Influence of a Super-Large Diameter Shield Tunnel Excavation on the Lining Structure of the Metro Lines in Operation

被引：3
|
作者：
Zhang, Xue [1 ]
Zhang, Mengxi [1 ]
Javadi, Akbar A. [2 ]
机构：
[1] Shanghai Univ, Sch Mech & Engn Sci, Shanghai 200444, Peoples R China
[2] Univ Exeter, Coll Engn Math & Phys Sci, Dept Engn, Exeter EX4 4QF, England
来源：
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING | 2023年 / 47卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Super-large; Shield tunnel; Excavation; Metro lines in operation; Lining structure; DEFORMATION; VIBRATION; BEHAVIOR;
D O I：
10.1007/s40996-023-01199-3
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In central areas of large cities, it is necessary to ensure the safety of the existing tunnel during the construction of a super-large diameter shield tunnel. Given the rapid development of the over-lapping tunnel excavation in recent years, detailed study of the stress and deformation responses under trains' dynamic and vibration loads when a super-large diameter shield tunnel passes through the existing tunnels is essential to improve the stability of metro lines in operation. This study presents the influence of a super-large diameter shield tunnel excavation on the existing tunnel in the Shanghai North Cross Channel project. In this study, the construction disturbance of a super-large diameter shield tunnel and the influence of trains' dynamic and vibration loads on the existing tunnel are considered. The results of numerical simulations show that there are differences in the dynamic response amplitudes of segments at different positions under the combined action of new tunnel excavation loadings and trains' dynamic and vibration loads. The strong dynamic response area of the displacement and acceleration of the lining structure is mainly located at the bottom of the segment ring. The maximum compressive stress of segments appears at the arch waist of the tunnel, and the maximum tensile stress appears in arch crown.
引用
收藏
页码：3851 / 3866
页数：16
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