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首页> 外文会议>Field measurements in geomechanics >Monitoring tunnel deformation induced by close-proximity bored tunnelingusing distributed optical fiber strain measurements
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Monitoring tunnel deformation induced by close-proximity bored tunnelingusing distributed optical fiber strain measurements

机译：使用分布式光纤应变测量监测近距离钻孔隧道引起的隧道变形

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摘要

The paper describes the use of optical fiber Brillouin Optical TimernDomain Reflectometry (BOTDR) to monitor the strain distribution in an existingrntunnel while a twin tunnel was bored at close-proximity. The twin circular boredrntunnels between Serangoon and Bartley stations on the new Circle Line Stage 3rnsubway in Singapore were constructed at close-proximity to avoid underpinning thernfoundations of adjacent buildings. The minimum clear separation of the two tunnelsrnis 2.3m (0.4 times the tunnel diameter). The Outer Tunnel was constructed first,rnfollowed by the Inner Tunnel, with the earth-pressure balance tunnel boringrnmachines maintained at a minimum of 100m apart. In this trial application ofrnBOTDR, the strain distribution along the Outer Tunnel was measured, in order tornmonitor its deformation due to the boring of the Inner Tunnel at close-proximity. Thernaim of the trial application was to determine the practicality of this monitoringrnmethod for future use in ‘live’ tunnels. This paper compares the measurementsrnobtained from optical fiber BOTDR with conventional methods of tunnel monitoringrnand describes preliminary installation and workmanship guidelines derived fromrnlessons learnt during this trial.
机译：本文介绍了使用光纤布里渊光学TimernDomain反射法（BOTDR）来监视双隧道在近邻钻孔时现有隧道中的应变分布。新加坡新的Circle Line Stage 3rnsubway的实龙岗站和巴特利站之间的双圆形钻孔隧道是近距离建造的，以避免支撑相邻建筑物的基础。两个隧道的最小净间距为2.3m（隧道直径的0.4倍）。首先建造外部隧道，然后是内部隧道，其土压力平衡隧道掘进机之间的距离至少保持100m。在rnBOTDR的此试验应用中，测量了沿外隧道的应变分布，以便监测由于近距离内隧道的钻孔而引起的变形。该试用应用程序的目的是确定该监控方法的实用性，以备将来在“活动”隧道中使用。本文将从光纤BOTDR获得的测量结果与传统的隧道监测方法进行了比较，并描述了从本次试验中学到的经验教训得出的初步安装和工艺准则。

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  • 来源
  • 会议地点 Boston MA(US);Boston MA(US)
  • 作者

    Hisham Mohamad; Peter J. Bennett; Kenichi Soga; Robert J. Mair; rnChi-Sharn Lim; Christopher K. Knight-Hassell; Chun Nam Ow;

  • 作者单位

    High Cross Site, Madingley Road, Cambridge University, Cambridge, CB3 0EL, UK,rnhm327@cam.ac.uk;

    rnHigh Cross Site, Madingley Road, Cambridge University, Cambridge,rnCB3 0EL, UK, pjb65@cam.ac.uk;

    rnCambridge University Engineering Department, Trumpington Street, Cambridge CB2 1PZ,rnUK, ks207@cam.ac.uk;

    rnCambridge University Engineering Department, Trumpington Street, Cambridge CB2rn1PZ, UK, rjm50@cam.ac.uk;

    rnLand Transport Authority, No. 1 Hampshire Road, Singapore 219428,rnchi_sharn_lim@lta.gov.sg;

    rnLand Transport Authority, No. 1 Hampshire Road, Singapore 219428,rnchristopher_knight_hassell@lta.gov.sg;

    rnLand Transport Authority, No. 1 Hampshire Road, Singapore 219428,rnchun_nam_ow@lta.gov.sg;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地磁学;
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