地铁浮置式轨道引起地表振动响应解析预测模型研究

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (17) : 132-137.

论文

地铁浮置式轨道引起地表振动响应解析预测模型研究

吴宗臻1 ，刘维宁1，马龙祥1，王文斌2

作者信息 +

Study on the analytical prediction model of ground vibration response induced by metro floating-type track

Wu Zong-zhen 1 ,Liu Wei-ning 1,Ma Long-xiang 1,Wang Wen-bin 2

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文章历史 +

摘要

在土层振动传递固有特性的基础上，提出了一种针对地铁浮置式轨道型式引起的地表振动响应的解析预测模型。本模型将地铁环境振动的预测问题转化为计算浮置式轨道作用于基底的频域力群和求解土层振动频响函数的问题，然后通过系统合理简化将两部分进行频域叠加运算得出地表振动响应。采用本模型预测了北京地铁4号线浮置板区间地表振动响应，并与实测数据进行对比分析，结果表明：浮置板区间模型预测和地表实测加速度振动主频均为8~10Hz，且频域幅值相当，变化趋势相符；实测Z振级54.0dB，预测Z振级56.1dB，预测结果较准确。本频域快速预测模型具有预测速度快、预测精度高、可进行频域预测等特点，是现有环评预测方法的有效补充。

Abstract

Based on the vibration transmission characteristics in soil, an analytical prediction model of ground vibration response induced by metro floating-type track is presented. Through the model, the calculation of ground vibration response is transferred to two parts—forces on the base of floating-type track and soil vibration frequency response functions. Then method of superposition in frequency domain is adopted to calculate the ground vibration response induced by metro. The model is used to predict the ground vibration response at the floating slab track section of Beijing Metro Line 4, and in-site measurements is also done to validate the calculated results vibration response. Comparative results show that: the main vibration frequencies of prediction results and measurement results are both around 8~10Hz and they have the same vibration amplitudes in frequency domain. The Z vibration level is 54.0dB for the measurements and 56.1dB for the prediction. The analytical prediction model has characteristics of fast speed, high accuracy and prediction in frequency domain. The model can effectively predict ground vibrations induced by metro. And it’s an effective supplement to the existing environmental assessment prediction methods.

导出引用

吴宗臻;刘维宁;马龙祥;王文斌. 地铁浮置式轨道引起地表振动响应解析预测模型研究[J]. 振动与冲击, 2014, 33(17): 132-137

Wu Zong-zhen ;Liu Wei-ning;Ma Long-xiang;Wang Wen-bin . Study on the analytical prediction model of ground vibration response induced by metro floating-type track[J]. Journal of Vibration and Shock, 2014, 33(17): 132-137