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| p-y curves of laterally loaded batter piles in sand and its application |
| CAO Weiping1，XIA Bing1，ZHAO Min2，GE Xin1，3 |
| (1. School of Civil Engineering，Xi?an University of Architecture and Technology，Xi?an，Shaanxi 710055，China；2. School of Civil and Architecture Engineering，Xi?an Technological University，Xi?an，Shaanxi 710021，China；3. The 3st Engineering Co.，Ltd.，China Railway No.2 Engineering Group Co.，Ltd.，Chengdu，Sichuan 610031，China) |
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Abstract In order to obtain the p-y curves of laterally loaded piles in sand，a series of model tests including four battered piles and one plumbed pile embedded in the medium-dense dry sand were conducted and the relationship between the soil resistance p，and the lateral displacement y，of pile shaft was obtained by fitting the model test results. In addition，the stress-strain ( - ) curves for the sand used in the model tests were obtained based on the tri-axial compression test. A new p-y curve for laterally loaded batter piles was proposed according to the relationship between the dimensionless p-y expression and the dimensionless - curves. The methods to determine the parameters in the p-y curve were also given. The comparisons between the calculated results based on the p-y curve proposed，the model test results and the centrifuge model tests from references demonstrated that the p-y curve proposed for the laterally loaded batter piles was reasonable and can be used to describe the complex compression and shear behavior between the inclined piles and the surrounding soils. Finally，The p-y curves were used to analyze the behaviors of the inclined piles under different conditions and it was found that the lateral displacements and the maximum bending moments induced in the batter piles with the head fixed are less than that of batter piles with the head free. The existence of the vertical load on the pile head can reduce the lateral displacement and the bending moment in the negative batter piles but increase that in the positive batter piles. The increment of the stiffness of inclined piles can effectively reduce the lateral displacements and the maximum bending moment of the piles.
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[1] POULOS H G. Raked piles-virtues and draw backs[J]. Journal of Geotechnical and Geoenvironmental Engineering，2006，132(6)：795–803.
[2] GEROLYMOS N，GIANNAKOU A，ANASTASOPOULOS L，et al. Evidence of beneficial role of inclined piles：Observations and summary of numerical analyses[J]. Bulletin of Earthquake Engineering，2008，6(4)：705–722.
[3] 龚维明，黄 挺，戴国亮. 海上风电机高桩基础关键参数试验研究[J]. 岩土力学，2011，32(增2)：115–121.(GONG Weiming，HUANG Ting，DAI Guoliang. Experimental study of key parameters of high piled foundation for offshore wind turbine[J]. Rock and Soil Mechanics，2011，32(Supp.2)：115–121.(in Chinese))
[4] 靳 彩，赵 瑜，李风兰，等. 送电线路铁塔复合式斜桩基础试验研究[J]. 工业建筑，2001，31(9)：45–47.(JIN Cai，ZHAO Yu，LI Fenglan，et al. The experimental research on the complex inclined pile foundation for power line tower[J]. Industrial Construction，2001，31(9)：45–47.(in Chinese))
[5] 曹卫平，樊文甫. 水平荷载作用下斜桩承载变形性状数值分析[J]. 中国公路学报，2017，30(9)：34–43.(CAO Weiping，FAN Wenfu. Numerical analysis on bearing and deformation behavior of horizontally loaded batter piles[J]. China Journal of Highway and Transport，2017，30(9)：34–43.(in Chinese))
[6] 韩理安. 水平承载桩的计算[M]. 长沙：中南大学出版社，2004：3–6.(HAN Li?an. Calculation of horizontally loaded piles[M]. Changsha：Central South University Press，2004：3–6.(in Chinese))
[7] MATLOCK H. Correlation for design of laterally loaded piles in soft clay[C]// Proceedings of the Second Annual Offshore Technology Conference．Houston：Texas，1970：577–594.
[8] American Petraleum Institute. Recommended practice for planning，designing and constructing fixed offshore platforms[M]. Washington，D.C：American Petraleum Institute Production Department，2000：65–66.
[9] REESE L C，COX W R，KOOP F D．Analysis of laterally loaded piles in sand[C]// Proceedings of the Sixth Annual Offshore Technology Conference．Houston：Texas，1974：473–483．
[10] O?NEILL M W，MURCHINSON J M. An evaluation of p-y relationships in sand[R]. Washington D C：American Petroleum Institute，1983.
[11] 朱 斌，朱瑞燕，罗 军，等. 海洋高桩基础水平大变位性状模型试验研究[J]. 岩土工程学报，2010，32(4)：521–530.(ZHU Bin，ZHU Ruiyan，LUO Jun，et al. Model tests on characteristics of ocean and offshore elevated piles with large lateral deflection[J]. Chinese Journal of Geotechnical Engineering，2010，32(4)：521–530.(in Chinese))
[12] KONDNER R L. Hyperbolic stress-strain response：Cohesive soils[J]. Journal of Soil Mechanics and Foundation Division，1963，89(1)：115–144.
