基于地层生死技术的条分法在路基稳定分析中的应用
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摘要
条分法作为一种成熟、有效且简便的稳定性分析方法,在工程中得到了广泛的应用。对此,在经典条分法的基础上,采用地层生死技术,可以便捷地在模型中"杀死"所开挖的地层,进而模拟开挖工程对路基稳定性的影响。分析结果表明:基于地层生死技术的条分法,能够满足工程精度的要求,且其效率得到较大程度的提高,特别是对于需要进行开挖过程稳定性分析的工程,分析效率提升极为显著;此外对于一些复杂工况,比如在开挖工程和路基加固方案的耦合工况,采用地层生死技术进行稳定分析能够得到可靠的分析结果。
Slices method, as a mature, effective and simple method for stability analysis, is widely used in engineering. Based on classical slices method, element birth and death technology of stratum was used to allow the excavated stratum to be‘killed'easily in the model so as to simulate the effect of excavation on the subgrade stability. The result of analysis shows that the slices method, based on technology of element birth and death, may meet the engineering accuracy requirement with the efficiency improved to a relatively great extent, especially for the engineering requiring excavation stability analysis, the analysis efficiency is improved dramatically; in addition, for some complex cases, such as coupling case in excavation and subgrade reinforcement scheme, the element birth and death technology of stratum may obtain reliable result in stability analysis.
Slices method, as a mature, effective and simple method for stability analysis, is widely used in engineering. Based on classical slices method, element birth and death technology of stratum was used to allow the excavated stratum to be‘killed'easily in the model so as to simulate the effect of excavation on the subgrade stability. The result of analysis shows that the slices method, based on technology of element birth and death, may meet the engineering accuracy requirement with the efficiency improved to a relatively great extent, especially for the engineering requiring excavation stability analysis, the analysis efficiency is improved dramatically; in addition, for some complex cases, such as coupling case in excavation and subgrade reinforcement scheme, the element birth and death technology of stratum may obtain reliable result in stability analysis.
引文
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[3] 唐高朋,李亮,赵炼恒,等.非线性破坏准则下边坡稳定性极限分析斜条分法[J].岩土力学,2015,36 (7):2063-2072.TANG G P,LI L,ZHAOL H,et al.Inclined slices method for limit analysis of slope stability with nonlinear failure criterion[J].Rock and Soil Mechanics,2015,36(7):2063-2072.
[4] 寇日明.土坡稳定性分析的一种新的条分方法——径向条分法[J].水文地质工程地质,1988(3):43-46.KOU R M.Radially cutting method:a method to analyzing the stability of soil slope [J].Hydrogeology and Engineering Geology,1988 (3):43-46.
[5] 章惠冬.ANSYS单元生死技术软件在结构设计及施工中的应用[J].建筑施工,2008,30(9):824-825,833.ZHANG H D.Application to ANSYS unit technical software to structural design and construction[J].Building Construction,2008,30 (9):824-825,833.
[6] 吴建东,许健.ANSYS有限元生死单元技术在砼面板堆石坝渗流计算中的研究与应用 [J].甘肃农业大学学报,2011,46 (3):142-146,155.WU J D,XU J.Research and applications of ANSYS finite-element ekill and ealive technology in concrete face rockfill dam seepage calculation [J].Journal of Gansu Agricultural University,2011,46 (3):142-146,155.
[7] 王勖成.有限单元法[M].北京:清华大学出版社,2003.WANG X C.Finite Element Method[M].Beijing:Tsinghua University Press,2003.