王新明;
WANG Xin-ming;China Railway Eleventh Bureau Group Co., Ltd.;

• 1:中铁十一局集团有限公司

摘要(Abstract)：

为了顺利完成地铁区间四线大断面爆破开挖,减小爆破作业对城市环境的影响,利用TBM导洞扩挖形成既有临空面,采用水压爆破施工技术,通过质点振速的理论计算与现场起爆试验结果,优化了爆破参数和起爆网路,进而降低了质点爆破振速,完成了区间大断面开挖,减小了爆破对周边环境的影响。结果表明:相比于常规爆破技术,本工程的水压爆破方案每循环节省了炸药39.91 kg,每循环进尺提高了0.35 m,大块率降低了53%,质点爆破振速下降了0.13 cm/s,粉尘浓度下降了36.6 mg/m³,经济与环境效益显著。
In order to successfully complete the large section blasting excavation of a 4-line metro section and reduce the impact of blasting operation on the urban environment, the TBM pilot tunnel was expanded to form the existing free face. The hydraulic blasting construction technology is applied. Through theoretical calculation of particle vibration velocity and field initiation test results, the blasting parameters and initiation network are optimized to reduce the particle blasting vibration velocity. The large section excavation is completed, and the blasting impact on the surrounding environment is reduced. The results show that compared with conventional blasting technology, the hydraulic blasting scheme of this project saves 39.91 kg of explosives per cycle, increases the footage by 0.35 m per cycle, reduces the bulk rate by 53 %, and decreased the particle blasting vibration velocity by 0.13 cm/s and the dust concentration by 36.6 mg/m3,经济与环境效益显著。
In order to successfully complete the large section blasting excavation of a 4-line metro section and reduce the impact of blasting operation on the urban environment, the TBM pilot tunnel was expanded to form the existing free face. The hydraulic blasting construction technology is applied. Through theoretical calculation of particle vibration velocity and field initiation test results, the blasting parameters and initiation network are optimized to reduce the particle blasting vibration velocity. The large section excavation is completed, and the blasting impact on the surrounding environment is reduced. The results show that compared with conventional blasting technology, the hydraulic blasting scheme of this project saves 39.91 kg of explosives per cycle, increases the footage by 0.35 m per cycle, reduces the bulk rate by 53 %, and decreased the particle blasting vibration velocity by 0.13 cm/s and the dust concentration by 36.6 mg/m³, which reveals that the significant economic and environmental benefits of this technology.

关键词(KeyWords)： 水压爆破;TBM法;临空面;起爆网路;爆破振速;大断面
water pressure blasting;TBM method;free face;initiation network;blasting vibration velocity;large cross section

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划资助项目(2017YFB1302600)

作者(Authors): 王新明;
WANG Xin-ming;China Railway Eleventh Bureau Group Co., Ltd.;

DOI: 10.19931/j.EB.20200089

参考文献(References)：

• [1] 陈文尹.分区组合爆破在硬岩暗挖地铁车站中的应用[J].工程爆破，2017,23(1):85-88.CHEN W Y.Application of subarea combined blasting in hard rock underground excavation subway station[J].Engineering Blasting,2017,23(1):85-88.
• [2] 张卫彪.闹市区大断面地铁车站钻爆开挖及振动控制[J].现代隧道技术，2019,56(1):185-191.ZHANG W B.Drill-blast excavation and vibration control of the large-section metro station in urban areas[J].Modern Tunnelling Technology,2019,56(1):185-191.
• [3] 付晓强，雷振，刘幸，等.城市浅埋隧道下穿密集建筑群控制爆破技术[J].科学技术与工程，2019,19(2):223-227.FU X Q,LEI Z,LIU X,et al.Controlled blasting technology of shallow tunnels crossing underneath intensive existing buildings in urban area[J].Science Technology and Engineering,2019,19(2):223-227.
• [4] 王立川，陈海勇，王占军，等.对隧道TBM导洞扩挖法施工的探讨与展望[J].隧道建设，2015,35(2):149-159.WANG L C,CHEN H Y,WANG Z J,et al.Discussion and prospects on TBM pilot-heading and enlarging method[J].Tunnel Construction,2015,35(2):149-159.
• [5] 张庆彬，阳军生，吴从师，等.上覆岩土条件下孤石爆破预处理炸药单耗实验[J].爆炸与冲击，2016,36(5):695-702.ZHANG Q B,YANG J S,WU C S,et al.Unit consumption experiment of explosive for pretreatment of boulder blasting under overlying rock and soil conditions[J].Explosion and Shock Waves,2016,36(5):695-702.
• [6] 李启月，边志伟，郑静，等.预留光爆层水压爆破在大断面公路隧道施工中降低爆破危害的应用[J].矿冶工程，2019,39(5):1-5.LI Q Y,BIAN Z W,ZHENG J,et al.Application of water pressure blasting with a reserved smooth blasting layer in the construction of large-section highway tunnel for mitigating blasting impacts[J].Mining and Metallurgical Engineering,2019,39(5):1-5.
• [7] 四川省住房和城乡建设厅.民用建筑可靠性鉴定标准：GB 50292-2015[S].北京：中国建筑工业出版社，2016.Sichuan Provincial Department of Housing and Urban-Rural Development.Standard for appraisal of reliability of civil buildings:GB 50292-2015[S].Beijing:China Architecture & Building Press,2016.
• [8] 何广沂，张进增，王树成，等.隧道聚能水压光面爆破新技术[M].北京：中国铁道出版社，2018.HE G Q,ZHANG J Z,WANG S C,et al.New technology of tunnel shaped charge hydraulic pressure smooth blasting [M].Beijing:China Railway Publishing House,2018.
• [9] 刘海波，白宗河，刘学攀，等.隧道掘进聚能水压光面爆破新技术与应用[J].工程爆破，2017,23(1):81-84.LIU H B,BAI Z H,LIU X P,et al.New technology application of tunnel excavation shaped hydraulic smooth blasting[J].Engineering Blasting,2017,23(1):81-84.
• [10] 许海亮，张继春，杨红，等.钻孔爆破振动速度计算公式及其简化的探讨[J].同济大学学报(自然科学版),2007(7):899-903,914.XU H L,ZHANG J C,YANG H,et al.Investigation on calculating formula of vibration velocity in drilling blasting and its simplification[J].Journal of Tongji University(Natural science),2007(7):899-903,914.