基于围岩松动圈的地下工程参数场位移反分析
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摘要
受爆破松动影响,地下洞室开挖后围岩强度会有所降低,根据松动损伤程度将其视为一个连续的三维"参数场"。由围岩松动圈的形成机制,分析地下洞室开挖后松动圈的计算方法,提出考虑松动圈的围岩参数场增量位移反分析法。针对岩土工程反分析计算量巨大的实际问题,对反演计算过程进行了基于MPI的主从式并行框架改进,运用计算机集群网络进行并行计算,减少了迭代计算次数和计算耗时,极大地提高了计算效率。通过对溪洛渡水电站右岸地下厂房的参数反演,得到了较好的反演效果,验证了此法的可行性和合理性。依据反演得到的参数场对现有支护设计及洞室围岩稳定状态进行评价,并对后续开挖进行预测,为工程设计施工提出合理建议,为地下工程参数反演提供了一种新方法和新思路。
Due to excavation blasting,the surrounding rock of underground caverns is loosened and its strength lowers.A continuous three-dimensional data field of surrounding rock parameters is employed to describe the different damage degrees of surrounding rock.According to the formation mechanism of excavation damaged zone(EDZ) of surrounding rock,the method to calculate the EDZ induced by excavation blasting in underground caverns is analyzed.By taking the range of EDZ into consideration,a back analysis method based on incremental displacements is put forward.By employing this method,the fields of surrounding rock parameters can be back analyzed.As back analysis of geotechnical engineering involves enormous amounts of computation,the back analysis process is improved by introducing message passing interface(MPI)-based master-slave parallel framework.The parallel computation can be conducted using computer cluster networks,thus considerably reduce the cost and enhance the efficiency of computation.The proposed method is further illustrated with its application to the large-scale underground caverns of Xiluodu hydropower station.The back analysis results are favorable and the reliability and rationality of the proposed method are proven.Based on the surrounding rock parameters field obtained by back analysis,the current anchor support scheme and the stability of the underground cavern are assessed.Also,the stability condition in subsequent excavation is predicted;and the rational recommendations are made for the engineering design and construction,providing the parameters back analysis of underground engineering with a new method.
Due to excavation blasting,the surrounding rock of underground caverns is loosened and its strength lowers.A continuous three-dimensional data field of surrounding rock parameters is employed to describe the different damage degrees of surrounding rock.According to the formation mechanism of excavation damaged zone(EDZ) of surrounding rock,the method to calculate the EDZ induced by excavation blasting in underground caverns is analyzed.By taking the range of EDZ into consideration,a back analysis method based on incremental displacements is put forward.By employing this method,the fields of surrounding rock parameters can be back analyzed.As back analysis of geotechnical engineering involves enormous amounts of computation,the back analysis process is improved by introducing message passing interface(MPI)-based master-slave parallel framework.The parallel computation can be conducted using computer cluster networks,thus considerably reduce the cost and enhance the efficiency of computation.The proposed method is further illustrated with its application to the large-scale underground caverns of Xiluodu hydropower station.The back analysis results are favorable and the reliability and rationality of the proposed method are proven.Based on the surrounding rock parameters field obtained by back analysis,the current anchor support scheme and the stability of the underground cavern are assessed.Also,the stability condition in subsequent excavation is predicted;and the rational recommendations are made for the engineering design and construction,providing the parameters back analysis of underground engineering with a new method.
