摘要
为解决大帽山新建隧道爆破对既有隧道结构的影响,采用分步钻爆开挖、楔型掏槽、炮孔堵塞等一系列技术措施,控制了爆破振动速度,同时还确定了大断面小净距隧道不同围岩中的爆破振动控制标准,此标准比类似隧道的标准大有提高。
A series of countermeasures, such as sequential excavation by means of drilling and blasting, wedge cut and shot hole stemming, are adopted in order to minimize the impact on the existing tunnel structure caused by the blasting made during the construction of Damaoshan tunnel. Due to the countermeasures taken, the blasting vibration velocity is brought under control. Blasting vibration control standard for different surrounding rocks of large cross-section and closely-spaced tunnels is determined, which is stricter than that for similar tunnels.
出处
《隧道建设》
2009年第2期232-234,238,共4页
Tunnel Construction
关键词
特大断面隧道
紧邻运营隧道
爆破振动
控制技术
tunnel with super-large cross-section
being close to operating tunnel~ blasting vibration ~ control technology
