双排抗滑桩的推力分担及优化设计
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摘要
大截面的双排抗滑桩具有复杂的受力特性。建立有限元模型,分析不同排距下双排桩对推力的分担,分析结果显示:双排桩上的推力总和要大于只设前排桩时的推力;当排距较小时,滑坡推力几乎全由后排桩承担,由于后排桩的遮蔽作用,前排桩达不到最佳抗滑效果,随着排距增加,前排桩分担的推力逐渐增加,当达到一定排距后,双排桩完全独立工作,各自承担一部分滑体,前后双排桩均达到最佳抗滑效果;并在推力分担、支挡后稳定系数的计算基础上,提出以双排桩的推力和、稳定系数和双排桩承担的推力差为目标,建立用于双排抗滑桩的多目标优化,优选出具有多种属性的双排抗滑桩的排距和推力分担。
The structure of two-row anti-slide piles is a complex mechanical characteristics.A finite element model is established and the share ratios with the thrust of the front and back rows of piles at different row distances are discussed.It indicates that the total thrust of the two-row piles is bigger than the thrust of only the front row piles.While the row distance is small,the back row pile shared almost all the thrust,and with the masking function of the back row piles,the front row pile couldn't display the best effectiveness.When the pile row distance increased,the share ratio of piles in front row increased gradually.The two piles worked independently,resisted part sliding block respectively and displayed the best effectiveness at the particular row distance.Based on calculation of trust and stability factor for the structure of two-row anti-slide piles,the projects of the total trust,the stability factor and the difference of two piles are selected and the multi-project optimization for two-row anti-slide piles is put forward.The most reasonable row distance and share ratio of the thrust are attained.
The structure of two-row anti-slide piles is a complex mechanical characteristics.A finite element model is established and the share ratios with the thrust of the front and back rows of piles at different row distances are discussed.It indicates that the total thrust of the two-row piles is bigger than the thrust of only the front row piles.While the row distance is small,the back row pile shared almost all the thrust,and with the masking function of the back row piles,the front row pile couldn't display the best effectiveness.When the pile row distance increased,the share ratio of piles in front row increased gradually.The two piles worked independently,resisted part sliding block respectively and displayed the best effectiveness at the particular row distance.Based on calculation of trust and stability factor for the structure of two-row anti-slide piles,the projects of the total trust,the stability factor and the difference of two piles are selected and the multi-project optimization for two-row anti-slide piles is put forward.The most reasonable row distance and share ratio of the thrust are attained.
引文
[1]申永江,吕庆,尚岳全.桩排距对双排抗滑桩内力的影响[J].岩土工程学报,2008,30(7):1033-1037.(SHEN Yongjiang,LU Qing,SHANG Yuequan.Effect of pile distance on internal stress of double-row anti-slide piles[J].Chinese Journal of Geotechnical Engineering,2008,30(7):1033-1037.(in Chinese))
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[8]王湛,刘冰花.双排桩计算方法探讨[J].东北地震研究,2001,17(2):64-68.(WANG Zhan,LIU Binghua.Research on calculation method for double-piles[J].Seismological Research of Northeast China,2001,17(2):64-68.(in Chinese))
[9]何颐华,杨斌,金宝森,等.双排护坡桩试验与计算的研究[J].建筑结构学报,1996,17(2):58-66.(HE Yihua,YANG Bing,JING Baosen,et al.Research on the test and calculation of slope protection piles[J].Journal of Building Structures,1996,17(2):58-66.(in Chinese))
[10]吕美君,晏鄂川.埋入式双排抗滑桩滑坡推力分配研究[J].岩石力学与工程学报,2005,24(增1):4866-4871.(LU Meijun,YAN Echuan.Study of distribution laws of landslide-thrust in double-row embedded anti-slide piles[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(Supp.1):4866-4871.(in Chinese))
[11]ZHU D Y,LEE C F,JIANG H D.Generalised framework of limit equilibrium methods and numerical procedure for slope stability analysis[J].Geotechnique,2003,53(4):377-395.