引文
[1]杨志法,王思敬,冯紫良,等.岩土工程反分析原理及应用[M].北京:地震出版社,2002.(YANG Zhifa,WANG Sijing,FENG Ziliang,et al.Theory and application of back analysis in geotechnical engineering[M].Beijing:Earthquake Press,2002.(in Chinese))
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[7]刘世君,徐卫东,王红春.不确定性岩石力学参数的区间反分析[J].岩石力学与工程学报,2004,23(6):885-888.(LIU Shijun,XU Weiya,WANG Hongchun.Interval back analysis of uncertain parameters in rock mechanics[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(6):885-888.(in Chinese))
[8]章光,朱维申.参数敏感性分析与试验方案优化[J].岩土力学,1993,14(1):51-57.(ZHANG Guang,ZHU Weishen.Parameter sensitivity analysis and optimizing for test programs[J].Rock and Soil Mechanics,1993,14(1):51-57.(in Chinese))
[9]黄书岭,冯夏庭,张传庆.岩体力学参数的敏感性综合评价分析方法研究[J].岩石力学与工程学报,2008,27(增1):2624-2630.(HUANG Shuling,FENG Xiating,ZHANG Chuanqing.Study of method of comprehensive evaluation for parameters of constitutive model of rock mass[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(Supp.1):2624-2630.(in Chinese))
[10]张继勋,姜弘道,任旭华.岩体参数对隧洞围岩稳定性影响的敏感性分析[J].采矿与安全工程学报,2006,23(2):169-172.(ZHANG Jixun,JIANG Hongdao,REN Xuhua.Sensitivity analysis of mechanical parameters influencing stabilization of surrounding rocks of tunnel[J].Journal of Mining and Safety Engineering,2006,23(2):169-172.(in Chinese))
[11]俞裕泰,肖明.大型地下洞室围岩稳定三维弹塑性有限元分析[J].岩石力学与工程学报,1987,6(1):47-56.(YU Yutai,XIAO Ming.Three-dimensional elastoplastic finite element analysis for the surrounding rock stability of large-scale underground openings[J].Chinese Journal of Rock Mechanics and Engineering,1987,6(1):47-56.(in Chinese))
[12]肖明.地下洞室施工开挖三维动态过程数值模拟分析[J].岩土工程学报,2000,22(4):421-425.(XIAO Ming.Three-dimensional numerical model of construction process for underground opening[J].Chinese Journal of Geotechnical Engineering,2000,22(4):421-425.(in Chinese))
[13]邹海,王桂梁,桂和荣,等.岩体力学参数的损伤——反分析优化性研究[J].长春科技大学学报,1999,29(2):167-170.(ZOU Hai,WANG Guiliang,GUI Herong,et al.The damage-back analysis study of rock mechanics parameter[J].Journal of Changchun University of Science and Technology,1999,29(2):167-170.(in Chinese))
[14]肖明.地下洞室围岩稳定三维有限元数值分析方法[博士学位论文][D].武汉:武汉大学,2002.(XIAO Ming.Study on numerical analysis method of stability and supporting for underground caverns[Ph.D.Thesis][D].Wuhan:Whuhan University,2002.(in Chinese))
[15]张玉军,刘谊平.正交各向异性岩体中地下洞室稳定的黏弹-黏塑性三维有限元分析[J].岩土力学,2002,23(3):278-283.(ZHANG Yujun,LIU Yiping.3D viscoelastic-viscoplastic finite element analysis for stability of underground opening in orthotropic rock mass[J].Rock and Soil Mechanics,2002,23(3):278-283.(in Chinese))
[16]肖明,刘志明.锦屏二级水电站三维地应力场反演回归分析[J].人民长江,2000,31(9):42-44.(XIAO Ming,LIU Zhiming.Back analysis of3D initial geostress for Jinping II hydropower station[J].Yangtz River,2000,31(9):42-44.(in Chinese))
[17]高玮,冯夏庭,郑颖人.地下工程围岩参数反演的仿生算法及其工程应用研究[J].岩石力学与工程学报,2002,21(增2):2521-2526.(GAO Wei,FENG Xiating,ZHENG Yingren.Bionics algorithm for parameter inversion in underground engineering and engineering application[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(Supp.2):2521-2526.(in Chinese))
[2]孙钧,蒋树屏,袁勇,等.岩土力学反演问题的随机制论与方法[M].汕头:汕头大学出版社,1995.(SUN Jun,JIANG Shuping,YUAN Yong,et al.Random theory and methods of geomechanics back analysis[M].Shantou:Shantou University Press,1995.(in Chinese))
[3]杨林德.岩土工程问题的反演理论与工程实践[M].北京:科学出版社,1996.(YANG Linde.Theory and engineering practice of back analysis in engineering problems of rock and soil[M].Beijing:Science Press,1996.(in Chinese))
[4]都志辉.高性能计算之并行编程技术——MPI并行程序设计[M].北京:清华大学出版社,2001.(DU Zhihui.High-performance parallel computing—parallel programming based on MPI[M].Beijing:Tsinghua University Press,2001.(in Chinese))
[5]高玮,冯夏庭.基于免疫连续蚁群算法的岩土工程反分析研究[J].岩石力学与工程学报,2005,24(23):4266-4271.(GAO Wei,FENG Xiating.Study on a new back analysis algorithm in geotechnical engineering based on immunized continuous ant colony algorithm[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(23):4266-4271.(in Chinese))
[6]YANG X M,YUAN J S,YUAN J Y,et al.A modified particle swarm optimizer with dynamic adaptation[J].Applied Mathematics and Computation,2007,189(2):1205-1213.
