双向非均质土中填砂竹节管桩纵向振动理论与试验研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (14) : 43-52.

论文

刘鑫1,2，王奎华1,2，涂园1,2

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Theoretical and experimental study on the longitudinal vibration of sand-filled nodular pipe piles in bidirectional inhomogeneous soil

LIU Xin1,2，WANG Kuihua1,2，TU Yuan1,2

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摘要

填砂竹节管桩是一种新型复合桩基，通过竹节管桩、桩周填砂层和地基土共同承担上部荷载。基于考虑竖向波动效应的轴对称粘弹性土体模型研究其桩顶动力响应。首先利用虚土桩模拟桩底土体的支承作用，并对桩周介质进行径向和纵向分层，而后利用连续条件推得桩和桩周介质界面接触应力，根据拉式变换和阻抗传递函数计算复合桩基桩顶阻抗解析解和速度时域响应半解析解，并讨论填砂层和竹节参数的影响；最后将理论曲线与现场试验实测曲线进行对比，结果表明，理论曲线和实测曲线吻合较好，所建模型能够反映实际工况下填砂竹节管桩的动力响应。研究成果对于填砂竹节管桩纵向振动的理论研究及工程应用具有一定的参考价值。

Abstract

Sand-filled nodular pipe pile is a new type of composite pile foundation, which bears the upper load by combination of nodular pipe pile, sand-filled layer around the pile and foundation soil. Based on the axisymmetric viscoelastic soil model considering vertical wave effect, the dynamic response of this pile foundation is studied. Firstly, fictitious soil pile model is used to simulate the supporting function of soil at the pile bottom, and media around the pile is stratified at radial and longitudinal directions. Then interfacial contact stress between the pile and media around the pile is deduced by continuous conditions, and analytical solution of impedance as well as semi-analytical solution of velocity response in time domain at the pile top is calculated according to the Laplace Transform and impedance transfer function. Afterwards the effects of parameters of sand-filling layer and nodular parts are discussed. Finally, the theoretical calculation curve is compared with the measured curve in field test, whose results show that theoretical curve is in good agreement with the measured curve and the proposed model can reflect the dynamic response of sand-filled pipe pile under actual working conditions. The results have some value for theoretical research and engineering application related to longitudinal vibration of sand-filled nodular pipe pile.

导出引用

刘鑫1,2，王奎华1,2，涂园1,2. 双向非均质土中填砂竹节管桩纵向振动理论与试验研究[J]. 振动与冲击, 2020, 39(14): 43-52

LIU Xin1,2，WANG Kuihua1,2，TU Yuan1,2. Theoretical and experimental study on the longitudinal vibration of sand-filled nodular pipe piles in bidirectional inhomogeneous soil[J]. Journal of Vibration and Shock, 2020, 39(14): 43-52

