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 surfaceThe stepped excavation mode with shorthole,multiround and Vshaped cut were adoptedThe maximum charge weight of one delayed interval was determined from the permitted vibration velocity for the construction to be protectedThe smooth blasting technology with adding vibrationreduction holes was usedAt the same time,the charge weight per hole was strictly controlledAlso,the monitoring of blasting vibration was carried out in excavation of the tunnelThe strength of blasting vibration was effectively under control through taking abovementioned technological measuresSo,the constructing safety in excavation of the tunnel was ensured and the constructions on surface were in good condition
出处
《工程爆破》
2002年第4期67-70,共4页
Engineering Blasting
