分区组合爆破在硬岩暗挖地铁车站中的应用
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摘要
青岛地铁3号线的青岛站为硬岩暗挖大断面车站,紧贴地铁2号线和商场,为高效开挖并确保既有构筑物的安全,在紧贴底板开挖区域顶部设置一排大直径不装药空孔隔振孔,并对爆破区域合理分区。爆破区域中部采用乳化炸药掏槽,提供临空面,上部爆破区域采用金属膨胀剂多次剥离破岩,下部爆破区域采用常规钻爆法提高工效。大直径中空孔掏槽、周边空孔减振、隔孔装药、孔内孔外联合延时起爆、使用金属膨胀剂,以上多种减振和分区组合爆破技术的应用,实现了大断面硬岩暗挖地铁车站紧贴既有构筑物的成功开挖,可为类似工程提供参考。
The Qingdao subway station of Qingdao metro No.3line is close to the No.2line and a market with a large underground excavation section.The efficient excavation should be realized and the safety of existing structures should be ensured.At the top of blasting area close to baseboard,a row of large diameter no-charge vibration isolators were arranged,and the blasting area was divided reasonably.Emulsion explosive was used in the middle of the blasting area to provide the temporary surface.The metal expansive agent was adopted in the upper blasting area to peel off the rock and conventional drilling and explosion method in the lower part of the blasting area was used to improve work efficiency.Large diameter hollow hole cutting,peripheral cavity vibration reduction,charge,joint delay initiation of hole outside and inside,the using of metal expansion agent,the application of technologies above had realized the successful excavation and it could provide a reference for similar projects.
The Qingdao subway station of Qingdao metro No.3line is close to the No.2line and a market with a large underground excavation section.The efficient excavation should be realized and the safety of existing structures should be ensured.At the top of blasting area close to baseboard,a row of large diameter no-charge vibration isolators were arranged,and the blasting area was divided reasonably.Emulsion explosive was used in the middle of the blasting area to provide the temporary surface.The metal expansive agent was adopted in the upper blasting area to peel off the rock and conventional drilling and explosion method in the lower part of the blasting area was used to improve work efficiency.Large diameter hollow hole cutting,peripheral cavity vibration reduction,charge,joint delay initiation of hole outside and inside,the using of metal expansion agent,the application of technologies above had realized the successful excavation and it could provide a reference for similar projects.
引文
[1]国家安全生产监督管理总局.爆破安全规程:GB 6722-2014[S].北京:中国标准出版社,2014.State Administration of Work Safety.Safety regulations for blasting:GB 6722-2014[S].Beijing:China Standards Press,2014.
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[5]靳红生,李祖栋.逐孔起爆毫秒延时爆破技术在太钢铁矿的应用[C]//汪旭光.中国爆破新进展.北京:冶金工业出版社,2014:284-288.JIN H S,LI Z D.Application of hole by hole initiation ms-delay detonation technology in Taigang iron mine[C]//WANG X G.New progress and development of blasting in China.Beijing:Metallurgical Industry Press,2014:284-288.
[2]汪旭光.爆破手册[M].北京:冶金工业出版社,2010:251.WANG X G.Handbook of blasting[M].Beijing:Metallurgical Industry Press,2010:251.
[3]王学兵,刘治兵,王明明,等.控制爆破技术在华龙一号核岛负挖工程中的应用[J].工程爆破,2016,22(3):68-69.WANG X B,LIU Z B,WANG M M,et al.Controlled blasting technology in Hualong No.1nuclear negative excavation engineering[J].Engineering Blasting,2016,22(3):68-69.
[4]张继春.工程控制爆破[M].成都:西南交通大学出版社,2011:56.ZHANG J C.Controlled blasting for engineering[M].Chengdu:Southwest Jiaotong University Press,2011:56.
[5]靳红生,李祖栋.逐孔起爆毫秒延时爆破技术在太钢铁矿的应用[C]//汪旭光.中国爆破新进展.北京:冶金工业出版社,2014:284-288.JIN H S,LI Z D.Application of hole by hole initiation ms-delay detonation technology in Taigang iron mine[C]//WANG X G.New progress and development of blasting in China.Beijing:Metallurgical Industry Press,2014:284-288.