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饱和土中孔列对平面快纵波的隔离效应

Isolation effect of cavity array in saturated soils on plane fast longitudinal waves

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【作者】 李校兵戴鹏燕

【Author】 LI Xiaobing1,2,DAI Pengyan3(1.College of Architecture and Civil Engineering,Wenzhou University,Wenzhou 325035,China;2.MOE Key Laboratory of Soft Soils and GeoenvironmentalEngineering,Zhejiang University,Hangzhou 310027,China;3.Beilun Building Design and Research Institute,Ningbo 315800,China)

【机构】 温州大学建筑与土木工程学院浙江大学软弱土与环境土工教育部重点实验室宁波市北仑区建设设计研究院

【摘要】 在Biot饱和土波动理论的基础上,用单排孔列作为屏障,对全空间饱和土中入射平面快纵波进行了隔离分析。采用波函数展开法,将入射波和散射波的势函数展开成Fourier-Bessel函数的无穷级数的形式,利用一组可以求解多散射问题的圆柱坐标系统和界面处位移连续的条件,得到问题的理论解。对影响隔离效果的孔间距和饱和土的渗透性等参数进行了分析,结果表明,单相弹性土体中孔列隔离效果要比饱和土体差,饱和土的渗透性对隔离效果有较明显的影响,饱和土渗透系数越小,孔列屏障后一定距离处的隔离效果越好。

【Abstract】 In this paper,on the basis of Biot’s dynamic theory,the isolation of one cavity array as barrier for plane fast longitudinal wave is investigated in saturated soils in a homogeneous unbounded space.By using wave functions,the potential functions of incident waves and scattered waves are expanded into infinite series of Fourier-Bessel functions.Theoretical solutions are found by using a set of cylindrical coordinates,which can solve multiple-scattering problems.The influence of cavity spacing and saturated soil permeability coefficient on the isolation effect of cavity array is studied,and the results show that the permeability coefficient of saturated soils has a significant influence on the isolation effect of cavity array compared with single-phase elastic soil.The isolation effect at a certain distance from the cavity array becomes more apparent as the permeability coefficient of saturated soil decreases.

【关键词】 饱和土孔列波函数隔离效果
【Key words】 saturated soilcavity arraywave functionisolation effect
【基金】 建设部科技计划项目(2009K313,2009K315);浙江省自然科学基金项目(Y1110567);温州市科技计划项目(S20080016,S20090034)
  • 【文献出处】 地震工程与工程振动 ,Journal of Earthquake Engineering and Engineering Vibration , 编辑部邮箱 ,2011年02期
  • 【分类号】TU435
  • 【被引频次】1
  • 【下载频次】70
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