TRT预报波速参数优化及其在贵州某岩溶隧道地质预报中的应用
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摘要
文章分析和讨论了TRT技术的基本原理,指出了TRT技术在隧道地质超前预报中的优缺点。根据目前TRT背景速度选取时存在的问题——背景波速的选取受人为因素影响较大而缺乏一定的客观性,提出了基于正态分布条件下的直达波速置信区间的计算方式,并以置信区间的上下界值分别作为背景波速参数录入TRT系统加以计算分析,一定程度上避免了人工选取的单一背景波速在岩溶隧道地质灾害预报中的局限性。同时,在进行TRT成果图像分析时,将图谱划分为三对色谱带进行解释分析,从而使对TRT成果图像的判读更具针对性。结合某岩溶隧道分段波速信息及现场地质资料进行了综合地质预报研究,验证了本文方法的准确性。
The basic principles of TRT technology are analyzed and discussed,and the advantages and disadvantages of TRT technology in tunnel geological forecasts are listed.Considering that the selection of TRT background wave velocity is greatly influenced by human factors and lacks objectivity,a calculation mode for the direct velocity confidence interval under a normal distribution is put forward.The upper and lower thresholds of the confidence interval were used as the background wave velocity parameters put into the TRT system for calculation and analysis,and to some extent this method avoids the limitations of a single background wave velocity selected manually for geological disaster forecasts in Karst tunnels.For analysis of the resulting TRT images,the map would be divided into three pairs of chromatographic bands to be interpreted and analyzed,and thereby the interpretation of the TRT images shall be more targeted.Based on the segmented wave velocity information and the geological field data of a certain Karst tunnel,a comprehensive geological forecast was conducted and the accuracy of this method was verified.
The basic principles of TRT technology are analyzed and discussed,and the advantages and disadvantages of TRT technology in tunnel geological forecasts are listed.Considering that the selection of TRT background wave velocity is greatly influenced by human factors and lacks objectivity,a calculation mode for the direct velocity confidence interval under a normal distribution is put forward.The upper and lower thresholds of the confidence interval were used as the background wave velocity parameters put into the TRT system for calculation and analysis,and to some extent this method avoids the limitations of a single background wave velocity selected manually for geological disaster forecasts in Karst tunnels.For analysis of the resulting TRT images,the map would be divided into three pairs of chromatographic bands to be interpreted and analyzed,and thereby the interpretation of the TRT images shall be more targeted.Based on the segmented wave velocity information and the geological field data of a certain Karst tunnel,a comprehensive geological forecast was conducted and the accuracy of this method was verified.
引文
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[10]席锦州,周捷.TRT6000超前地质预报系统在新铜锣山隧道中的运用[J].现代隧道技术,2012,49(5):137-141.XI Jinzhou,ZHOU Jie.Application of the TRT6000 Geological Prediction System in the Construction of the New Tongluoshan Tunnel[J].Modern Tunnelling Technology,2012,49(5):137-141.
[11]赵永贵.国内外隧道超前预报技术评析与推介[J].地球物理学进展,2007,22(4):1344-1352.ZHAO Yonggui.Analysis and Recommendation of Tunnel Prediction Techniques at Home and Abroad[J].Progress in Geophysics,2007,22(4):1344-1352.
[12]刘杰,廖春木.TRT技术在隧道地质超前预报中的应用[J].铁道建筑,2011,(4):77-79.LIU Jie,LIAO Chunmu.Application of TRT(Tunnel Reflection Tomography)in Tunnel Advanced Geological Prediction[J].Railway Engineering,2011,(4):77-79.
[13]肖启航,谢朝娟.TST技术在岩溶地区隧道超前预报中的应用[J].岩土力学,2012,33(5):1416-1420.XIAO Qihang,XIE Chaojuan.Application of Tunnel Seismic Tomography to Tunnel Prediction in Karst Area[J].Rock and Soil Mechanics,2012,33(5):1416-1420.
[2]康勇,杨春和,张朋.浅埋岩溶隧道灾变机制及其防治[J].岩石力学与工程学报,2010,29(1):149-154.KANG Yong,YANG Chunhe,ZHANG Peng.Disaster—Induced Mechanism and Its Treatment in Shallow-Buried Karst Tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(1):149-154.
