裂隙围岩弹性力学参数反分析与验证
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摘要
以浙江某穿山隧道为工程背景,通过二次开发,建立UCODE软件与有限元软件之间接口程序,对隧道裂隙围岩弹性力学参数—围岩弹性模量E及泊松比υ,进行反分析计算,反分析计算设置四组待定参数初始值。迭代计算结果表明,对于不同的参数初始值,反分析结果收敛于同一组解,验证了反分析算法的稳定性。通过将围岩参数反分析结果与设定值比较,其相对误差分别为2.17%和2.53%,均满足反分析精度要求。
Based on a mountain tunnel excavation in Zhejiang Province,a back analysis was conducted to identify the elastic mechanical properties of cracked surrounding rock in the tunnel,such as elastic modulus E and Poisson's ratio v. The interface between the finite element software and UCODE was established. Four groups of initial values of the elastic mechanical properties were set. Iteration results show that,for different initial values of mechanical properties,the results converged to the same set of solution. Then the stability of the back analysis algorithm was verified.The results also show that the relative errors of the evaluated elastic modulus E and Poisson's ratio v are 2. 17% and 2. 53%,respectively,which meets the accuracy requirement.
Based on a mountain tunnel excavation in Zhejiang Province,a back analysis was conducted to identify the elastic mechanical properties of cracked surrounding rock in the tunnel,such as elastic modulus E and Poisson's ratio v. The interface between the finite element software and UCODE was established. Four groups of initial values of the elastic mechanical properties were set. Iteration results show that,for different initial values of mechanical properties,the results converged to the same set of solution. Then the stability of the back analysis algorithm was verified.The results also show that the relative errors of the evaluated elastic modulus E and Poisson's ratio v are 2. 17% and 2. 53%,respectively,which meets the accuracy requirement.
引文
[1]孙钧,戚玉亮.隧道围岩稳定性正算反演分析研究——以厦门海底隧道穿越风化深槽施工安全监控为例介绍[J].岩土力学,2010,31(8):2353-2360.
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[5]赵成龙,李术才,徐帮树,等.动态增量位移正算反演分析及其在隧道工程中的应用[J].现代隧道技术,2014,51(35906):78-82+100.
[6]杨蒙,谭跃虎,李二兵,等.基于敏感性分析的围岩力学参数反演方法研究[J].地下空间与工程学报,2014,10(7605):1030-1038.
[7]张强勇,向文,杨佳.大岗山地下厂房洞室群围岩力学参数的动态反演与开挖稳定性分析研究[J].土木工程学报,2015,48(5):90-97.
[8]陈智,毛安琪,窦斌强,等.某隧道围岩参数反演分析及实时施工应用[J].水电能源科学,2015,33(3):104-107+49.
[9]张研,苏国韶,燕柳斌,等.围岩压力释放率智能优化反分析方法[J].广西大学学报:自然科学版,2014,39(4):802-808.
[10]POETER E P,HILL M C.UCODE.A computer code for universal inverse modeling[J].Computers&Geosciences,1999,25(4):457-462.
[11]RECHEA C,LEVASSEUR S,FINNO R.Inverse analysis techniques for parameter identification in simulation of excavation support systems[J].Computers and Geotechnics,2008,35(3):331-345.
[12]CALVELLO M,FINNO R J.Selecting parameters to optimize in model calibration by inverse analysis[J].Computers and Geotechnics,2004,31(5):410-424.
[2]徐中华,李靖,王卫东,等.基坑工程平面竖向弹性地基梁法中土的水平抗力比例系数反分析研究[J].岩土力学,2014,35(S2):398-404,411.
[3]王芝银,杨志法,王思敬.岩石力学位移反演分析回顾及进展[J].力学进展,1998(4):488-498.
[4]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(3):221-229+317.
[5]赵成龙,李术才,徐帮树,等.动态增量位移正算反演分析及其在隧道工程中的应用[J].现代隧道技术,2014,51(35906):78-82+100.
[6]杨蒙,谭跃虎,李二兵,等.基于敏感性分析的围岩力学参数反演方法研究[J].地下空间与工程学报,2014,10(7605):1030-1038.
[7]张强勇,向文,杨佳.大岗山地下厂房洞室群围岩力学参数的动态反演与开挖稳定性分析研究[J].土木工程学报,2015,48(5):90-97.
[8]陈智,毛安琪,窦斌强,等.某隧道围岩参数反演分析及实时施工应用[J].水电能源科学,2015,33(3):104-107+49.
[9]张研,苏国韶,燕柳斌,等.围岩压力释放率智能优化反分析方法[J].广西大学学报:自然科学版,2014,39(4):802-808.
[10]POETER E P,HILL M C.UCODE.A computer code for universal inverse modeling[J].Computers&Geosciences,1999,25(4):457-462.
[11]RECHEA C,LEVASSEUR S,FINNO R.Inverse analysis techniques for parameter identification in simulation of excavation support systems[J].Computers and Geotechnics,2008,35(3):331-345.
[12]CALVELLO M,FINNO R J.Selecting parameters to optimize in model calibration by inverse analysis[J].Computers and Geotechnics,2004,31(5):410-424.