参考文献

[1] 蔡邦国,姜玉龙,王理璞,等.填砂竹节桩的承载性能对比研究[J].山西建筑,2018,44(31):55-57.
CAI bang-guo, JIANG yu-long ,WANG li-pu, et al. Comparative study on bearing capacity of sand-filled nodular pile[J]. Shanxi Architecture,2018,44(31):55-57.
[2] 周佳锦,龚晓南,严天龙,等.软土地区填砂竹节桩抗压承载性能研究[J].岩土力学,2018,39(09):3425-3432.
ZHOU jia-jin, GONG xiao-nan, YAN Tian-long, et al. Behavior of sand filled nodular piles under compression in soft soil areas[J]. Rock and Soil Mechanics, 2018,39(09):3425-3432.
[3] Novak, Milos. Dynamic stiffness and damping of piles[J]. Canadian Geotechnical Journal, 1974, 11(4):574-598.
[4] Liao S T, Roesset J M. Identification of defects in piles through dynamic testing [J]. International Journal for Numerical and Analytical Methods in Geomechanics, 1997, 21(4):277-291.
[5] 王奎华,谢康和,曾国熙.有限长桩受迫振动问题解析解及其应用[J].岩土工程学报,1997,(06):27-35.
WANG kui-hua,XIE kang-he, ZENG guo-xi. Analytical solution of Finite Length Pile under forced vibration and its application[J]. Chinese Journal of Geotechnical Engineer, 1997,(06):27-35.
[6] El Naggar M H , Novak M . Nonlinear axial interaction in pile dynamics[J]. Journal of Geotechnical Engineering, 1994, 120(4):678-696.
[7] EI Naggar M H. Vertical and torsional soil reactions for radially inhomogeneous soil layer[J]. Structural Engineering & Mechanics, 2000, 10(4):299-312.
[8] 王奎华, 杨冬英, 张智卿. 基于复刚度传递多圈层平面应变模型的桩动力响应研究[J]. 岩石力学与工程学报, 2008,(04):825-831.
WANG kui-hua, YANG dong-ying, ZHANG zhi-qin. Study on dynamic response of pile based on complex stiffness transfer model of radial multizone plane strain[J]. Chinese Journal of Rock Mechanics and Engineering，2008,(04):825-831.
[9] 杨冬英, 王奎华, 丁海平. 三维非均质土中粘弹性桩-土纵向耦合振动响应[J]. 土木建筑与环境工程, 2011, 33(3):80-87.
YANG dong-ying, WANG kui-hua, DING hai-ping. Axial response of viscoelastic pile-soil coupling interaction in three-dimensional inhomogeneous soil[J]. Journal of Civil Architectural &Environmental Engineering, 2011, 33(3):80-87.
[10] Nogami T , Novak M . Soil-pile interaction in vertical vibration[J]. Earthquake Engineering and Structural Dynamics, 1976, 4(3):277-293.
[11] 吴文兵, 蒋国盛, 邓国栋, 等. 黏弹性地基中基于虚土桩模型的桩顶纵向振动阻抗研究[J]. 振动与冲击, 2015, 34(7):192-198.
WU wen-bing, JIANG guo-sheng, DENG guo-dong, et al. Vertical dynamic impedance of pile embedded in viscoelastic soil based on fictitious soil pile model[J]. Journal of Vibration and Shock, 2015, 34(7):192-198.
[12] 王奎华, 阙仁波, 夏建中. 考虑土体真三维波动效应时桩的振动理论及对近似理论的校核[J]. 岩石力学与工程学报, 2005,(08):1362-1370.
WANG kui-hua, QUE ren-bo, XIA jian-zhong. Theory of pile vibration considering true three-dimensional wave effect of soil and its check on the approximate theories[J]. Chinese Journal of Rock Mechanics and Engineering，2005,(08):1362-1370.
[13] 吴文兵, 王奎华, 窦斌. 任意层地基中粘弹性楔形桩纵向振动响应研究[J]. 振动与冲击, 2013, 32(8):120-127.
WU wen-bing, WANG kui-hua, DOU bin. Vertical dynamic response of a viscoelastic tapered pile embedded in layered foundation[J]. Journal of Vibration and Shock, 2013, 32(8):120-127.
[14] 吴文兵, 谢帮华, 黄生根,等. 考虑挤土效应时楔形桩纵向振动阻抗研究[J]. 地震工程学报, 2015,(4):1042-1048.
WU wen-bing, XIE bang-hua, HUANG sheng-gen, et al. Vertical dynamic impedance of tapered piles considering compacting effects[J].China Earthquake Engineering Journal. 2015,(4):1042-1048.
