中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (11): 89-95.doi: 10.16265/j.cnki.issn1003-3033.2019.11.015

• 安全工程技术科学 • 上一篇    下一篇

新建隧道爆破对临近隧道振动特性的影响研究

吴波1,2 教授, 兰扬斌1,2, 杨建新3 教授级高工, 韩亚龙3, 庞晓瑜3   

  1. 1 广西大学 土木建筑工程学院,广西 南宁 530004;
    2 广西大学 工程防灾与结构安全教育部重点实验室,广西 南宁 530004;
    3 中铁十局集团第五工程有限公司,江苏 苏州 215011
  • 收稿日期:2019-08-19 修回日期:2019-10-18 发布日期:2020-10-30
  • 作者简介:吴 波 (1971—),男,四川阆中人,博士,教授,主要从事隧道及地下工程方面的教学与研究工作。E-mail: 813792833@qq.com。
  • 基金资助:
    国家自然科学基金面上项目资助(51678164, 51478118);广西特聘专家专项资金(20161103);广西自然科学基金资助(2018GXNSFDA138009)。

Influence of new tunnel blasting on vibration characteristics of adjacent existing tunnel

WU Bo1,2, LAN Yangbin1,2, YANG Jianxin3, HAN Yalong3, PANG Xiaoyu3   

  1. 1 College of Civil Engineering and Architecture, Guangxi University, Nanning Guangxi 530004, China;
    2 Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning Guangxi 530004, China;
    3 The Fifth Engineering Co., Ltd. of China Railway 10th Bureau Group, Suzhou Jiangsu 215011, China
  • Received:2019-08-19 Revised:2019-10-18 Published:2020-10-30

摘要: 为保证既有杭深铁路在临近隧道爆破施工时的安全运营,考虑既有运营隧道衬砌的支护作用,结合现场监测和数值模拟的方法,研究既有运营隧道衬砌在临近新建隧道爆破动力荷载作用下的振动特性及应力分布特征,采用FLAC3D数值模拟隧道爆破对既有运营隧道的影响,同时简要评估现场所用爆破方案的安全性,并给出相应的控爆措施。结果表明:新建隧道爆破施工时,既有运营隧道衬砌迎爆侧拱腰处的振速相对拱脚处较大,且拱腰处径向振速较大;新建隧道工作面后方已成洞区对应的既有运营隧道衬砌振速相对未成洞区较大;爆破荷载作用下运营隧道拱腰处衬砌应力值最大;爆破会对运行中的列车产生影响,应减小开挖进尺或选择在列车停运时段施工。

关键词: 既有隧道, 爆破施工, 现场监测, 数值模拟, 振动特性

Abstract: In order to ensure safe operation of existing Hangzhou-Shenzhen railway while adjacent tunnels under blasting construction, by using field monitoring and numerical simulation, study was conducted on vibration characteristics and stress distribution law of existing tunnel lining under blasting dynamic load of adjacent new tunnel. Then FLAC3D was adopted to simulate influence of blast on operating tunnels, safety of blasting scheme adopted in the field was briefly evaluated and corresponding explosion control measures were provided. The results show that during blasting construction of new tunnels, vibration velocity of arch waist of existing tunnel lining is larger than that of arch foot, and radial vibration velocity of arch waist is larger than that of other directions. Lining stress comes to maximum at arch waist of operating tunnels under blasting load and blasting will have an impact on running trains, so footage excavation shall be reduced or construction shall be carried out in periods when trains are not in operation.

Key words: existing tunnel, blasting construction, site monitoring, numerical simulation, vibration characteristics

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