摘要
结合云(阳)-万(州)高速公路张家山隧道小净距段的实际情况,介绍了小循环进尺、分区开挖的台阶分部法和短台阶断面法开挖,以及包括控制最大段装药量、段间隔时间、确定合理的爆破参数和对先行洞最不利部位振速监测等措施的爆破振动控制技术。实践表明:爆破振动控制技术保证了小净距段先行洞的安全和后行洞施工的顺利进行。
Based on the practical situation of small clear distance zone at the Zhangjiashan tunnel in the Yun-wan expressway,it discussed the technology of vibration blast control,which includes a series of concrete measures such as mini-bench construction method,excavating sequence and monitoring adopted in existing tunnel for controling the blast vibration.Result showed that the structure safety of existing tunnel and the construction of following tunnel were assured.
出处
《现代交通技术》
2006年第4期37-41,共5页
Modern Transportation Technology
关键词
小净距隧道
施工爆破
振动控制
振动监测
Small clear distance tunnel
Excavating blast
Vibration effect control
Vibration monitoring