[15] 王奎华, 高柳, 肖偲, 等. 考虑桩周土竖向作用大直径楔形桩纵向振动特性[J]. 岩土力学, 2016,(S2):223-231.
WANG kui-hua, GAO liu, XIAO si, et al. Dynamic characteristic of large diameter tapered pile considering vertical reaction of pile surrounding soil[J]. Rock and Soil Mechanics, 2016,(S2):223-231.
[16] 刘汉龙, 丁选明. 现浇薄壁管桩在低应变瞬态集中荷载作用下的动力响应解析解[J]. 岩土工程学报, 2007, 29(11):1611-1617.
LIU han-long, DING xuan-ming. Analytical solution of dynamic response of cast-in-situ concrete thin-wall pipe piles under transient concentrated load with low strain[J]. Chinese Journal of Geotechnical Engineer, 2007, 29(11):1611-1617.
[17] 王奎华, 李振亚, 吕述晖, 等. 静钻根植竹节桩纵向振动特性及应用研究[J]. 浙江大学学报(工学版), 2015, 49(3):522-530.
WNAG kui-hua, LI zhen-ya, LV shuhui, et al. Vertical vibration characteristics of static drill rooted nodular pile and its applications[J]. Journal of Zhejiang University(Engineering Science) ,2015, 49(3):522-530.
[18] 吴君涛, 王奎华, 肖偲, 等. 静钻根植工法下变截面管桩纵向振动特性分析[J]. 岩石力学与工程学报, 2018, 37(4):1030-1040.
WU jun-tao, WANG kui-hua, XIAO si, et al. Longitudinal vibration characteristics of static drill rooted tubular piles with variable section[J]. Chinese Journal of Rock Mechanics and Engineering, 2018, 37(4):1030-1040.
[19] 王奎华,高柳,吴君涛,肖偲.三维波动土中考虑桩身变截面与桩周土相互作用的大直径桩的动力特性[J].岩石力学与工程学报,2017,36(02):496-503.
WANG kui-hua, GAO liu, WU jun-tao, et al. Dynamic response of a large diameter pile considering the interaction of variable pile section with surrounding layered three-dimensional soil[J]. Chinese Journal of Rock Mechanics and Engineering, 2017,36(02):496-503.
[20] 高柳,王奎华,李振亚,郭海超,王宁.考虑桩周土竖向作用和施工扰动效应时大直径楔形桩的纵向振动特性[J].振动与冲击,2018,37(02):30-37+65.
GAO liu, WANG kui-hua, GUO hai-chao, et al. Vertical vibration characteristics of a large diameter tapered pile considering vertical actionof surrounding soil and construction disturbance effect[J]. Journal of Vibration and Shock, 2018,37(02):30-37+65.
[21] 吴君涛,王奎华,刘鑫,孙梵.考虑桩身三维效应下的大直径薄壁管桩–桩端土塞耦合振动模型及其解析解[J/OL].岩石力学与工程学报:1-9.
WU jun-tao，WANG kui-hua, LIU xin, et al. A large diameter thin-wall pipe pile-soil plug coupled dynamic model considering pile three-dimensional effect and its analytical solution[J/OL]. Chinese Journal of Rock Mechanics and Engineering:1-9.
[22] 胡昌斌,王奎华,谢康和.桩与粘性阻尼土耦合纵向振动时桩顶时域响应研究[J].振动工程学报,2004(01):76-81.
HU chang-bin, WANG kui-hua, XIE kang-he. Time Domain Axial Response of Dynamically Loaded Pile in Viscous Damping Soil Layer[J]. Journal of Vibration Engineering, 2004(01):76-81.
[23] 崔春义, 孟坤, 武亚军, 等. 轴对称径向非均质土中单桩纵向振动特性研究[J]. 岩土力学, 2019,40(02):570-579+591.
CUI chun-yi, MENG kun, WU ya-jun, et al. Dynamic impedance for vertical vibration of single pile in axisymmetrically surrounding soil considering the radial inhomogeneity[J]. Rock and Soil Mechanics, 2019,40(02):570-579+591.
[24] 黄博, 夏唐代, 周新民,等. 基于微观尺度的砂土剪切波速度[J]. 中南大学学报(自然科学版), 2016,47(06):2001-2006.
HUANG bo, XIANG tang-dai, ZHOU xin-min, et al. Shear wave velocity in sand based on microscopic size[J]. Journal of Central South University(Science and Technology). 2016, 47(6):2001-2006.
[25] 苏立君, 张宜健, 王铁行. 不同粒径级砂土渗透特性试验研究[J]. 岩土力学, 2014, 35(5):1289-1294.
SU li-jun, ZHANG yi-jian, WANG tie-xing. Investigation on permeability of sands with different particle sizes[J]. Rock and Soil Mechanics, 2014, 35(5):1289-1294.