缺陷桩周围成层土振动响应解析解及其在旁孔透射波法中的应用

doi:10.13722/j.cnki.jrme.2018.0707

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摘要通过建立缺陷桩–成层土耦合计算模型，考虑桩周土的三维轴对称振动，求解得到桩身竖向振动下周围土响应的频域解析解，并通过傅里叶逆变换得到其在时域内的半解析表达。在此基础上建立简化模型，并将解析解与有限元软件分析结果进行对比，证明了本文解的合理性。随后，分别考虑了缺陷桩–均质土、完整桩–成层土及缺陷桩–成层土各工况参数对桩周土振动响应的影响，并得到桩周土的波动规律，其可为旁孔透射波法的现场应用提供指导。此外，还针对该测试方法涉及的主要技术参数展开了进一步研究，明确了注意事项。

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	吴君涛1
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	肖偲1
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关键词 ：桩基础, 缺陷桩, 成层土, 旁孔透射波法, 傅里叶变换, 有限元

Abstract：A defect pile-layered soil coupled model considering the three-dimensional symmetric vibration of surrounding soil was proposed. An analytical solution of dynamic responses of surrounding soil subjected to the vertical vibration of piles in frequency domain was deduced and，further，a semi-analytical expression in time domain was obtained by applying inverse Fourier transform. A simplified model was then proposed，and the validity of the presented solution was proved by compared with the result solved by FEA software. Parameters in three cases of defect pile-homogeneous soil，intact pile-layered soil and defect pile-layered soil were discussed to research their influence on dynamic responses of surrounding soil，and the response law of pile-surrounding soil was concluded. Furthermore，some parameters of the parallel seismic method were also studied as well to further clarify considerations. The results can guide the application of the parallel seismic method on site.

Key words： pile foundations defect piles multi-layered soil parallel seismic method Fourier transform；FEA

引用本文:

吴君涛1，2，王奎华1，2，刘鑫1，2，肖偲1，2. 缺陷桩周围成层土振动响应解析解及其在旁孔透射波法中的应用[J]. 岩石力学与工程学报, 2019, 38(1): 203-216.
WU Juntao1，2，WANG Kuihua1，2，LIU Xin1，2，XIAO Si1，2. An analytical solution of dynamic responses of multi-layered soil around defect piles and its application in parallel seismic method. , 2019, 38(1): 203-216.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2018.0707 或 http://www.rockmech.org/CN/Y2019/V38/I1/203

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