Physical and mechanical response of large-diameter shield tunnel lining structure under non-uniform fire: A full-scale fire test-based study

被引:2
作者
Jin, Da-Long [1 ,2 ]
Jin, Hui [3 ]
Yuan, Da-Jun [1 ,2 ]
Cheng, Pan-Pan [1 ,2 ]
Pan, Dong [1 ,2 ]
机构
[1] Beijing Jiaotong Univ, Sch Civil Engn, Key Lab Urban Underground Engn, Minist Educ, Beijing 100044, Peoples R China
[2] Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China
[3] Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China
基金
中国国家自然科学基金;
关键词
Large-diameter shield tunnel; Full-scale fire test; Temperature field; Physical damage; Mechanical response; REINFORCED-CONCRETE; BEHAVIOR;
D O I
10.1016/j.undsp.2024.06.001
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
When a fire occurs in an underground shield tunnel, it can result in substantial property damage and cause permanent harm to the tunnel lining structure. This is especially true for large-diameter shield tunnels that have numerous segments and joints, and are exposed to specific fire conditions in certain areas. This paper constructs a full-scale shield tunnel fire test platform and conducts a non-uniform fire test using the lining system of a three-ring large-diameter shield tunnel with an inner diameter of 10.5 m. Based on the tests, the temperature field distribution, high-temperature bursting, cracking phenomena, and deformation under fire conditions are observed. Furthermore, the post-fire damage forms of tunnel lining structures are obtained through the post-fire ultimate loading test, and the corresponding mechanism is explained. The test results illustrate that the radial and circumferential distribution of internal temperature within the tunnel lining, as well as the radial temperature gradient distribution on the inner surface of the lining, have non-uniform distribution characteristics. As a result, the macroscopic phenomena of lining concrete bursting and crack development during the fire test mainly occur near the fire source, where the temperature rise gradient is the highest. In addition, the lining structure has a deformation characteristic of local outward expansion and cannot recover after the fire load is removed. The ultimate form of damage after the fire is dominated by crush damage from the inside out of the lining joints in the fire-exposed area. The above results serve as a foundation for future tunnel fire safety design and evaluation.
引用
收藏
页码:1 / 16
页数:16
相关论文
共 31 条
[1]   Thermal behaviour of unloaded concrete tunnel lining through an innovative large-scale tunnel fire experimental testing setup [J].
Alhawat, Husen ;
Hamid, R. ;
Baharom, S. ;
Azmi, M. R. ;
Kaish, A. B. M. A. .
CONSTRUCTION AND BUILDING MATERIALS, 2021, 283
[2]   Residual strength of hybrid-fiber-reinforced high-strength concrete after exposure to high temperatures [J].
Bing, C ;
Liu, JY .
CEMENT AND CONCRETE RESEARCH, 2004, 34 (06) :1065-1069
[3]  
Britez C., 2020, Alconpat, V10, P1
[4]   A 3D computational fluid dynamics model for assessing the concrete spalling of a tunnel lining in the event of a fire [J].
Caliendo, Ciro ;
Russo, Isidoro .
COMPUTERS AND GEOTECHNICS, 2022, 152
[5]   Structural Fire Safety of Circular Concrete Railroad Tunnel Linings [J].
Caner, A. ;
Boncu, A. .
JOURNAL OF STRUCTURAL ENGINEERING-ASCE, 2009, 135 (09) :1081-1092
[6]   Mechanical properties of steel fibre reinforced concrete exposed at high temperatures [J].
Colombo, Matteo ;
di Prisco, Marco ;
Felicetti, Roberto .
MATERIALS AND STRUCTURES, 2010, 43 (04) :475-491
[7]   A large-scale fire test of an immersed tunnel under the protection of fire resistive coating [J].
Duan, Jintao ;
Dong, Yuli ;
Xiao, Jianzhuang ;
Zhang, Dashan ;
Zheng, Wei ;
Zhang, Shengyao .
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2021, 111
[8]   Characteristics and Countermeasures of Tunnel Heave due to Large-Diameter Shield Tunneling Underneath [J].
Gan, Xiaolu ;
Yu, Jianlin ;
Gong, Xiaonan ;
Zhu, Min .
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES, 2020, 34 (01)
[9]   Design of the metro tunnel project tunnel linings for fire testing [J].
Guerrieri, Maurice ;
Sanabria, Carlos ;
Lee, Wei Ming ;
Pazmino, Esteban ;
Patel, Rahul .
STRUCTURAL CONCRETE, 2020, 21 (06) :2452-2480
[10]  
[胡海涛 Hu Haitao], 2002, [土木工程学报, China Civil Engineering Journal], V35, P44