饱和土半解析边界元法及在双排桩被动隔振中的应用

›› 2010, Vol. 31 ›› Issue (S2): 59-64.

饱和土半解析边界元法及在双排桩被动隔振中的应用

时刚^1,2，高广运²

1. 郑州大学土木工程学院，郑州 450001；2. 同济大学岩土与地下工程教育部重点实验室，上海 200092

收稿日期:2010-04-25 出版日期:2010-12-10 发布日期:2011-01-12
作者简介:时刚，男，1978年生，博士，讲师，主要从事土动力学、环境岩土方面的研究。
基金资助:
国家自然科学基金项目（No. 50678128，No. 50878155）

Semi-analytical boundary element method in saturated soil and its application to analysis of double row of piles as passive barriers

SHI Gang ^1,2, GAO Guang-yun²

1. School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China；2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China

Received:2010-04-25 Online:2010-12-10 Published:2011-01-12

摘要/Abstract

摘要：

针对均质饱和地基中双排桩远场被动隔振问题，首先，基于饱和多孔介质的边界元法，建立了以薄层法（TLM）基本解作为动力Green函数的饱和土半解析边界元法，该方法可有效地分析饱和半空间的土-结构动力相互作用问题。在此基础上，根据双排桩与周围土体的邻接条件，推导了双排桩对Rayleigh波散射的三维边界元方程；运用上述边界元方程，对双排桩的远场被动隔振问题进行了研究。结果表明：双排桩能够有效地降低屏障后的位移振幅，其隔振效果要优于单排桩；排间净距对隔振效果影响不大，而桩间净距则对双排桩隔振效果起控制作用。

关键词: 饱和地基, 薄层法, 半解析边界元法, 双排桩, 隔振效果

Abstract:

A study of problem of ground vibration isolation by double row of piles as passive barriers in homogeneous saturated ground is introduced. The investigation is accomplished with the aid of the semi-analytical boundary element method(BEM) in cooperation with the basic solution of the thin layered method (TLM). Consequently, a 3D semi-analytical BEM model is put forward, where the TLM basic solution is employed, to use double row of piles as passive barriers taking into account the dynamical interaction of soil-structure. Effect of the model parameters on effectiveness of vibration isolation by double row of piles is investigated and discussed in detail. The results show that the double row of piles can isolate the ground vibrations due to the incident Rayleigh wave, of which the screening efficiency is better than that of a row of piles. Moreover, the net spacing between two rows has less effect on the screening efficiency, while the net spacing between two piles can affect the isolation effectiveness significantly.

Key words: saturated soil, thin layered method, semi-analytical BEM, double row of piles, isolation efficiency

中图分类号:

TU 435

时刚，高广运. 饱和土半解析边界元法及在双排桩被动隔振中的应用[J]. , 2010, 31(S2): 59-64.

SHI Gang, GAO Guang-yun. Semi-analytical boundary element method in saturated soil and its application to analysis of double row of piles as passive barriers[J]. , 2010, 31(S2): 59-64.

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