测绘通报 ›› 2017, Vol. 0 ›› Issue (9): 83-87,115.doi: 10.13474/j.cnki.11-2246.2017.0293

• 技术交流 • 上一篇    下一篇

三维激光扫描技术在米仓山特长隧道施工中的可行性应用研究

刘欢1,2, 王立娟1,2, 裴尼松1,2, 赵鹏1,2, 马松1,2, 肖梦1,2   

  1. 1. 四川省安全科学技术研究院, 四川 成都 610045;
    2. 重大危险源测控四川省重点实验室, 四川 成都 610045
  • 收稿日期:2017-03-01 出版日期:2017-09-25 发布日期:2017-10-12
  • 作者简介:刘欢(1985-),男,硕士,研究方向为三维,激光扫描技术及其应用.E-mail:liuhuanraul@126.com
  • 基金资助:
    国防科工局产业化应用项目(87-Y40G06-9001-15/18);四川省科技厅国际合作计划项目(2017HH0085);四川省安全生产科技项目(scaqjgjc_stp_201613/14/17/27,aj20170518194207)。

The Application of Three-dimensional Laser Scanning Technology in Micangshan Extra-long Tunnel Construction

LIU Huan1,2, WANG Lijuan1,2, PEI Nisong1,2, ZHAO Peng1,2, MA Song1,2, XIAO Meng1,2   

  1. 1. Sichuan Academy of Safety Science and Technology, Chengdu 610045, China;
    2. Major Hazard Measurement and Control Key Laboratory of Sichuan Province, Chengdu 610045, China
  • Received:2017-03-01 Online:2017-09-25 Published:2017-10-12

摘要: 巴陕高速米仓山特长隧道为我国目前在建最长公路隧道,全长约13.8km。利用三维激光扫描技术高速率、高精度获取对象表面三维坐标的优势,对米仓山隧道LJ2标段右线施工过程中的超欠挖、二衬厚度、掘进面爆破效果进行了检测,并对开挖断面围岩周边收敛和拱顶下沉进行了变形监测。结果表明,检测段隧道超挖区域比例占到81%,其中超挖0~20cm的占62%,欠挖0~10cm的为14%;二衬厚度选取不同里程、相同位置121个位置进行分析,最大厚度0.662m,最小0.456m,平均厚度0.564m;掘进面爆破深度约为3.048m,爆破方量为254.065m3;K54+030断面围岩周边收敛6d最大收敛变形量为9.5mm,拱顶下沉监测点6d最大变形量为5mm。

关键词: 三维激光扫描技术, 米仓山特长隧道, 超欠挖, 二衬厚度, 爆破效果, 周边收敛, 拱顶下沉

Abstract: Micangshan extra-long tunnel is the longest highway tunnel under construction in China with the total length of 13.8 km.3D laser scanning technology has the advantages of high-speed and high-precision to obtain the surface of the objects' three-dimensional coordinates.The technology is used to monitoring and analyzing the tunnel's overbreak-shortbreak, thickness of secondary lining,blasting effect of tunnel face,rock's deformation of circumjacent convergence and vault settlement.The results showed that tunnel's overbreak area is accounted for 81%,0~20 cm overbreak area is accounted for 62%,0~10 cm shortbreak area is accounted for 14% in the experimental section;the biggest,smallest and average thickness of secondary lining are 0.662,0.456 and 0.564 m respectively;blasting depth of tunnel face is about 3.048 m and the rock volume is 254.065 m3;maximum circumjacent convergence deformation and vault settlement are 9.5 mm and 5 mm in K54+030 section during 6 days.

Key words: 3D laser scanning technology, Micangshan extra-long tunnel, overbreak-shortbreak, thickness of secondary lining, blasting effect, circumjacent convergence, vault settlement

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