不同弯矩作用时斜坡上单桩承载特性的数值模拟
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摘要
为研究不同弯矩作用对斜坡上单桩水平承载特性的影响,运用ABAQUS有限元分析软件建立45°斜坡模型,对不同弯矩荷载作用时斜坡上单桩桩身水平位移,桩身弯矩和桩前后土压力进行数值模拟。结果表明,随着桩顶弯矩荷载的增加,桩身水平侧移、桩身最大弯矩和桩前土压力均随之增加。桩顶弯矩的施加大大降低了斜坡上桩的水平承载力。
In order to study the effect of the horizontal bearing capacity of single pile on slope under different bending moments,ABAQUS software was used to establish a model for 45° slope. The horizontal displacement,bending moment as well as earth pressure before and behind pile were simulated under different moment loads.The results show that horizontal lateral-displacement,maximum bending moment of the pile as well as the earth pressure before pile increase along with the increase of the bending moment load. In practice,the bending moment can significantly reduce the level of bearing capacity of the pile on the slopes.
In order to study the effect of the horizontal bearing capacity of single pile on slope under different bending moments,ABAQUS software was used to establish a model for 45° slope. The horizontal displacement,bending moment as well as earth pressure before and behind pile were simulated under different moment loads.The results show that horizontal lateral-displacement,maximum bending moment of the pile as well as the earth pressure before pile increase along with the increase of the bending moment load. In practice,the bending moment can significantly reduce the level of bearing capacity of the pile on the slopes.
引文
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[16]MUTHUKKUMARAN K,ALMASBEGUM.Experimental Investigation of Single Model Pile Subjected to Lateral Loadin Sloping Ground[J].Geotechnical and Geological Engineering,2015,8(33):935-942.
[2]陈兆,陈骅伟,蒋冲,等.水平荷载作用下斜坡刚性桩非线性分析[J].土木建筑与环境工程,2016,38(3):47-52.CHEN Z,CHEN H W,JIANG C,et al.Nonliner analysis of rigid pile in slope under lateral load[J].Journal of Civil,Architectural&Environmental Engineering,2016,38(3):47-52.
[3]王云岗,章光,胡琦.斜桩基础受力特性研究[J].岩土力学,2011,32(7):2184-2190.WANG Y G,ZHANG G,HU Q.Study of force characteristics of battered pile foundation[J].Rock and Soil Mechanics,2011,32(7):2184-2190.
[4]巨玉文,梁仁旺,赵明伟.挤扩支盘桩的荷载传递法及数值模拟[J].建筑技术,2004,35(3):204-205.JU Y W,LIANG R W,ZHAO M W.Load transmission method of squeezed branch pile and its numerical simulation[J].Architecture Technology,2004,35(3):204-205.
[5]梁丰收,何光春,罗建美.岸坡与斜坡道桩基相互作用及桩基减载措施[J].水运工程,2011(11):211-218.LIANG F S,HE G C,LUO J M.Interaction between slope and pile of ramp and reduction load of pile[J].Port&Waterway Engineering,2011(11):211-218.
[6]张建伟,孔庆梅,马金栋,等.复杂荷载共同作用下斜坡上单桩承载特性研究[J].建筑结构,2014,44(16):96-99.ZHANG J W,KONG Q M,MA J D,et al.Study on bearing capacity of the single pile on slope under complex loads[J].Building Structure,2014,44(16):96-99.
[7]牛富生,许建聪,马亢.黄土斜坡桩基竖向荷载传递规律现场试验研究[J].岩土力学,2014,35(7):1899-1907.NIU F S,XU J C,MA K.Field experimental study of transmitted characteristics of pile foundation under vertical load in loess slope[J].Rock and Soil Mechanics,2014,35(7):1899-1907.
[8]谢剑铭,许锡昌,陈善雄,等.斜坡桩基水平承载变形特性试验研究[J].科学技术与工程,2013,13(17):5031-5036.XIE J M,XU X C,CHEN S X,et al.Preliminary experimental study on development of horizontal bearing capacity of pile adjacent to slope[J].Science Technology and Engineering,2013,13(17):5031-5036.
[9]程刘勇,许锡昌,陈善雄,等.斜坡基桩水平极限承载力及影响因素模型试验和数值模拟[J].岩土力学,2014,35(9):2685-2691.CHENG L Y,XU X C,CHEN S X,et al.Model test and numerical simulation of horizontal bearing capacity and impact factors for foundation piles in slope[J].Rock and Soil Mechanics,2014,35(9):2685-2691.
[10]赵春风,刘丰铭,邱志雄,等.砂土中竖向和水平荷载共同作用下的单桩承载特性研究[J].岩土工程学报,2015,37(1):183-190.ZHAO C F,LIU F M,QIU Z X,et al.Study on bearing behavior of a single pile under combined vertical and lateral loads in sand[J].Chinese Journal of Geotechnical Engineering,2015,37(1):183-190.
[11]MEYERHOF G G,SASTRY V V R N.Bearing capacity of rigid piles under eccentric and inclined loads[J].Canadian geotechnical journal,1985,22:267-276.
[12]SASTRY V V R N,MEYERHOF G G.Behavior of flexible piles in layered clays under eccentric and inclined loads[J].Canadian geotechnical journal,1995,32:387-396.
[13]ZHANG L M,MCVAY M C,HAN S J,et al,Effects of dead loads on the lateral response of battered pile groups[J].Canadian geotechnical journal,2002,39:561-575.
[14]TASUNORI MATSUMOTO.Experimental and analytical study on behavior of model piled rafts in sand subjected to horizontal and moment loading[C]//International Journal of Physical Modeling in geotechnical,Hong Kong,2004.
[15]JEGATHEESWARAN B,MUTHUKKUMARAN K.Behavior of pile due to combined loading with lateral soil movement[J].Jegatheeswaran and Muthukkumaran Geo-Engineering,2016,7(1):1-10.
[16]MUTHUKKUMARAN K,ALMASBEGUM.Experimental Investigation of Single Model Pile Subjected to Lateral Loadin Sloping Ground[J].Geotechnical and Geological Engineering,2015,8(33):935-942.