综合交通枢纽场地土体振动传递特性试验研究  

Experimental Study on Soil Vibration Transmissibility of Integrated Transportation Hubs

作　　者：易兵 高慰 李青良 李小珍[2] 梁林 YI Bing;GAO Wei;LI Qingliang;LI Xiaozhen;LIANG Lin(Chongqing City Transportation Development&Investment Group Co.,Ltd.,Chongqing 430000,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;China Railway Eryuan Engineering Group Co.,Ltd.,Chongqing 430000,China)

机构地区：[1]重庆城市综合交通枢纽开发投资有限公司,重庆430000 [2]西南交通大学桥梁工程系,成都610031 [3]中铁二院重庆勘察设计研究院有限责任公司,重庆430000

出　　处：《噪声与振动控制》2019年第5期162-166,222,共6页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51878565);重庆市应用开发计划重点资助项目(cstc2014yykfB30003)

摘　　要：为研究振动波在场地中的传播规律,以重庆沙坪坝综合交通枢纽为工程背景开展现场试验,得到振动波在 土体中的衰减规律,同时为土体有限元计算参数提供了参考依据。得出的主要结论有:(1)土体不同区域在人工激励 下的振动响应情况略有差异,总体而言,土体的振动优势频域集中在16Hz^250Hz频率范围内。(2)在人工激励下,土 体振动在5m^10m范围内衰减较快,加速度衰减在50%以上,在15m范围以后,振动衰减缓慢,衰减量很小。振动在 同一土体的不同区域衰减规律略有差异,但总体规律一致。(3)在人工激励下,土体竖向振动响应普遍大于水平向振动 响应,且水平向不同方向的振动响应有一定差异。The propagation law of vibration wave in soil ground is studied.The Chongqing Shapingba integrated traffic hub is taken as the engineering background to carry out the field test.The attenuation law of the vibration wave in the soil ground is obtained,which provides the reference for selection of soil parameters for the finite element calculation.The main conclusions are as follows:(1)The vibration response of different soils under artificial excitation is slightly different.In general,the vibration frequency of soil is concentrated in the frequency range of 16 Hz-250 Hz.(2)Under the artificial excitation,the soil vibration in the range of 5 m-10 m decays faster,and the acceleration attenuation is above 50%;in the range beyond 15 m,the vibration attenuation is slow,and the attenuation is very small.The attenuation law of vibration in different areas of the same soil is slightly different,but the general law is consistent.(3)Under the artificial excitation,the vertical vibration response of the soil is generally larger than the horizontal vibration response,and the horizontal vibration responses in different directions are different.

关 键 词：振动与波 土体振动 振动衰减 综合交通枢纽 现场试验 

分 类 号：U24[交通运输工程—道路与铁道工程] TB53[理学—物理]