考虑施工扰动效应时大直径扩底桩纵向振动阻抗研究

doi:10.13722/j.cnki.jrme.2016.0588

摘要
图/表
参考文献(25)
相关文章 (15)

全文: PDF (2494 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要

基于Rayleigh-Love杆模型研究考虑施工扰动效应时大直径扩底桩的纵向振动阻抗。首先，分别采用虚土桩模型和径向圈层间的剪切复刚度传递法考虑施工扰动造成的桩端以下土体的竖向非均质性和桩周土的径向非均质性；然后，求解桩–土界面的剪切复刚度，将其代入到桩的纵向振动控制方程中，通过Laplace变换和阻抗函数递推的方法，得到大直径扩底桩纵向振动频域响应解析解，在此基础上，通过与已有研究成果的对比，证明本文解的合理性；最后，通过参数分析的方法，在桩基动力设计中比较关心的低频范围内研究了桩的扩底参数以及施工扰动效应对大直径扩底桩纵向振动阻抗的影响，结果表明：(1) 扩底半径对桩的动力特性的影响远大于扩底段长度的影响；(2) 施工扰动效应对大直径扩底桩的动力特性影响显著，且桩周土扰动的影响要强于桩端以下土体扰动的影响。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	李振亚1
	2
	王奎华1
	2
	吴文兵3

关键词 ：桩基础, 大直径扩底桩, 纵向振动, 复阻抗, 施工扰动效应, 剪切复刚度传递法, 虚土桩

Abstract：

Based on the Rayleigh-Love rod model，the longitudinal dynamic impedance of a large-diameter belled pile is theoretically investigated considering the construction disturbance effect. First，the virtual soil pile model and the shear complex stiffness transfer method are adopted to simulate the vertical inhomogeneity of the pile end soil and the radial inhomogeneity of the surrounding soil caused by the construction disturbance effect，respectively. Then，the shear complex stiffness at the pile-soil interface is solved and is substituted into the governing equation of the pile. Meanwhile，the analytical solution for the dynamic response at the pile head is obtained in the frequency domain by virtue of impedance function transfer method and Laplace transform method. On this basis，comparisons with published solutions are carried out to verify the reliability of the present solution. Finally，by means of parametric analysis method，the influence of pile parameters and the construction disturbance effect on the complex impedance at the pile head is investigated within the low frequency range concerned in the design of dynamic foundation. The results show that：(1) the influence of the radius of the enlarged base on the complex impedance at the pile head is much greater than that of the length of the enlarged base. (2) The dynamic characteristic of the large-diameter belled pile is greatly affected by the construction disturbance effect，besides，the influence of the disturbance of the pile surrounding soil is greater than that of the disturbance of the pile end soil.

Key words： pile foundation large-diameter belled pile longitudinal vibration complex impedance construction disturbance effect shear complex stiffness transfer method virtual soil pile

引用本文:

李振亚1，2，王奎华1，2，吴文兵3 . 考虑施工扰动效应时大直径扩底桩纵向振动阻抗研究[J]. 岩石力学与工程学报, 2017, 36(S1): 3678-3688.
LI Zhenya1，2，WANG Kuihua1，2，WU Wenbing3. Longitudinal dynamic impedance of a large-diameter belled pile considering construction disturbance effect. , 2017, 36(S1): 3678-3688.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2016.0588 或 https://rockmech.whrsm.ac.cn/CN/Y2017/V36/IS1/3678

