单排空心管桩屏障对平面SV波的隔离效果研究  

Study on effect of barrier of a row of hollow pipe piles on isolation of incident plane SV waves

作　　者：徐平[1] 夏唐代[1] 周新民[1] 

机构地区：[1]浙江大学岩土工程研究所

出　　处：《岩土工程学报》2007年第1期131-136,共6页Chinese Journal of Geotechnical Engineering

摘　　要：参考圆柱坐标系下一排圆柱体对弹性波的多重散射,根据桩土界面处应力和位移连续的条件,得到了非连续空心管桩屏障对入射平面SV波散射系数的理论解。通过引入无量纲位移幅值,即屏障后土体的竖向位移与入射平面SV波引起的竖向位移的比值,比较了不同形式的屏障对入射平面SV波的隔离效果。讨论了桩间距、屏障的位置和管桩的剪切模量(刚度)对单排空心管桩屏障对平面SV波隔离效果的影响,为非连续屏障的隔振设计提供了理论依据。According to the multiple scattering of elastic waves by a row of cylinders in cylindrical coordinate systems, supposing that the interface of hollow pipe piles and soils was coherent, and stresses and displacements were continuous, a theoretical solution of scattering coefficients of incident plane SV Waves by the barrier of a row of hollow pipe piles was obtained. By studying the normalized vertical displacement amplitude, the ratio of vertical displacement amplitude of soils behind the barrier to the amplitude of the incident SV waves, the effects of different types of barriers on the isolation of incident plane SV waves were compared, and the influence of displacement between the center of the two adjacent hollow pipe piles, the location of the barriers and the shear modulus or rigidness of the hollow pipe piles on the effect of isolation of the incident plane SV waves were discussed, and it would provide theoretical basis for the design of discontinuous barrier for vibration isolation.

关 键 词：空心管桩 非连续屏障 平面SV波 隔振设计 

分 类 号：TU435[建筑科学—岩土工程]