[13] 杨征宇，杨 剑，王天慧，等. 输电塔基础斜桩非线性p-y曲线[J]. 河海大学学报：自然科学版，2010，38(1)：104–108.(YANG Zhengyu，YANG Jian，WANG Tianhui，et al. Nonlinear p-y curve for batter piles infoundation of transmission towers[J]. Journal of Hohai University：Natural Science，2010，38(1)：104–108.(in Chinese))
[14] RAJASHREE S S，SITHARAM T G. Nonlinear finite-element modeling of batter piles under lateral load[J]. Journal of Geotechnical and Geoenvironmental Engineering，2001，127(7)：604–612.
[15] ZHANG L M，MCVAY M C，LAI P W. Centrifuge modelling of laterally loaded single battered piles in sand[J]. Canadian Geotechnical Journal，1999，36(6)：1 074–1 084.
[16] 袁廉华，陈仁朋，孔令刚，等. 轴向荷载对斜桩水平承载特性影响试验及理论研究[J]. 岩土力学，2013，34(7)：1 958–1 964.(YUAN Lianhua，CHEN Renpeng，KONG Linggang，et al. Test and theoretical research on influence of axial load on lateral bearing capacity of batter piles[J]. Rock and Soil Mechanics，2013，34(7)：1 958–1 964.(in Chinese))
[17] 凌道盛，任 涛，王云岗. 砂土地基斜桩水平承载特性p-y曲线法[J]. 岩土力学，2013，34(1)：155–162.(LING Daosheng，REN Tao，WANG Yungang. A p-y curves method for horizontal bearing characteristics of single batter pile in sands[J]. Rock and Soil Mechanics，2013，34(1)：155–162.(in Chinese))
[18] 中华人民共和国行业标准编写组. JTS 167–4—2012港口工程桩基规范[S]. 北京：人民交通出版社，2012.(The Professional Standards Compilation Group of People?s Republic of China. JTS 167–4—2012 Code for pile foundation of harbor engineering[S]. Beijing：China Communications Press，2012.(in Chinese))
[19] 中华人民共和国行业标准编写组. JGJ94－2008建筑桩基技术规范[S]. 北京：中国建筑工业出版社，2008.(The Professional Standards Compilation Group of People?s Republic of China. JGJ94－2008 Technical code for building pile foundations[S]. Beijing：China Architecture and Building Press，2008.(in Chinese))
[20] 邵红才，吕凡任，金耀华，等. 竖向荷载作用下对称双斜桩基础水平承载力模型试验研究[J]. 长江科学院院报，2014，31(6)：65–68. (SHAO Hongcai，LÜ Fanren，JIN Yaohua，et al. Model test on horizontal bearing capacity of symmetrically inclined double-pile under vertical load[J]. Journal of Yangtze River Scientific Research Institute，2014，31(6)：65–68.(in Chinese))
[21] MCCLELLAND B，JR J A F. Soil modulus for laterally loaded piles[J]. Transactions，ASCE，1958，123：1 049–1 063.
[22] 王惠初，武冬青，田 平. 黏土中横向静载桩P-Y曲线的一种新的统一法[J]. 河海大学学报：自然科学版，1991，19(1)：9–17.(WANG Huichu，WU Dongqing，TIAN Ping. A new unified method of p-y curve for laterally loaded pile groups in plasticity soil[J]. Journal of Hohai University，1991，19(1)：9–17.(in Chinese))
[23] REESE L，COX W，KOOP F. Field Testing and analysis of laterally loaded piles om stiff clay[C]// Proceedings of the Seventh Annual Offshore Technology Conference. Houston：Texas，1975：671–690.
[24] BROMS B. Lateral resistance of pile in cohesionless soil[J]. Journal of Soil Mechanics and Foundation Division，ASCE，1964，90(SM3)： 123–156.
[25] BARTON Y O. Laterally loaded model piles in sand：Centrifuge tests and finite element analyses[D]. London：University of Cambridge，1982.
[26] GUO W D. Simple model for nonlinear response of 52 laterally loaded piles[J]. Journal of Geotechnical and Geoenvironmental Engineering，2013，139(2)：234–252.
[27] 朱 斌，熊 根，刘晋超，等. 砂土中大直径单桩水平受荷离心模型试验[J]. 岩土工程学报，2013，35(10)：1 807–1 815.(ZHU Bin，XIONG Gen，LIU Jinchao，et al. Centrifuge modelling of a large-diameter single pile under lateral loads in sand[J]. Chinese Journal of Geotechnical Engineering，2013，35(10)：1 807–1 815.(in Chinese)) |
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2018, Vol. 37 