[3]刘国,李焯均,沈卫东.综合超前地质预报在长乐山隧道施工中的应用[J].现代隧道技术,2011,48(1):123-127.LIU Guo,LI Zhuojun,SHEN Weidong.Integrated Advance Geologic Prediction Applied in Changleshan Tunnel[J].Modern Tunnelling Technology,2011,48(1):123-127.
[4]白明洲,杜永强,赵西民.等.宜万铁路齐岳山隧道地质水平钻探应用技术[J].探矿工程(岩土钻掘工程),2006,33(4):59-61.BAI Mingzhou,DU Yongqiang,ZHAO Ximin,et al.Study on Application Technology of Geology Horizontal Drilling in Qiyueshan Tunnel at Yiwan Railway[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2006,33(4):39-61.
[5]薛翊国,李术才,张庆松,等.隧道信息化施工岩溶裂隙水超前地质预报[J].岩土力学,2008,29(12):3360-3364.XUE Yiguo,LI Shucai,ZHANG Qingsong,et al.Geological Prediction of Karst-Fractured Groundwater in Tunnel Informational Construction[J].Rock and Soil Mechanics,2008,29(12):3360-3364.
[6]黄雄军.宜万铁路马鹿箐隧道+978溶腔预测预报[J].现代隧道技术,2011,48(1):128-132.HUANG Xiongjun.Geological Forecast for Cavity at+978 of Malujing Tunnel on Yichang-Wanzhou Railway[J].Modern Tunnelling Technology,2011,48(1):128-132.
[7]王晓川,康勇,夏彬伟.对提高TGP隧道地质预报系统准确性的分析[J].物探与化探,2012,36(1):153-158.WANG Xiaochuan,KANG Yong,XIA Binwei.An Analysis of Accuracy Improvement for TGP Tunnel Geological Prediction System[J].Geophysical and Geochemical Exploration,2012,36(1):153-158.
[8]邱道宏,李术才,张乐文,等.基于TSP203系统和GA-SVM的围岩超前分类预测[J].岩石力学与工程学报,2010,29(增1):3221-3226.QIU Daohong,LI Shucai,ZHANG Lewen,et al.Prediction of Surrounding Rock Classification in Advance Based on TSP203 System and GA-SVM[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(S1):3221-3226.
[9]肖启航,谢朝娟.TST技术在贵州高速公路顶效隧道超前地质预报中的应用[J].工程勘察,2010,38(7):89-94.XIAO Qihang,XTE Chaojuan.Application of TST Approach to the Advanced Geological Prediction for Dingxiao Tunnel in Guizhou Highway[J].Journal of Geotechnical Investigation&Surveying,2010,38(7):89-94.
[10]席锦州,周捷.TRT6000超前地质预报系统在新铜锣山隧道中的运用[J].现代隧道技术,2012,49(5):137-141.XI Jinzhou,ZHOU Jie.Application of the TRT6000 Geological Prediction System in the Construction of the New Tongluoshan Tunnel[J].Modern Tunnelling Technology,2012,49(5):137-141.
[11]赵永贵.国内外隧道超前预报技术评析与推介[J].地球物理学进展,2007,22(4):1344-1352.ZHAO Yonggui.Analysis and Recommendation of Tunnel Prediction Techniques at Home and Abroad[J].Progress in Geophysics,2007,22(4):1344-1352.
[12]刘杰,廖春木.TRT技术在隧道地质超前预报中的应用[J].铁道建筑,2011,(4):77-79.LIU Jie,LIAO Chunmu.Application of TRT(Tunnel Reflection Tomography)in Tunnel Advanced Geological Prediction[J].Railway Engineering,2011,(4):77-79.
[13]肖启航,谢朝娟.TST技术在岩溶地区隧道超前预报中的应用[J].岩土力学,2012,33(5):1416-1420.XIAO Qihang,XIE Chaojuan.Application of Tunnel Seismic Tomography to Tunnel Prediction in Karst Area[J].Rock and Soil Mechanics,2012,33(5):1416-1420.
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