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目前常用的关于地铁引起的环境振动评价标准是基于单列车的计算分析结果和实测数据。而随着国内迎来了轨道交通建设的黄金时期,大量近距离多孔交叠隧道不断出现,仍沿用基于单列车的环境振动评价方法将无法真实反映实际的振动环境。武汉市轨道交通2号线与4号线工程在洪(洪山广场站)中(中南路站)区间为4孔紧邻交叠隧道,根据实际工程特点,将其中部分隧道简化为不同净距的四孔垂直隧道,建立其三维计算模型,分析了紧邻多孔交叠隧道在不同净距、不同埋深以及不同列车数量作用下的环境振动及其频谱特性,并对计算结果进行了拟合分析,建议了近似经验公式,确定了环境振动影响范围。论文研究成果可供今后类似工程的环境振动预测和评价提供参考。
The commonly used evaluation criteria of environmental vibration caused by the subway are based on the calculation and analysis results of the single train and the measured data. With the domestic ushered in the golden period of rail transit construction, a large number of close-spaced porous overlapping tunnels continue to appear, and still use the method of environmental vibration assessment based on single train will not be able to truly reflect the actual vibration environment. Wuhan Metro Line 2 and Line 4 project in Hong (Hongshan Square Station) (Zhongnan Road Station) interval of 4 holes immediately adjacent to the overlapping tunnel, according to the characteristics of the actual project, some of which will be simplified into a different tunnel four Hole vertical tunnel to establish its three-dimensional calculation model. The environmental vibration and its spectral characteristics of adjacent porous tunnels with different clearances, different depths and different numbers of trains are analyzed. The calculated results are fitted and analyzed, and suggestions The approximate empirical formula, to determine the impact of environmental vibration range. The results of the dissertation can provide reference for the prediction and assessment of environmental vibration of similar projects in the future.