Dynamic response analysis of middle pillar for ultra-small spacing tunnels under train vibration loads

被引：0

作者：

Wang S. ^{[1
,2
]}

Shi K. ^{[1
]}

He Y. ^{[3
]}

Wang X. ^{[4
]}

机构：

[1] International Joint Research Laboratory of Henan Province for Underground Space Development and Disaster Prevention, Henan Polytechnic University, Jiaozuo

[2] School of Minerals and Energy Resources Engineering, University of New South Wales, Sydney, 2052, NSW

[3] Institute of National Defense Engineering, Academy of Military Sciences, Luoyang

[4] School of Engineering, Zhejiang University City College, Hangzhou

来源：

Journal of Engineering Science and Technology Review | 2019年 / 12卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Double-track tunnel; Dynamic response; Middle pillar; Ultra-small spacing;

D O I：

10.25103/jestr.123.05

中图分类号：

学科分类号：

摘要：

The ultra-small spacing tunnels are widely used in the urban subway. However, due to the narrow and unstable of the middle pillar of the ultra-small spacing tunnels, these tunnels are easy to be damaged under the vibration loads of train. To ensure the middle pillar stability of the ultra-small spacing tunnels, taking Gangding-Shipaiqiao ultra-small spacing tunnels (0-200 mm) on Guangzhou Metro Line 3 in China as engineering background, the dynamic response characteristics of middle pillar under different speeds of single (double) trains in different cross-section types tunnels were analyzed by using ABAQUS. The superposition coefficient of train vibration excitation expression was proposed, and the fitting vibration equations of three different train speeds were obtained, which mainly involved the vertical acceleration, vertical velocity, vertical displacement and horizontal displacement of the middle pillar. Results show that the higher the speed of the train, the greater the influence on the middle pillar. Compared with the asymmetric tunnel section, the symmetrical tunnel section has less influence on the middle pillar, especially on the dynamic response of the horizontal displacement. The conclusions obtained in this work provide reference value for the design and construction of ultra-small spacing tunnels. © 2019 Eastern Macedonia and Thrace Institute of Technology.

引用

页码：30 / 37

页数：7

共 18 条

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