深基坑土钉支护的有限元数值模拟及稳定性分析
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摘要
在平面应变条件下,对土钉支护的基坑进行了有限元数值模拟,在此基础上采用有限元稳定分析方法评价基坑的稳定性。研究了土钉拉力及基坑变形的变化规律,土钉长度及布置方式变化对基坑变形和稳定性的影响。结果表明,当土钉足够长时,基坑的潜在滑动面与最大拉力作用点连线位置通常是一致的。
Under the condition of plane strain,a 2D elastoplastic FEM is used to analyze the behavior of a soil nailing support for deep foundation pit;and stability method based on slip surface FE stress is applied to evaluate the stability of the soil-nailed wall.The variations of tensile force of soil nails and deformation of foundation pit are studied.The influence of different lengths and layouts of soil nails on stability and deformation of foundation pit is also analyzed.The result indicates that the potential slip surface of foundation pit is consistent with the position of maximal tensile force when the soil nails are long enough.
Under the condition of plane strain,a 2D elastoplastic FEM is used to analyze the behavior of a soil nailing support for deep foundation pit;and stability method based on slip surface FE stress is applied to evaluate the stability of the soil-nailed wall.The variations of tensile force of soil nails and deformation of foundation pit are studied.The influence of different lengths and layouts of soil nails on stability and deformation of foundation pit is also analyzed.The result indicates that the potential slip surface of foundation pit is consistent with the position of maximal tensile force when the soil nails are long enough.
引文
[1]陈肇元,崔京浩.土钉支护在基坑工程中的应用[M].北京:中国建筑工业出版社,2000.
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[3]宋二祥,陈肇元.土钉支护及其有限元分析[J].工程勘察,1996,(2):1-5.
[4]邵龙潭,唐洪祥,韩国城.有限元边坡稳定分析方法及其应用[J].计算力学学报,2001,18(1):81-87.SHAO Long-tan,TANG Hong-xiang,HAN Guo-cheng.Finite element method for slope stability anslysis with its applications[J].Chinese Journal of Computational Mechanics,2001,18(1):81-87.
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[7]杨林德,李象范,钟正雄.复合型土钉墙的非线性有限元分析[J].岩土工程学报,2001,23(3):149-152.YANG Lin-de,LI Xiang-fan,ZHONG Zheng-xiong.The nonlinear analysis of FEM on composite soil-nailed retaining wall[J].Chinese Journal of Geotechnical Engineering,2001,23(3):149-152.
[8]陈进杰,贾金青,张明聚.土钉支护工作性能参数分析[J].岩土工程学报,2001,23(5):618-622.CHEN Jin-jie,JIA Jin-qing,ZHANG Ming-ju.Parametric studies on behaviors of soil nailing[J].Chinese Journal of Geotechnical Engineering,2001,23(5):618-622.
[9]武亚军,栾茂田,杨敏.深基坑土钉支护的弹塑性数值模拟[J].岩石力学与工程学报,2005,24(9):1549-1554.WU Ya-jun,LUAN Mao-tian,YANG Min.Elasto-plastic Numerical Simulation of Soil Nailing Support of Deep Foundation Pit[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(9):1 549-1 554.
[10]Z_SOIL.PC.2003.User manual[R].Zace Services Ltd.Report 1985-2003.Lausanne:Switzerland,2003.
[2]连镇营,韩国城,吕凯歌.土钉支护弹塑性数值分析及稳定性探讨[J].岩土力学,2002,23(1):85-89.LIAN Zhen-ying,HAN Guo-cheng,LU Kai-ge.Elastoplastic numerical analysis and stability study of soil-nailed wall[J].Rock and Soil Mechanics,2002,23(1):85-89.
[3]宋二祥,陈肇元.土钉支护及其有限元分析[J].工程勘察,1996,(2):1-5.
[4]邵龙潭,唐洪祥,韩国城.有限元边坡稳定分析方法及其应用[J].计算力学学报,2001,18(1):81-87.SHAO Long-tan,TANG Hong-xiang,HAN Guo-cheng.Finite element method for slope stability anslysis with its applications[J].Chinese Journal of Computational Mechanics,2001,18(1):81-87.
[5]秦四清,王建党.土钉支护机理与优化设计[M].北京:地震出版社,1999.
[6]张明聚,宋二祥.土钉支护变形性能的有限元分析[J].土木工程学报,1999,32(6):59-63.ZHANG Ming-ju,SONG Er-xiang.Analysis of deflection behavior of soil nailing by FEM[J].China Civil Engineering Journal,1999,32(6):59-63.
[7]杨林德,李象范,钟正雄.复合型土钉墙的非线性有限元分析[J].岩土工程学报,2001,23(3):149-152.YANG Lin-de,LI Xiang-fan,ZHONG Zheng-xiong.The nonlinear analysis of FEM on composite soil-nailed retaining wall[J].Chinese Journal of Geotechnical Engineering,2001,23(3):149-152.
[8]陈进杰,贾金青,张明聚.土钉支护工作性能参数分析[J].岩土工程学报,2001,23(5):618-622.CHEN Jin-jie,JIA Jin-qing,ZHANG Ming-ju.Parametric studies on behaviors of soil nailing[J].Chinese Journal of Geotechnical Engineering,2001,23(5):618-622.
[9]武亚军,栾茂田,杨敏.深基坑土钉支护的弹塑性数值模拟[J].岩石力学与工程学报,2005,24(9):1549-1554.WU Ya-jun,LUAN Mao-tian,YANG Min.Elasto-plastic Numerical Simulation of Soil Nailing Support of Deep Foundation Pit[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(9):1 549-1 554.
[10]Z_SOIL.PC.2003.User manual[R].Zace Services Ltd.Report 1985-2003.Lausanne:Switzerland,2003.
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