[12]FENG X T,CHEN B R,YANG C X,et al.Identification of viscoelastic models for rocks using genetic program ming coupled with the modified particle swarm optimization algorithm[J].International Journal of Rock Mechanics and Mining Sciences,2006,43(5):789-801.
[13]郑颖人,赵尚毅.有限元强度折减法在土坡与岩坡中的应用[J].岩石力学与工程学报,2004,23(19):3381-3388.(ZHENG Yingren,ZHAO Shangyi.Application of strength reduction FEM in soil and rock slope[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(19):3381-3388.(in Chinese))
[14]郑颖人,赵尚毅.边(滑)坡工程设计中稳定系数的讨论[J].岩石力学与工程学报,2006,25(9):1937-1940.(ZHENG Yingren,ZHAO Shangyi.Discussion on safety factors of slope and landslide engineering design[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(9):1937-1940.(in Chinese))
[15]刘金龙,栾茂田,赵少飞,等.关于强度折减有限元方法中边坡失稳判据的讨论[J].岩石力学与工程学报,2005,26(8):1345-1348.(LIU Jinlong,LUAN Maotian,ZHAO Shaofei,et al.Discussion on criteria for evaluating stability of slope in elastoplastic FEM based on shear strength reduction technique[J].Chinese Journal of Rock Mechanics and Engineering,2005,26(8):1345-1348.(in Chinese))
[16]FENG X T,ZHAO H B,LI S J.A new displacement back analysis to identify mechanical geo-material parameters based on hybrid intelligent methodology[J].International Journal for Numerical and Analytical Method in Geomechanics,2004,28(11):1141-1165.
[17]ZHENG Y R,KONG L.Generalized plastic mechanics and its application[J].Engineering Sciences,2006,4(1):6-26.
[18]尹顺德,冯夏庭,张友良,等.滑坡加固方案优化的并行进行神经网络方法研究[J].岩石力学与工程学报,2004,23(16):2698-2702.(YIN Shunde,FENG Xiating,ZHANG Youliang,et al.Study of optimum design of landslide stabilization by parallel evolutionary neural network method[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(16):2698-2702.(in Chinese))
[2]熊治文,马辉,朱海东.全埋式双排抗滑桩的受力分布[J].路基工程,2008,30(7):1033-1037.(XIONG Zhiwen,MA Hui,ZHU Haidong.The distribution of mechanical properties in double-row embedded anti-slide piles[J].Subgrade Engineering,2008,30(7):1033-1037.(in Chinese))
[3]刘小丽.新型桩锚结构设计计算理论研究[博士学位论文][D].成都:西南交通大学,2003.(LIU Xiaoli.Study of the calculation theory of the new pile-anchor structure[Ph.D.Thesis][D].Chengdu:Southwest Jiaotong University,2003.(in Chinese))
[4]周翠英,刘祚秋,尚伟,等.门架式双排抗滑桩设计计算新模式[J].岩土力学,2005,26(3):441-444.(ZHOU Cuiying,LIU Zuoqiu,SHANG Wei,et al.A new mode for calculation of portal double row anti-slide piles[J].Rock and Soil Mechanic,2005,26(3):441-444.(in Chinese))
[5]蔡袁强,赵永倩,吴世明,等.软土地基深基坑中双排桩式围护结构有限元分析[J].浙江大学学报,1997,31(4):442-448.(CAI Yuanqiang,ZHAO Yongqian,WU Shiming,et al.FEA of the deep pit excavation with retaining structure of the double piles in soft clay[J].Journal of Zhejiang University,1997,31(4):442-448.(in Chinese))
[6]王军,王磊,肖昭然.双排桩支护排距的有限元分析与研究[J].地下空间与工程学报,2005,1(6):1096-1099.(WANG Jun,WANG Lei,XIAO Zhaoran.Analysis of the interval between double-row piles by FEM[J].Chinese Journal of Underground Space and Engineering,2005,1(6):1096-1099.(in Chinese))
