大断面隧道分部开挖的爆破技术  

Blasting Technology in the Large-section Tunnel with Step Excavation

作　　者：邓诗泉[1] 栾龙发[1] 

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093

出　　处：《价值工程》2014年第5期125-126,共2页Value Engineering

摘　　要：长水机场至杨林经济技术开发区道路工程中的八家村隧道是大断面、围岩自稳能力差,运用三台阶七步开挖法和光面爆破技术,对爆破参数、炮孔布置和装药结构等进行优化设计,取得了良好的爆破效果。该方法操作简单、安全方便和经济效益好,可为今后类似的隧道掘进提供一定的参考价值。The characteristics of Ba Jiacun Tunnel which is on the load from Chang Shui airport to Yang Lin economic and Technological Development Zone is the large-section tunnel with poor stability surrounding rock. The blasting parameters, blast hole layout and changing structure were optimized by three step and seven procedure excavation method and smooth blasting technology, which gained good blasting effect. This method has the advantages of simple operation, safety, convenience and good economic benefit, which can provide certain reference value for future similar tunnel.

关 键 词：大断面 自稳能力 三台阶七步开挖法 光面爆破技术 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]