工程爆破

2002, (01) 47-49

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电气化铁路既有线深路堑扩堑石方控制爆破
EXPANSION OF DEEP ROCK CUT BY CONTROLLED BLASTING AT EXISTING ELECTRIFIED RAILWAY LINE

宁远思
NING Yuan shi (The 15 th Engineering Bureau of China Railway Construction Corp ,Jiaozuo,Henan 454003, China)

摘要(Abstract):

介绍电气化铁路既有线无隔墙台阶爆破扩堑方法。沿既有线方向设置低台阶 ,边界处布置光爆孔 ,采用“同列同段和列间微差”的起爆网路。采用自制的“炮被”和架设“钢管排架”阻挡飞石、滚石和滑石 ,确保了既有线的安全。文中还概述了“炮被”和“钢管排架”的制做以及作者的认识和体会。
This paper presents the no partition bench blasting method for cut expansion at an existing electrified railway line The low benches were set up along direction of the existing line,the smooth blasting holes were arranged on the borders and the priming circuit with same delay interval to blastholes in same column but different delay intervals to different columns was used The self made"blasting cover"and"steel pipe bent"were applied to stop flying,running and sliding rocks,thus ensuring the safety of the existing line In addition,the manufacture of"blasting cover"and"steel pipe bent"and author's experience were outlined

关键词(KeyWords): 路堑开挖;光面爆破;控制爆破;安全措施
Cut excavation; Smooth blasting; Controlled blasting; Safety precautions

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作者(Author): 宁远思
NING Yuan shi (The 15 th Engineering Bureau of China Railway Construction Corp ,Jiaozuo,Henan 454003, China)

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