Three-dimensional effects of multiple voids behind lining on the mechanical behavior of tunnel structure
成果归属作者：
成果归属机构：
作者：
Ye, Zijian ; Yang, Yuyou ; Ye, Ying
单位：
China Univ Geosci Beijing, Sch Engn & Technol, Beijing 100083, Peoples R China;Beijing Jiaotong Univ, Key Lab Urban Underground Engn, Minist Educ, Beijing 100044, Peoples R China;Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China;Beijing Municipal Engn Res Inst, Beijing Key Lab Underground Engn Construct Predict, Beijing 100037, Peoples R China
关键词：
EROSION VOIDS
摘要：
Multiple voids often exist simultaneously behind the tunnel lining, which can seriously threaten the sta-bility of a tunnel's structure. To explore the three-dimensional effects of multiple voids behind the lining on structural mechanical behavior, we conducted a quality evaluation of the concrete lining in a railway tunnel based on model tests and numerical analyses. The effects of the void area and distribution on the structural stress, internal force, and contact pressure of the lining were explored and summarized. Results reveal the following: (1) the direction of the maximum principal stress of lining structural elements within the void region gradually changed to a longitudinal distribution along the tunnel; (2) the struc-tural internal force between each void increased as the distance between voids decreased; (3) the struc-tural contact pressure between each void increased significantly when the distance between voids was less than half of the void's diameter.(c) 2022 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Ain Shams Uni-versity. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/ by-nc-nd/4.0/).
基金：
Key Laboratory of Urban Underground Engineering of Ministry of Education,Beijing Jiaotong University [TUL2021-02]
语种：
英文
来源：
AIN SHAMS ENGINEERING JOURNAL,2023(4):.
出版日期：
2023-04-05
提交日期：
2023-02-25
引用参考：
Ye, Zijian; Yang, Yuyou; Ye, Ying. Three-dimensional effects of multiple voids behind lining on the mechanical behavior of tunnel structure[J]. AIN SHAMS ENGINEERING JOURNAL,2023(4):.