大坪隧道掘进中爆破震动的控制  

CONTROL OF BLASTING VIBRATION IN EXCAVATION OF DAPING TUNNEL

作　　者：朱泽兵 张东明 

机构地区：[1]中铁十一局集团五公司,重庆400037

出　　处：《工程爆破》2002年第4期67-70,共4页Engineering Blasting

摘　　要：重庆轻轨大坪车站隧道最小埋深仅4m,地面人口密集,建筑物林立。采用了浅孔、多循环和楔形掏槽的分步开挖方式;根据被保护建筑物的安全振速确定最大一段药量;采用了增设减振孔的光面爆破技术;同时严格控制单孔药量。在开挖施工过程中还进行了爆破震动监测。上述技术措施有效地控制了爆破的地震强度,保证了开挖施工的安全,地表建筑物没有损坏。In Chongqing light railway project,Daping station tunnel has a minimum buried depth of only four meters and dense population and constructions on surfaceThe stepped excavation mode with shorthole,multiround and Vshaped cut were adoptedThe maximum charge weight of one delayed interval was determined from the permitted vibration velocity for the construction to be protectedThe smooth blasting technology with adding vibrationreduction holes was usedAt the same time,the charge weight per hole was strictly controlledAlso,the monitoring of blasting vibration was carried out in excavation of the tunnelThe strength of blasting vibration was effectively under control through taking abovementioned technological measuresSo,the constructing safety in excavation of the tunnel was ensured and the constructions on surface were in good condition

关 键 词：大坪隧道 爆破震动 隧道掘进 分步开挖 控制爆破 振动监测 重庆轻轨较新线 

分 类 号：U455.41[建筑科学—桥梁与隧道工程]