京津城际铁路桥墩基础场地振动测试与分析

郑水明;曾心传;王 岚;黄 江;

振动与冲击 ›› 2010, Vol. 29 ›› Issue (2) : 167-169.

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振动与冲击 ›› 2010, Vol. 29 ›› Issue (2) : 167-169.
论文

京津城际铁路桥墩基础场地振动测试与分析

  • 郑水明1,2;曾心传1,2;王 岚1,2;黄 江1,2
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TESTING AND ANALYSIS OF GROUND VIBRATION INDUCED BY HIGH-SPEEDTRAIN FOR THE BEIJING-TIANJIN RAILWAY

  • Zheng Shuiming1,2;Zeng Xinchuan1,2;Wang Lan1,2;Huang Jiang1,2
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摘要

为确定京津城际铁路地震预警系统地震仪的触动阀值,在高速列车通过时,对京津城际铁路桥墩基础场地进行了振动测试,并采用最小二乘法及频谱分析获得了桥墩附近场地的振动加速度衰减规律及其频率特性。结果表明,振动加速度幅值在距离桥墩10m范围内衰减很快,且垂直向衰减比水平向快,超过10m范围后,衰减变缓,水平向与垂直向的振动幅值衰减接近;在桥墩附近,加速度水平向及垂直向主振频率分别为37Hz和41Hz,远高于理论预测值;距桥墩70m处安置的地震仪不会被触发。

Abstract

To confirm the value triggered threshold of the seismograph of earthquake warning system for the Beijing-Tianjin railway, the ground vibrations of pier foundations induced by the high-speed train are tested. The acceleration attenuation law and frequency characteristic are obtained by frequency spectrum analysis and the method of least squares. The results show that values of acceleration rapidly decrease and the vertical value more rapidly than horizontal value in the distance of 10 meters from pier, but slowly decrease in the distance more than 10 meters, and vertical and horizontal attenuation are similar. It also shows that the horizontal main frequency is 37Hz,and the vertical value is 41Hz,far more than the value in the theory, and seismograph can not triggered in the distance of 70 meters from pier.

关键词

地震仪 / 地震预警系统 / 频谱分析 / 衰减规律

Key words

seismograph / earthquake warning system / frequency spectrum analysis / acceleration attenuation law

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郑水明;曾心传;王 岚;黄 江;. 京津城际铁路桥墩基础场地振动测试与分析[J]. 振动与冲击, 2010, 29(2): 167-169
Zheng Shuiming;Zeng Xinchuan;Wang Lan;Huang Jiang;. TESTING AND ANALYSIS OF GROUND VIBRATION INDUCED BY HIGH-SPEEDTRAIN FOR THE BEIJING-TIANJIN RAILWAY[J]. Journal of Vibration and Shock, 2010, 29(2): 167-169

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