地面城轨交通近轨道区域自由地表振动实测研究

王福彤;陶夏新;崔高航;郑鑫;梁德勇;

振动与冲击 ›› 2011, Vol. 30 ›› Issue (5) : 131-135.

PDF(2116 KB)
PDF(2116 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (5) : 131-135.
论文

地面城轨交通近轨道区域自由地表振动实测研究

  • 王福彤1,2;陶夏新1;崔高航4;郑鑫1,3;梁德勇5,1

作者信息 +

In situ experimental study on free field ground vibration near urban railway line

  • Wang Fu-tong1,2; Tao Xia-xin1;Cui Gao-hang4; Zheng Xin1,3; Liang De-yong5,1

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摘要

摘要:城市轨道交通诱发周边地表振动已成为突出的环境振动问题。为考查轨道周边自由地表垂向振动的特性及其传播规律,在北京城铁13号线回龙观至霍营区段进行了现场观测试验。从时域、功率谱和振动级三个方面对获得的数据进行了分析。结果显示:随着与轨道距离的增加,地表加速度峰值明显衰减,振动持时增加;振动优势频率为10-80Hz,近轨道处以高频为主,远离轨道处以低频为主;加权Z振级单调衰减,但分频段振级并非单调衰减,与场地卓越频率接近的频段存在较大的反弹现象;乘客满载和半载对Z振级的影响不大;相对于干线铁路而言,城轨交通地面振动水平较低。

Abstract

Abstract:Ground vibrations induced by urban rail traffic are a major environmental concern in urban areas. In order to study the vertical vibration characteristics and its propagation behavior, an in situ test was carried out near the Line 13 of the Beijing Urban Railway between the Huilongguan Station and the Huoying Station. The responses of the free field ground were analyzed from three aspects as acceleration time histories, power spectra and vibration levels. Results show that the PGA of ground surface displays a pronounced attenuation with the increase of distance from track, while the vibration duration is somewhat prolonged. The dominant frequency ranges from 10Hz to 80Hz, whose lower band is primary for the points near track and upper band is primary for the ones further from track. The weighing VLz monotonic decay with distance, whereas at some frequency points close to natural frequencies of ground, the banded VLzs are amplified notably at certain distances. There is no significant change in the weighing VLz whether coaches are full or not. Comparing with InterCity railways, the urban rail traffic produces a more moderate ground vibration.

关键词

城市轨道 / 地表振动 / 现场测试 / 振动级

Key words

Urban Railway / Ground Vibration / In situ test / Vibration Level

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王福彤;陶夏新;崔高航;郑鑫;梁德勇;. 地面城轨交通近轨道区域自由地表振动实测研究[J]. 振动与冲击, 2011, 30(5): 131-135
Wang Fu-tong;Tao Xia-xin;Cui Gao-hang;Zheng Xin;Liang De-yong;. In situ experimental study on free field ground vibration near urban railway line[J]. Journal of Vibration and Shock, 2011, 30(5): 131-135

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