噪声与振动控制2025，Vol.45Issue(2)：287-292,297,7.DOI:10.3969/j.issn.1006-1355.2025.02.045
小半径曲线段联络通道T接部位振动响应实测研究
Field Measurement Study on Vibration Response of T-shape Junction Consisting of Connection Aisle and Metro Tunnel in Small-radius Curved Sections
摘要
Abstract
The junction composed of connection aisle and main metro tunnel(called as T-shape junction)is a relatively more sensitive and vulnerable component to the train-induced vibration in the metro tunnel.Taking a small-radius curved tunnel section of Ningbo Metro Line 5 as an example,field vibration measurement was conducted on the separated tunnel and T-shape junction consisting of mechanical connection aisle and metro tunnel to reveal the influence of connection aisle on the vibration response of the main metro tunnel.Researches show that peak accelerations at the T-shape junction are smaller than those of the separated tunnel,the peak vertical accelerations of rail,track bed and tunnel wall of the former are decreased by about 11.42%,40%,and 34.21%respectively in comparison with the latter,indicating that the existence of connection aisle has the effect of vibration reduction of the main metro tunnel.Vertical vibration is still the primary vibration form in the small-radius T-shape junction,but the transverse vibration is significant.The peak accelerations on the outer side of the main tunnel are greater than those on the inner side.The overall acceleration levels of the T-shape junction are less than those of the separate tunnel,but the one-third octave acceleration levels of T-shape junction in the low-frequency range are greater.The vibration of the T-shape junction in small-radius section is mainly high-frequency vibration,and the center frequencies of the main vibration frequency bands of rail,track bed,and tunnel wall vibration are around 3 000,2 000,and 1 000 Hz,respectively.The present research may provide a reference for the environmental vibration analysis of the mechan-ical T-shape junction in the metro tunnels.关键词
振动与波/T接部位/联络通道/地铁振动测试/振动加速度/加速度振级/加速度频谱Key words
vibration and wave/T-shape junction/connecting aisle/metro vibration measurement/vibration accelera-tion/vibration acceleration level/acceleration frequency spectrum分类
交通运输引用本文复制引用
黄强,卞士海,马永政,崔正阳,邱波..小半径曲线段联络通道T接部位振动响应实测研究[J].噪声与振动控制,2025,45(2):287-292,297,7.基金项目
国家自然科学基金资助项目(52008214) （52008214）
宁波市自然科学基金资助项目(2023J083) （2023J083）
