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联结式排桩隔振系统及其数值模拟

陆建飞, 张旭, 李传勋

陆建飞, 张旭, 李传勋. 联结式排桩隔振系统及其数值模拟[J]. 岩土工程学报, 2014, 36(7): 1316-1325. DOI: 10.11779/CJGE201407016
引用本文: 陆建飞, 张旭, 李传勋. 联结式排桩隔振系统及其数值模拟[J]. 岩土工程学报, 2014, 36(7): 1316-1325. DOI: 10.11779/CJGE201407016
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LU Jian-fei, ZHANG Xu, LI Chuan-xun. Vibration isolation system for linked pile rows and its numerical simulation[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(7): 1316-1325. DOI: 10.11779/CJGE201407016
Citation: LU Jian-fei, ZHANG Xu, LI Chuan-xun. Vibration isolation system for linked pile rows and its numerical simulation[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(7): 1316-1325. DOI: 10.11779/CJGE201407016
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联结式排桩隔振系统及其数值模拟  English Version

  • 江苏大学土木工程与力学学院,江苏 镇江 212013

基金项目: 国家自然科学基金项目（51078171）
详细信息
    作者简介:

    陆建飞(1967- ),男,江苏南通人,博士,教授,博士生导师,主要从事岩土工程、固体力学等领域的研究。E-mail: ljfdoctor@yahoo.com。

Vibration isolation system for linked pile rows and its numerical simulation

  • Department of Civil Engineering, Jiangsu University, Zhenjiang 212013, China

摘要

    摘要
  • 摘要: 在低频入射波作用下,传统的自由式排桩结构的隔振效果并不理想。基于此,提出了一种新型的排桩隔振结构,即联结式排桩,并建立了数值模型对其隔振效果进行数值模拟。为了建立联结式排桩的隔振计算模型,利用序列Fourier变换及边界元方法,建立了波数域内桩-土耦合的边界元模型。基于上述边界元模型,利用桩顶和梁端的联结条件,波数域内的周期性条件及上部联结梁的传递矩阵,建立了波数域内联结式排桩的计算模型。对排桩波数域内的解进行序列Fourier逆变换,即得空间域内排桩的解。基于所建立的模型,本文研究了在圆形载荷作用下,单排及双排联结式排桩的隔振效果。数值结果表明,联结式排桩的隔振效果要明显优于自由式排桩,因此,联结式排桩是一种更为有效的隔振设施。
    Abstract: The conventional pile rows can not achieve a good vibration isolation effect when exposed to low-frequency incident waves. In view of this, a new kind of pile structure, namely, linked periodic pile rows, is proposed for the vibration isolation facility in this study. Moreover, a numerical model is developed for the simulation of the vibration isolation via linked periodic pile rows. To establish the numerical model for the linked periodic pile rows, a wave number domain boundary element method (WDBEM) model for the half-space soils and periodic pile rows is established using the sequential Fourier transform and the boundary element method. By using the WDBEM model, the coupling conditions between the pile tops and the linking beams, and the periodicity condition for the periodic system as well as the transfer matrices for the linking beams, a wave number domain numerical model for the linked periodic pile rows is proposed. By means of the proposed model, the vibration isolation effects of a single linked pile row and two linked pile rows are investigated. The numerical results indicate that compared with the conventional pile rows, the linked pile rows usually produce a better vibration isolation effect. Hence, the linked pile rows are a more effective vibration isolation facility than the conventional pile ones.
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出版历程
  • 收稿日期:  2013-06-04
  • 发布日期:  2014-07-24

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