[1]	高盟，王滢，高广运，等. 一种大直径扩底桩端阻力和侧阻力的确定方法[J]. 岩土力学，2013，34(3)：797-801.(GAO Meng，WANG Ying，GAO Guangyun，et al. A method for determining tip and side resistances of large diameter pedestal pile[J]. Rock and Soil Mechanics，2013，34(3)：797-801.(in Chinese))
[2]	高广运，张蕾，滕延京，等. 一种确定大直径扩底桩极限承载力的新方法[J]. 岩土工程学报，2010，32(增2)：55-58.(GAO Guangyun，ZHANG Lei，TENG Yanjing，et al. New method for determining failure load of large diameter belled pile[J]. Chinese Journal of Geotechnical Engineering，2010，32(Supp.2)：55-58.(in Chinese))
[3]	高广运，杨成斌，高盟，等. 持力层对大直径扩底灌注桩竖向承载性状的影响[J]. 岩土工程学报，2012，34(7)：1 184-1 191.(GAO Guangyun，YANG Chengbin，GAO Meng，et al. Influence of bearing stratum on vertical bearing behaviors of large diameter cast-in-place belled piles[J]. Chinese Journal of Geotechnical Engineering，2012，34(7)：1 184-1 191.(in Chinese))
[4]	高盟，高广运，顾宝和，等. 一种大直径扩底桩的沉降计算实用方法[J]. 岩土工程学报，2012，34(8)：1 448-1 452.(GAO Meng，GAO Guangyun，GU Baohe，et al. Practical method for settlement calculation of large-diameter belled piles[J]. Chinese Journal of Geotechnical Engineering，2012，34(8)：1 448-1 452.(in Chinese))
[5]	张蕾，高广运. 大直径扩底桩尺寸效应的影响分析[J].岩土工程学报，2011，33(增2)：83-87.(ZHANG Lei，GAO Guangyun. Size effect of large-diameter belled piles[J]. Chinese Journal of GeotechnicalEngineering，2011，33(Supp.2)：83-87.(in Chinese))
[6]	NOGAMI T，KONAGAI K. Time domain flexural response of dynamically loaded single piles[J]. Journal of Engineering Mechanics，1988，114(9)：1 512-1 525.
[7]	丁选明，刘汉龙. 低应变下变阻抗薄壁管桩动力响应频域解析解[J].岩土力学，2009，30(6)：1 793-1 798.(DING Xuanming，LIU Hanlong. Analytical solution in frequency domain of dynamic response of thin-wall pipe piles with variable wave impedance under low strain transient concentrated load[J]. Rock and Soil Mechanics，2009，30(6)：1 793-1 798.(in Chinese))
[8]	DING XM，LIU HL，LIU JY，et al. Wave propagation in a pipe pile for low-strain integrity testing[J]. Journal of Engineering Mechanics，ASCE，2011，137(9)：598-609.
[9]	NOVAK M. Vibration of floating pile[J]. Journal of Engineering Mechanics Division ASCE，1977，103(1)：153-168.
[10]	NOVAK M，NOGAMI T，ABOUL-ELLA F. Dynamic soil reactions for plane strain case[J]. Journal of Engineering Mechanics Division，ASCE，1978，104：953-959.
[11]	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.(WANG Kuihua，LI Zhenya，LUShuhui，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.(in Chinese))
[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，2005，24(8)：1362-1370.(WANG Kuihua，QUE Renbo，XIA Jianzhong. 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，2005，24(8)：1362-1370.(in Chinese))
[13]	WU WB，WANG KH，ZHANG ZQ，et al. Soil-pile interaction in the pile vertical vibration considering true three-dimensional wave effect of soil[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2013，37(17)：2860-2876.
[14]	WU W B，JIANG G S，HUANG S G，et al. Vertical dynamic response of pile embedded in layered transversely isotropic soil[J]. Mathematical Problems in Engineering，2014：ID 126916. http：//dx.doi.org/10.1155/2014/126916.
[15]	李强，王奎华，谢康和.饱和土中大直径嵌岩桩纵向振动特性研究[J].振动工程学报，2005，18(4)：500-505.(LI Qiang，WANG Kuihua，XIE Kanghe. Dynamic response for vertical vibration of large diameter pile in saturated soil[J]. Journal of Vibration Engineering，2005，18(4)：500-505.(in Chinese))
[16]	LUSH，WANG KH，WU WB，et al. Longitudinal vibration of a pile embedded in layered soil considering the transverse inertia effect of pile[J]. Computers and Geotechnics，2014，62：90-99.
[17]	杨骁，唐洁.成层饱和土中考虑横向惯性的单桩纵向振动[J].岩土力学，2013，34(6)：1560-1566.(YANG Xiao，TANG Jie. Verticalvibration of single pile with transversal inertia effect in saturated soil[J]. Rock and Soil Mechanics，2013，34(6)：1560-1566.(in Chinese))
[18]	LI ZY，WANG KH，WU WB，et al. Vertical dynamic impedance of large-diameter pile considering its transverse inertia effect and construction disturbance effect[J]. Marine Georesources andGeotechnology，2016. DOI：10.1080/1064119X.2016.1149259.
[19]	EL NAGGAR M H. Vertical and torsional soil reactions for radial inhomogeneous soil layer[J]. Structural Engineering and Mechanics，2000，20(4)：299-312.
[20]	杨冬英，王奎华.非均质土中基于虚土桩法的桩基纵向振动[J].浙江大学学报：工学版，2010，44(10)：2021-2028.(YANG Dongying，WANG Kuihua. Vertical vibration of pile based on fictitious soil-pile model in inhomogeneous soil[J]. Journal of Zhejiang University：Engineering Science，2010，44(10)：2021-2028.(in Chinese))
[21]	王奎华，吴文兵，马少俊，等.桩底沉渣对桩的纵向振动特性影响研究及应用[J].岩土工程学报，2011，33(8)：1227-1234.(WANG Kuihua，WU Wenbing，MA Shaojun，et al. Influence of sediment on vertical dynamic response of pile embedded in inhomogeneous soil and its application[J]. Chinese Journal of Geotechnical Engineering，2011，33(8)：1227-1234.(in Chinese))
[22]	王宁，王奎华.桩底土的成层性对桩体纵向刚度的影响[J].岩石力学与工程学报，2013，32(5)：1042-1048.(WANG Ning，WANG Kuihua. Influence of layering of stratum under pile tip on pile longitudinal stiffness[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(5)：1042-1048.(in Chinese))
[23]	吴文兵，王奎华，武登辉，等.考虑横向惯性效应时楔形桩纵向振动阻抗研究[J].岩石力学与工程学报，2011，30(增2)：3618-3625.(WU Wenbing，WANG Kuihua，WU Denghui，et al. Study of dynamic longitudinal impedance of tapered pile considering lateral inertia effect[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(Supp.2)：3618-3625.(in Chinese))
[24]	YU J，CAI YY，WU WB. Effect of sediment on vertical dynamic impedance of rock-socketed pile with large diameter[J]. Journal of Central South University，2013，20(10)：2856-2862.
[25]	WANG N，WANG KH，WU WB. Analytical model of vertical vibrations in piles for different tip boundary conditions： parametric study and applications[J]. Journal of Zhejiang Univeristy-SCIENCE A：Applied Physics & Engineering，2013，14(2)：79-93.