施工工艺对最终效果的影响。

With the engineering reality of digging cut in the Jing-Hu highway, some parameters about digging slope pre-splitting under the condition of layer inclining rock and some questions that should be paid attention to are dealt with. Some efficient methods are brought forward in accordance with the practical problems. Based on the distribution earmark and condition of the layer inclining rock, the courses and reasons for the effects of pre-spiltting are analyzed, and the more reasonable method are put forward. The parameters about pre-splitting hole and fission hole are dealt with, and the construction techniques should be taken into account.