[7]刘世君,徐卫东,王红春.不确定性岩石力学参数的区间反分析[J].岩石力学与工程学报,2004,23(6):885-888.(LIU Shijun,XU Weiya,WANG Hongchun.Interval back analysis of uncertain parameters in rock mechanics[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(6):885-888.(in Chinese))
[8]章光,朱维申.参数敏感性分析与试验方案优化[J].岩土力学,1993,14(1):51-57.(ZHANG Guang,ZHU Weishen.Parameter sensitivity analysis and optimizing for test programs[J].Rock and Soil Mechanics,1993,14(1):51-57.(in Chinese))
[9]黄书岭,冯夏庭,张传庆.岩体力学参数的敏感性综合评价分析方法研究[J].岩石力学与工程学报,2008,27(增1):2624-2630.(HUANG Shuling,FENG Xiating,ZHANG Chuanqing.Study of method of comprehensive evaluation for parameters of constitutive model of rock mass[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(Supp.1):2624-2630.(in Chinese))
[10]张继勋,姜弘道,任旭华.岩体参数对隧洞围岩稳定性影响的敏感性分析[J].采矿与安全工程学报,2006,23(2):169-172.(ZHANG Jixun,JIANG Hongdao,REN Xuhua.Sensitivity analysis of mechanical parameters influencing stabilization of surrounding rocks of tunnel[J].Journal of Mining and Safety Engineering,2006,23(2):169-172.(in Chinese))
[11]俞裕泰,肖明.大型地下洞室围岩稳定三维弹塑性有限元分析[J].岩石力学与工程学报,1987,6(1):47-56.(YU Yutai,XIAO Ming.Three-dimensional elastoplastic finite element analysis for the surrounding rock stability of large-scale underground openings[J].Chinese Journal of Rock Mechanics and Engineering,1987,6(1):47-56.(in Chinese))
[12]肖明.地下洞室施工开挖三维动态过程数值模拟分析[J].岩土工程学报,2000,22(4):421-425.(XIAO Ming.Three-dimensional numerical model of construction process for underground opening[J].Chinese Journal of Geotechnical Engineering,2000,22(4):421-425.(in Chinese))
[13]邹海,王桂梁,桂和荣,等.岩体力学参数的损伤——反分析优化性研究[J].长春科技大学学报,1999,29(2):167-170.(ZOU Hai,WANG Guiliang,GUI Herong,et al.The damage-back analysis study of rock mechanics parameter[J].Journal of Changchun University of Science and Technology,1999,29(2):167-170.(in Chinese))
[14]肖明.地下洞室围岩稳定三维有限元数值分析方法[博士学位论文][D].武汉:武汉大学,2002.(XIAO Ming.Study on numerical analysis method of stability and supporting for underground caverns[Ph.D.Thesis][D].Wuhan:Whuhan University,2002.(in Chinese))
[15]张玉军,刘谊平.正交各向异性岩体中地下洞室稳定的黏弹-黏塑性三维有限元分析[J].岩土力学,2002,23(3):278-283.(ZHANG Yujun,LIU Yiping.3D viscoelastic-viscoplastic finite element analysis for stability of underground opening in orthotropic rock mass[J].Rock and Soil Mechanics,2002,23(3):278-283.(in Chinese))
[16]肖明,刘志明.锦屏二级水电站三维地应力场反演回归分析[J].人民长江,2000,31(9):42-44.(XIAO Ming,LIU Zhiming.Back analysis of3D initial geostress for Jinping II hydropower station[J].Yangtz River,2000,31(9):42-44.(in Chinese))
[17]高玮,冯夏庭,郑颖人.地下工程围岩参数反演的仿生算法及其工程应用研究[J].岩石力学与工程学报,2002,21(增2):2521-2526.(GAO Wei,FENG Xiating,ZHENG Yingren.Bionics algorithm for parameter inversion in underground engineering and engineering application[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(Supp.2):2521-2526.(in Chinese))
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