卵砾石层中隧道考虑松动圈的位移反分析应用
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摘要
研究了考虑围岩松动圈的位移反分析在卵砾石层隧道工程中的应用。由于江苏省常宁高速公路茅山隧道大部分处于卵砾石地层中,围岩稳定性差,隧道埋深浅,必须采用隧道信息化施工。为了确保隧道施工的安全进行,将隧道简化为平面应变问题,实现了位移反分析计算,采用考虑围岩松动圈的双介质模型,反演松动圈的弹性模量。然后利用有限元法,对隧道动态施工过程进行了仿真数值模拟研究,并将计算分析结果反馈设计和施工,进而调整设计,指导施工,确保了工程的安全施工。
This paper presents the application of displacement back analysis for the tunnel engineering in gravel-cobble stratum taking the loosing zone into consideration.Because the Maoshan tunnel is mostly located in gravel-cobble stratum,the information construction has to be conducted in the tunnel construction in Changning highway,Jiangsu Province.This tunnel has a shallow embedment and the stability of the adjoining rock is under bad conditions.In order to ensure the security of the tunnel construction,the back analysis of displacement is carried out.The three-dimensional model of the tunnel excavation is simplified into the plane strain problem.Taking into account the loosing zone of adjoining rock,the two-medium model is adopted in the computation.The elastic modulus of the loosing zone is used to process the normal analysis in the supervision of the tunnel construction.Then,the dynamic simulation of the construction process has been conducted by finite element method.Thus,the feedback design has been realized and the construction safety has been under control.
This paper presents the application of displacement back analysis for the tunnel engineering in gravel-cobble stratum taking the loosing zone into consideration.Because the Maoshan tunnel is mostly located in gravel-cobble stratum,the information construction has to be conducted in the tunnel construction in Changning highway,Jiangsu Province.This tunnel has a shallow embedment and the stability of the adjoining rock is under bad conditions.In order to ensure the security of the tunnel construction,the back analysis of displacement is carried out.The three-dimensional model of the tunnel excavation is simplified into the plane strain problem.Taking into account the loosing zone of adjoining rock,the two-medium model is adopted in the computation.The elastic modulus of the loosing zone is used to process the normal analysis in the supervision of the tunnel construction.Then,the dynamic simulation of the construction process has been conducted by finite element method.Thus,the feedback design has been realized and the construction safety has been under control.
引文
[1]杨志法,王思敬,冯紫良,刘桓恒.岩土工程反分析原理及应用[M].地震出版社,2002.(YANG Zhifa,WANG Shijing,FENG Ziliang,LIUHuanheng.Princi-ple and application of geotechnical engineering back a-nalysis[M].Seismic Press,2002.(in Chinese))
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[6]朱合华,杨林德,桥正本.深基坑工程动态施工反演分析与变形预报[J].岩土工程学报,1998,20(4):33-38.(ZHU Hehua,YANG Linde,Back analysis ofdynamic construction and deformation forecast of deepfoundation work[J].Chinese Journal of GeotechnicalEngineering,1998,20(4):33-38.(in Chinese))
[7]朱合华,崔茂玉,刘学增等.大型深基坑动态施工反演与稳定性分析[J].建筑结构学报.2000,21(6):74-79.(ZHU Hehua,CUI Mouyu,LIU Xuezeng etal.Backward analysis of Staged Construction of BigDeep Pit Foundation and Analysis of its Stability[J].Journal of Building Structures,2000,21(6):74-79.(in Chinese))
[8]朱合华,刘学增.软土深基坑粘弹性动态增量反演分析与变形预测[J].岩土力学.2000,21(4):381-384.(ZHU Hehua,LIU Xuezeng.Viscoelastic dy-namic incremental back analysis in soft soil pit founda-tion and deformation forecasting[J].Rock and Soil Me-chanics,2000,21(4):381-384.(in Chinese))
[9]Arai R.An inverse problems approach to the predictionof Multi-dimension consolidation behavior.Soil andFoundation,1984,24(1):95-108.
[10]贾颖绚,宋伟宏.巷道围岩松动圈测试技术与探讨[J].西部探矿工程,2004,16(10):148-150.(JIAYingxun,SONG Weihong.Measuring technique and in-vestigation of loosing ring of tunnel rock[J].West-Chi-na Exploration Engineering,2004,16(10):148-150(in Chinese))
[2]杨林德,朱合华等.岩土工程问题的反演理论与工程实践[M].上海:科学出版社,1996.(YANG Linde,ZHU Hehua et al.Theory and engineering practice ofback analysis on geotechnical problems[M].Shanghai:Science Press,1996.(in Chinese))
[3]王芝银.地下洞室考虑空间效应的增量反分析[J].西安矿业学院学报,1987,7(3):13-21.(WANGZhiyin.Incremental back analysis of underground cavityconsidering space effect[J].Journal of Xi'an Mining In-stitute,1987,7(3):13-21.(in Chinese))
[4]王芝银,李云鹏.地下工程围岩弹塑性参数反分析[J].水利学报,1990,(9):11-16.(WANG Zhiyin,LI Yunpeng.Back analysis of elasto-plastic parametersof surrounding rock in underground engineering[J].Journal of Water Resources,1990,(9):11-16.(inChinese))
[5]孙钧,黄伟.岩石力学参数弹塑性反演问题的优化方法[J].岩石力学与工程学报,1992,11(3):221-229.(SUN Jun,HUANG Wei.Optimization of back a-nalysis on elasto plasticity of rock mechanical parameters[J].Chinese Journal of Rock Mechanics and Engineer-ing,1992,11(3):221-229.(in Chinese))
[6]朱合华,杨林德,桥正本.深基坑工程动态施工反演分析与变形预报[J].岩土工程学报,1998,20(4):33-38.(ZHU Hehua,YANG Linde,Back analysis ofdynamic construction and deformation forecast of deepfoundation work[J].Chinese Journal of GeotechnicalEngineering,1998,20(4):33-38.(in Chinese))
[7]朱合华,崔茂玉,刘学增等.大型深基坑动态施工反演与稳定性分析[J].建筑结构学报.2000,21(6):74-79.(ZHU Hehua,CUI Mouyu,LIU Xuezeng etal.Backward analysis of Staged Construction of BigDeep Pit Foundation and Analysis of its Stability[J].Journal of Building Structures,2000,21(6):74-79.(in Chinese))
[8]朱合华,刘学增.软土深基坑粘弹性动态增量反演分析与变形预测[J].岩土力学.2000,21(4):381-384.(ZHU Hehua,LIU Xuezeng.Viscoelastic dy-namic incremental back analysis in soft soil pit founda-tion and deformation forecasting[J].Rock and Soil Me-chanics,2000,21(4):381-384.(in Chinese))
[9]Arai R.An inverse problems approach to the predictionof Multi-dimension consolidation behavior.Soil andFoundation,1984,24(1):95-108.
[10]贾颖绚,宋伟宏.巷道围岩松动圈测试技术与探讨[J].西部探矿工程,2004,16(10):148-150.(JIAYingxun,SONG Weihong.Measuring technique and in-vestigation of loosing ring of tunnel rock[J].West-Chi-na Exploration Engineering,2004,16(10):148-150(in Chinese))
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