1.西安科技大学建筑与土木工程学院,陕西 西安 710054
2.信电综合勘察设计研究院有限公司,陕西 西安 710054
3.陕西科技控股集团有限责任公司,陕西 西安 710077
肖迪(1997—),男,硕士研究生。主要从事岩土工程方面的研究。E-mail: xiaodi199710@163.com
段旭(1991—),男,副教授,硕导,博士。主要从事岩土与地下工程方面的研究。E-mail:duanxutim@163.com
收稿:2022-02-28,
修回:2022-05-24,
纸质出版:2023-10-15
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肖迪,段旭,刘武超等.地铁振动作用下上部正交综合管廊动力响应试验研究[J].防灾减灾工程学报,2023,43(05):1151-1159.
XIAO Di,DUAN Xu,LIU Wuchao,et al.Experimental Study on Dynamic Response of Upper Orthogonal Comprehensive Utility Tunnel under Subway Vibration[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(05):1151-1159.
肖迪,段旭,刘武超等.地铁振动作用下上部正交综合管廊动力响应试验研究[J].防灾减灾工程学报,2023,43(05):1151-1159. DOI: 10.13409/j.cnki.jdpme.20220228001.
XIAO Di,DUAN Xu,LIU Wuchao,et al.Experimental Study on Dynamic Response of Upper Orthogonal Comprehensive Utility Tunnel under Subway Vibration[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(05):1151-1159. DOI: 10.13409/j.cnki.jdpme.20220228001.
为揭示地铁振动荷载作用下上部正交管廊的动力响应规律,采用缩尺物理模型试验的方法,利用激振电机模拟地铁列车运行时产生的振动荷载,研究地铁隧道‑黄土地基‑综合管廊传播路径下地铁运行振动的传播规律及管廊结构的动态响应特征。试验结果表明:地铁运行产生的振动由隧道顶部向上部土体传播的过程中表现出先骤减后缓慢减小的规律,加速度响应主要集中于隧道上部40 cm(原型4 m)区间,动态土压力则在隧道顶与其上部管廊垂直间距80 cm(原型8 m)全段均有较明显的响应。上部正交综合管廊顶、侧、底板与周围土体的动态接触压力响应明显,并且在相同振动荷载作用下表现出相对稳定的比例关系。随着地铁振动荷载的增强,上部正交管廊的结构加速度响应逐步增强,而管廊结构与周围土体的动态接触土压力增长幅度更为显著。
In order to reveal the dynamic response law of the upper orthogonal pipe gallery under subway vibration load, a scaled physical model test method was used to simulate the vibration load generated by subway train operation. The dynamic response characteristics of vibration propagation through the subway tunnel-loess foundation-integrated pipe gallery path were studied. Experimental results show that: the vibration generated by subway operation propagates from the top of the tunnel to the upper soil, showing a law of sudden decrease first and then slow decrease. The acceleration response is mainly concentrated in the upper 40 cm (prototype 4 m) section of the tunnel, while the dynamic soil pressure exhibits an obvious response throughout the entire section of 80 cm (prototype 8 m) vertical distance between the tunnel top and the upper pipe gallery. The top, side and bottom plates of the pipe gallery at the central position after the vibration propagates to the upper orthogonal pipe gallery have a strong influence, and show a relatively stable proportional relationship under the same vibration load. As the subway vibration load increases, the acceleration response of the upper orthogonal pipe gallery structure is gradually enhanced, and the increase of the dynamic contact earth pressure between the pipe gallery structure and the surrounding soil becomes more obvious.
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