地铁隧道TBM施工围岩振动效应的数值分析

发布时间：2018-05-13 20:33

本文选题：隧道掘进机 + 地铁隧道　；参考：《长江科学院院报》2014年07期

【摘要】：为分析TBM施工地铁隧道引起的围岩振动效应及其影响,通过数值模拟并结合频谱分析方法,获得地表以及围岩振动的振速峰值和主振频率参数,分析不同掘进速度下TBM施工振动在地表和围岩中的分布,参考爆破安全规程给出的安全允许质点振动速度限值,评估振动影响范围。结果表明:在隧道轴线两侧6D(D为隧道直径)范围内TBM施工振动影响明显,超过6D范围后振动幅值较小,为振动微影响区;随着刀盘掘进速度降低,振速峰值减小,但二者不是线性关系;地表质点振动的主振频率一般在10~25 Hz范围,受掘进速度的影响不明显。
[Abstract]:In order to analyze the vibration effect of surrounding rock caused by TBM construction subway tunnel and its influence, the peak vibration velocity and main vibration frequency parameters of surface and surrounding rock vibration were obtained by numerical simulation and frequency spectrum analysis. This paper analyzes the distribution of TBM construction vibration in the surface and surrounding rock under different tunneling velocities, and evaluates the influence range of vibration by referring to the limit value of permissible particle vibration velocity given by blasting safety rules. The results show that the vibration effect of TBM construction is obvious in the range of tunnel axis (6D(D is tunnel diameter), and the vibration amplitude is smaller than 6D, which is the vibration micro-influence area, and the peak value of vibration velocity decreases with the decrease of the driving speed of the cutter head. However, the main vibration frequency of ground particle vibration is generally in the range of 10 ~ 25 Hz, which is not obviously affected by the tunneling velocity.
【作者单位】：上海交通大学船舶海洋与建筑工程学院;
【基金】：住房和城乡建设部科技资助项目(2011-K3-28)
【分类号】：U455.4;U456.3

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