Mechanical Behavior of Double-Arch Tunnels under the Effect of Voids on the Top of the Middle Wall

Mechanical Behavior of Double-Arch Tunnels under the Effect of Voids on the Top of the Middle Wall

Voids behind linings may affect the safety and performance of structures. In this paper, the applicability of the extended finite element method for simulating crack propagation was verified firstly through comparisons between numerical simulations and model tests. Moreover, the mechanical behavior...

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Bibliographic Details
Main Authors: Bo Min, Xu Zhang, Chengping Zhang, Yanping Gong, Tengfei Yuan
Format: Article
Language:English
Published: MDPI AG 2018-12-01
Series:Symmetry
Subjects:
double-arch tunnel
numerical analysis
physical model test
voids
internal forces
lining cracks
Online Access:https://www.mdpi.com/2073-8994/10/12/703
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spelling doaj-119635ea1c374156a91173f6e32d05632020-11-25T00:55:44ZengMDPI AGSymmetry2073-89942018-12-01101270310.3390/sym10120703sym10120703Mechanical Behavior of Double-Arch Tunnels under the Effect of Voids on the Top of the Middle WallBo Min0Xu Zhang1Chengping Zhang2Yanping Gong3Tengfei Yuan4Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, ChinaKey Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, ChinaKey Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, ChinaKey Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, ChinaKey Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, ChinaVoids behind linings may affect the safety and performance of structures. In this paper, the applicability of the extended finite element method for simulating crack propagation was verified firstly through comparisons between numerical simulations and model tests. Moreover, the mechanical behavior of double-arch tunnels under effects of voids on the top of the middle wall was investigated numerically. Two factors, including void size and tunnel shape, were mainly investigated. The main results obtained were explored including internal forces, deformation and fracturing of the liner. The results showed that voids produced adverse effects on the liner. Internal forces on the liner experienced significant changes and the deformation of the liner increased. Besides, larger crack depth was observed at the crown and the connection between the spandrel and middle wall, indicating a significant decrease in bearing capacity of the structure compared with tunnels without voids.https://www.mdpi.com/2073-8994/10/12/703double-arch tunnelnumerical analysisphysical model testvoidsinternal forceslining cracks
collection DOAJ
language English
format Article
sources DOAJ
author Bo Min
Xu Zhang
Chengping Zhang
Yanping Gong
Tengfei Yuan
spellingShingle Bo Min
Xu Zhang
Chengping Zhang
Yanping Gong
Tengfei Yuan
Mechanical Behavior of Double-Arch Tunnels under the Effect of Voids on the Top of the Middle Wall
Symmetry
double-arch tunnel
numerical analysis
physical model test
voids
internal forces
lining cracks
author_facet Bo Min
Xu Zhang
Chengping Zhang
Yanping Gong
Tengfei Yuan
author_sort Bo Min
title Mechanical Behavior of Double-Arch Tunnels under the Effect of Voids on the Top of the Middle Wall
title_short Mechanical Behavior of Double-Arch Tunnels under the Effect of Voids on the Top of the Middle Wall
title_full Mechanical Behavior of Double-Arch Tunnels under the Effect of Voids on the Top of the Middle Wall
title_fullStr Mechanical Behavior of Double-Arch Tunnels under the Effect of Voids on the Top of the Middle Wall
title_full_unstemmed Mechanical Behavior of Double-Arch Tunnels under the Effect of Voids on the Top of the Middle Wall
title_sort mechanical behavior of double-arch tunnels under the effect of voids on the top of the middle wall
publisher MDPI AG
series Symmetry
issn 2073-8994
publishDate 2018-12-01
description Voids behind linings may affect the safety and performance of structures. In this paper, the applicability of the extended finite element method for simulating crack propagation was verified firstly through comparisons between numerical simulations and model tests. Moreover, the mechanical behavior of double-arch tunnels under effects of voids on the top of the middle wall was investigated numerically. Two factors, including void size and tunnel shape, were mainly investigated. The main results obtained were explored including internal forces, deformation and fracturing of the liner. The results showed that voids produced adverse effects on the liner. Internal forces on the liner experienced significant changes and the deformation of the liner increased. Besides, larger crack depth was observed at the crown and the connection between the spandrel and middle wall, indicating a significant decrease in bearing capacity of the structure compared with tunnels without voids.
topic double-arch tunnel
numerical analysis
physical model test
voids
internal forces
lining cracks
url https://www.mdpi.com/2073-8994/10/12/703
work_keys_str_mv AT bomin mechanicalbehaviorofdoublearchtunnelsundertheeffectofvoidsonthetopofthemiddlewall
AT xuzhang mechanicalbehaviorofdoublearchtunnelsundertheeffectofvoidsonthetopofthemiddlewall
AT chengpingzhang mechanicalbehaviorofdoublearchtunnelsundertheeffectofvoidsonthetopofthemiddlewall
AT yanpinggong mechanicalbehaviorofdoublearchtunnelsundertheeffectofvoidsonthetopofthemiddlewall
AT tengfeiyuan mechanicalbehaviorofdoublearchtunnelsundertheeffectofvoidsonthetopofthemiddlewall
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