Study on the dynamic response characteristics of road-metro tunnels and surrounding soil under train vibration loads

被引：0
|
作者：
Yang W. [1 ]
Yang L. [1 ]
Liang Y. [1 ]
Qian Z. [1 ]
Guo W. [1 ]
He C. [1 ]
Zhou Y. [1 ]
机构：
[1] Key Laboratory of Transportation Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Sichuan, Chengdu
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2022年 / 41卷 / 08期
基金：
中国国家自然科学基金; 中央高校基本科研业务费专项资金资助;
关键词：
dynamic response; model test; road-metro tunnel; shield tunnel; train vibration load; tunnelling engineering;
D O I：
10.13722/j.cnki.jrme.2021.0904
中图分类号：
学科分类号：
摘要：
In order to study the dynamic response characteristics of road-metro tunnels and surrounding soil under train vibration loads，based on the time domain and frequency domain analysis，the dynamic response characteristics of tunnel segments and internal structures，as well as the attenuation characteristics of vibration wave in the stratum are studied by using the method of model test combined with numerical simulation. The results show that in the full frequency domain under train loads，the dynamic response of tunnel segments increases with the frequency，while the dynamic response of the upper lane of the internal structure first increases(0–140 Hz) and then decreases(140–200 Hz). As for the attenuation amplitude of dynamic response at different positions，the upper lane is the largest，its average attenuation amplitude of response is 20.05 dB，and the attenuation amplitude of the peak acceleration in the corresponding time domain is 72.6%. In addition，the dynamic response of the tunnel structure will increase because of the moving effect of the train vibration load. Specifically，the peak acceleration at the track bed increases by about 105%，the side wall of the internal structure increases by 41.9%，the connection between the side wall and the upper lane increases by 47.3%，and the center of the upper lane increases by 22.3%. In the process of single train vibration load，the displacement of the tunnel structure meets its maximum at the arch bottom，with a peak value of 3.85 mm. © 2022 Academia Sinica. All rights reserved.
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页码：1659 / 1670
页数：11
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