综合地质预报在某隧道明洞探测中的应用
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摘要
隧道出洞口附近易出现塌方、冒顶等地质灾害,为防止这类灾害的发生,施工前必须对隧道前方地质情况做出准确判断.文章分别介绍了隧道地震波法(tunnel seismic prediction,TSP)和地质雷达法(ground pener rating radar,GPR)两种常用的地质预报方法,并综合应用这两种方法对某隧道明洞段进行了探测.根据超前地质预报的探测结果,确定地面冲沟所在位置及掌子面前方岩体含水情况,并做出该区域不会揭露明洞的判断;同时结合地质雷达对拱顶进行连续跟踪探测,得到了顶板的厚度.最后,探测结果与实际开挖情况进行了对比验证.通过综合地质预报的手段,能够较准确的探明掌子面前方的地质情况,指导工程施工.
Collapse or roof fall usually occurs at the open-cut part.To solve this problem,comprehensive geological prediction is necessary. The basic principles of two widely used geological prediction methods(TSP and GPR) were introduced.These two methods were applied in detection of an opencut tunnel.The basic position of the gully and the water cut condition were determined according to advanced geology prediction using TSP203.An opposite conclusion was obtained that opencut tunnel would not show here.In addition,the thickness of bedrock was tracking detected using GPR,and a comparasion with the excavation was given.
Collapse or roof fall usually occurs at the open-cut part.To solve this problem,comprehensive geological prediction is necessary. The basic principles of two widely used geological prediction methods(TSP and GPR) were introduced.These two methods were applied in detection of an opencut tunnel.The basic position of the gully and the water cut condition were determined according to advanced geology prediction using TSP203.An opposite conclusion was obtained that opencut tunnel would not show here.In addition,the thickness of bedrock was tracking detected using GPR,and a comparasion with the excavation was given.
引文
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[2]张庆松,李术才,孙克国,等.公路隧道超前地质预报应用现状与技术分析[J].地下空间与工程学报,2008,4(4):766-771.ZHANG Qingsong,LI Shucai,SUN Keguo,et al.Analysisand present state of advanced geological forecast technology ofhighway tunnel[J].Chinese Journal of Underground Space andEngineering,2008,4(4):766-771.
[3]林传年.岩溶隧道综合超前地质预报应用研究[J].地下空间与工程学报,2008,4(6):1086-1090.LIN Chuannian.Research on application of comprehensive ad-vanced prediction for karst tunnels[J].Chinese Journal of Un-derground Space and Engineering,2008,4(6):1086-1090.
[4]孙克国,李术才,张庆松,等.TSP在岩溶区山岭隧道预报中的应用研究[J].山东大学学报:工学版,2008,38(1):74-79.SUN Keguo,LI Shucai,ZHANG Qingsong,et al.Applicationof the TSP geological forecast method of a mountain tunnel in akarst zone[J].Journal of Shandong University:EngineeringScience,2008,38(1):74-79.
[5]周黎明,尹健民,侯炳绅,等.弹性波反射法在地质超前预报中的应用分析[J].长江科学院院报,2008,25(1):61-64.ZHOU Liming,YIN Jianmin,HOU Bingshen,et al.Applica-tion of elastic wave reflection method in geologic advanced pre-diction[J].Journal of Yangtze River Scientific Research Insti-tute,2008,25(1):61-64.
[6]李大心.地质雷达方法与应用[M].北京:地质出版社,1994.LI Daxin.GPR and its application[M].Beijing:GeologicalPublishing House,1994.
[7]许振浩,李术才,张庆松,等.TSP超前地质预报地震波反射特性研究[J].地下空间与工程学报,2008 4(4):640-644.XU Zhenhao,LI Shucai,ZHANG Qingsong,et al.Reflectioncharacteristic of seismic wave in TSP advance geological predic-tion[J].Chinese Journal of Underground Space and Engineer-ing,2008,4(4):640-644.
[8]薛诩国,李术才,张庆松,等.TSP203超前预报系统探测岩溶隧道的应用研究[J].地下空间与工程学报,2007,3(7):1187-1191.XUE Yiguo,LI shucai,ZHANG qingsong,et al.Applicationof TSP203 advanced prediction to tunnel in karst areas[J].Chinese Journal of Underground Space and Engineering,2007,3(7):1187-1191.
[9]刘传孝.地质雷达空洞探测机理研究及应用实例分析[J].岩石力学与工程学报,2000,19(2):238-241.LIU Chuanxiao.Research on the mechanism of probing cavitywith ground penetrating radar and analysis on application exam-ples[J].Chinese Journal of Rock Mechanics and Engineering,2000,19(2):238-241.
[9]曲海锋,刘志刚,朱合华.隧道信息化施工中综合超前地质预报技术[J].岩石力学与工程学报,2006,25(6):1246-1251.QU Haifeng,LIU Zhigang,ZHU Hehua.Technique of synthet-ic geologic prediction ahead in tunnel informational construction[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(6):1246-1251.
[10]王锦山,王力,曹志刚,等.厦门海底隧道综合超前地质预报实践[J].岩石力学与工程学报,2007,26(11):2309-2317.WANG Jinshan,WANG Li,CAO Zhigang,et al.Practice onsynthetic geological prediction ahead of construction of Xiamensubsea tunnel[J].Chinese Journal of Rock Mechanics andEngineering,2007,26(11):2309-2317.
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