蒋文斌;赵自奇;刘士兵;傅建莉;郑永泽;
JIANG Wen-bin;ZHAO Zi-qi;LIU Shi-bing;FU Jian-li;ZHENG Yong-ze;Hunan Nanling Explosive Engineering Co.,Ltd.;Hunan Water Conservancy and Hydropower Construction Group Co.,Ltd.;

• 1:湖南南岭民爆工程有限公司
• 2:湖南水总水电建设集团有限公司

摘要(Abstract)：

针对临时堵塞内部结构不明的复杂情况,为确保在36m深水压作用下的施工安全,采用了循环开挖导坑、分部实施爆破的方法,应用水平多级楔形与垂直楔形组合掏槽技术对临时堵塞进行了拆除,达到了预期的效果。导坑的开挖为临时堵塞的爆破增加了临空自由面,并提供了足够的补偿空间,为堵塞一次爆通成型创造了良好条件。工程实践证明,导坑开挖与楔形组合掏槽设计可为类似工程设计提供参考。
For unknown complicated situation in temporary internal plugging structure,in order to ensure the construction safety under 36 mdeep water pressure,the method of cycle excavation blasting in pilot tunnel and division implementation blasting was applied.The level multistage wedge combined with vertical wedge cutting technique was used in temporary plugging removal and it achieved the desired effect.Pilot tunnel excavation blasting increased free surface for temporary plugging and provided enough space for favorable conditions of blasting once completely.Engineering practice proved that the pilot tunnel excavation combined with wedge cut design could provide a reference for similar engineering designs.

关键词(KeyWords)： 爆破;楔形掏槽;堵塞;临时堵塞;导流洞;大坝
Blasting;Wedge slotting;Plugging;Temporary plugging;Diversion tunnel;Dam

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 蒋文斌;赵自奇;刘士兵;傅建莉;郑永泽;
JIANG Wen-bin;ZHAO Zi-qi;LIU Shi-bing;FU Jian-li;ZHENG Yong-ze;Hunan Nanling Explosive Engineering Co.,Ltd.;Hunan Water Conservancy and Hydropower Construction Group Co.,Ltd.;

参考文献(References)：

• [1]刘美山,余强,王缪斯,等.贵州塘寨电厂取水口岩塞爆破[J].工程爆破,2011,17(4):36-40.LIU Mei-shan,YU Qiang,WANG Miu-si,et al.Rock plug blasting of water inlet at Tangzhai power plant in Guizhou Province[J].Engineering Blasting,2011,17(4):36-40.
• [2]梁朝军.王快水库渠首引水隧洞岩塞爆破[J].工程爆破,2013,19(1-2):57-59.LIANG Chao-jun.Rock plug blasting of diversion tunnel in canal head of Wangkuai reservoir[J].Engineering Blasting,2013,19(1-2):57-59.
• [3]刘美山,李永池,张正宇,等.洪家渡水电站2号导流洞进水口岩埂爆破拆除[J].工程爆破,2004,10(1):22-25.LIU Mei-shan,LI Yong-chi,ZHANG Zheng-yu,et al.Blasting demolition of rock-dyke at inlet of No.2waterdiversion tunnel in Hongjiadu hydropower station[J].Engineering Blasting,2004,10(1):22-25.
• [4]黄绍钧,郝志信.水下岩塞爆破技术[M].北京:水利电力出版社,1993.HUANG Shao-jun,HAO Zhi-xin.Underwater rock plug blasting technology[M].Beijing:Water&Power Press,1993.
• [5]杨国全,吴政江.花溪水库扩建工程泄洪隧洞水下岩塞爆破设计与施工[J].贵州水力发电,2007,21(4):64-66.YANG Guo-qian,WU Zheng-jiang.Design&construction of blasting for rock plug underwater of spillway tunnel of huaxi reservoir extension project[J].Guizhou Water Power,2007,21(4):64-66.
• [6]GB 6722-2014爆破安全规程[S].北京:中国标准出版社,2014.GB 6722-2014Safety regulations for blasting[S].Beijing:China Standards Press,2014.