[7]平扬,白世伟,曹俊坚.深基双排桩空间协同计算理论及位移反分析[J].土木工程学报,2001,34(2):79-83.(PING Yang,BAI Shiwei,CAO Junjian.Calculation theory considering spatial influence and displacement feedback design of double row piles in deep foundation[J].Chinese of Civil Engineering Journal,2001,34(2):79-83.(in Chinese))
[8]王湛,刘冰花.双排桩计算方法探讨[J].东北地震研究,2001,17(2):64-68.(WANG Zhan,LIU Binghua.Research on calculation method for double-piles[J].Seismological Research of Northeast China,2001,17(2):64-68.(in Chinese))
[9]何颐华,杨斌,金宝森,等.双排护坡桩试验与计算的研究[J].建筑结构学报,1996,17(2):58-66.(HE Yihua,YANG Bing,JING Baosen,et al.Research on the test and calculation of slope protection piles[J].Journal of Building Structures,1996,17(2):58-66.(in Chinese))
[10]吕美君,晏鄂川.埋入式双排抗滑桩滑坡推力分配研究[J].岩石力学与工程学报,2005,24(增1):4866-4871.(LU Meijun,YAN Echuan.Study of distribution laws of landslide-thrust in double-row embedded anti-slide piles[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(Supp.1):4866-4871.(in Chinese))
[11]ZHU D Y,LEE C F,JIANG H D.Generalised framework of limit equilibrium methods and numerical procedure for slope stability analysis[J].Geotechnique,2003,53(4):377-395.
[12]FENG X T,CHEN B R,YANG C X,et al.Identification of viscoelastic models for rocks using genetic program ming coupled with the modified particle swarm optimization algorithm[J].International Journal of Rock Mechanics and Mining Sciences,2006,43(5):789-801.
[13]郑颖人,赵尚毅.有限元强度折减法在土坡与岩坡中的应用[J].岩石力学与工程学报,2004,23(19):3381-3388.(ZHENG Yingren,ZHAO Shangyi.Application of strength reduction FEM in soil and rock slope[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(19):3381-3388.(in Chinese))
[14]郑颖人,赵尚毅.边(滑)坡工程设计中稳定系数的讨论[J].岩石力学与工程学报,2006,25(9):1937-1940.(ZHENG Yingren,ZHAO Shangyi.Discussion on safety factors of slope and landslide engineering design[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(9):1937-1940.(in Chinese))
[15]刘金龙,栾茂田,赵少飞,等.关于强度折减有限元方法中边坡失稳判据的讨论[J].岩石力学与工程学报,2005,26(8):1345-1348.(LIU Jinlong,LUAN Maotian,ZHAO Shaofei,et al.Discussion on criteria for evaluating stability of slope in elastoplastic FEM based on shear strength reduction technique[J].Chinese Journal of Rock Mechanics and Engineering,2005,26(8):1345-1348.(in Chinese))
[16]FENG X T,ZHAO H B,LI S J.A new displacement back analysis to identify mechanical geo-material parameters based on hybrid intelligent methodology[J].International Journal for Numerical and Analytical Method in Geomechanics,2004,28(11):1141-1165.
[17]ZHENG Y R,KONG L.Generalized plastic mechanics and its application[J].Engineering Sciences,2006,4(1):6-26.
[18]尹顺德,冯夏庭,张友良,等.滑坡加固方案优化的并行进行神经网络方法研究[J].岩石力学与工程学报,2004,23(16):2698-2702.(YIN Shunde,FENG Xiating,ZHANG Youliang,et al.Study of optimum design of landslide stabilization by parallel evolutionary neural network method[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(16):2698-2702.(in Chinese))
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