Full-scale experiment on dynamic characteristics of tunnel invert using rubberized concrete

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (16) : 249-254.

JIN Hao1, TIAN Qingrong2, LI Zheng2

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Abstract

With the opening and operation of a large number of subway lines, the problem of railway vibration has been paid more and more attention. In this paper, a full-scale platform of tunnel invert is constructed. Through the vibration experiment, vibration acceleration spectrum, vibration acceleration level, transfer loss, insertion loss was analyzed. The results show that: (1) the vibration reduction frequency of rubberized concrete is mainly in 1 to 63Hz. (2) In 1 to 200Hz, the transfer loss of rubberized concrete is generally greater than that of traditional concrete. (3) In 1 to 100Hz, the insertion loss of rubberized concrete is generally positive. (4) Compared rubberized concrete and traditional concrete, the difference of mean square root of vibration level at the tunnel wall is about 1.9dB. This paper provides the experimental data for the application of rubberized concrete in subway.
Key words：Subway; Track vibration; Rubberized concrete; Tunnel invert; Full-scale experiment

Key words

Subway / Track vibration / Rubberized concrete / Tunnel invert / Full-scale experiment

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JIN Hao1, TIAN Qingrong2, LI Zheng2. Full-scale experiment on dynamic characteristics of tunnel invert using rubberized concrete[J]. Journal of Vibration and Shock, 2022, 41(16): 249-254

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