小间距隧道爆破对既有隧道振动影响分析Analysis of Vibration Influences of Small Spacing Tunnel Blasting on Existing Tunnel
王春梅
摘要(Abstract)：
以实际工程为依托,分析爆破振动对临近既有隧道的影响。施工前对既有隧道进行结构病害检测并评估其安全状况,施工过程中对既有隧道爆破振动速度进行现场监测,以确保爆破施工过程中既有隧道的结构安全。对现场监测结果进行统计和回归分析,确定了爆心距以及分段装药量对于爆破振速传播规律影响,将爆破振动对既有隧道衬砌的影响根据爆破振动速度分为无影响、微影响、较大影响和安全性影响4个等级。针对于小净距隧道工程特点,提出爆破安全控制技术措施及处治建议,包括合理开挖工法的选择、分段装药量的确定及掏槽形式的选择等。
关键词(KeyWords)： 小间距隧道;振动监测;爆破振动传播规律;爆破控制
基金项目(Foundation): 国家863项目(2007AA03Z329);; 国家自然科学基金项目(10576026);; 四川省科技厅重点公关项目(05GG009-018-04)
作者(Author): 王春梅
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