中文摘要：

以青岛地铁为研究背景,采用有限差分软件FLAC3D对地铁运营导致环境振动的传播规律进行了系统研究。重点从振动的传播路径、受振建筑物两方面提出连续屏障和砂垫层隔振两种措施,并采用FLAC3D模拟各自隔振效果。研究表明：对于连续屏障隔振,明沟的隔振效果优于有填充物屏障的隔振效果;振幅衰减系数变化规律表明充填物的弹性模量是影响屏障隔振效果的主控因素,屏障深度和厚度次之;砂垫层具有较好的隔振效果,且其厚度和弹性模量对隔振效果的影响都较显著。

英文摘要：

Based on Qingdao Subway,this paper made a systematic research on the subway-induced vibration propagation behavior of surrounding ground and buildings with the help of FLAC3 D.By focusing on the vibration propagation path and vibration-affected building structures,two vibration isolation methods,namely continuous barrier and sand cushion,were proposed,whose vibration isolation effects were studied respectively by numerical simulation.Results show that for the continuous barrier,the vibration isolation effect of open ditch is much better than that of filled barrier.And the varying pattern of amplitude attenuation coefficient reveals that elastic modulus of barrier filling is the most important factor affecting the vibration isolation effect,with the barrier depth and thickness second to it.However,for the sand cushion,it provides preferable vibration isolation and both its thickness and elastic modulus have remarkable influence on vibration isolation effect.