Abstract As one of the main disasters threatening the safe operation of tunnels, fire can seriously damage or de?
stroy tunnel lining structures. Spalling of a shield tunnel lining may occur due to fire, and the lining is prone to abrupt failure at the joints between segments. Meanwhile, the risk of collapse of tunnel lining structures due to fire is extremely high, thanks to low restraint of the ground around the shield tunnel. Through numerical calculations, we study the temperature characteristics and mechanical behaviors of shield tunnel lining structures under different heating curves and ground elastic restraints—including the temperature field, deformation and internal force distribution of the lining structure system and explore the effects of key factors like buried depth, spalling, staggered erection and segment layout variation on the compound structural system.
Abstract：
As one of the main disasters threatening the safe operation of tunnels, fire can seriously damage or de?
stroy tunnel lining structures. Spalling of a shield tunnel lining may occur due to fire, and the lining is prone to abrupt failure at the joints between segments. Meanwhile, the risk of collapse of tunnel lining structures due to fire is extremely high, thanks to low restraint of the ground around the shield tunnel. Through numerical calculations, we study the temperature characteristics and mechanical behaviors of shield tunnel lining structures under different heating curves and ground elastic restraints—including the temperature field, deformation and internal force distribution of the lining structure system and explore the effects of key factors like buried depth, spalling, staggered erection and segment layout variation on the compound structural system.
SHEN Yi
.Analysis of the Temperature Characteristics and Mechanical Behaviors of Tunnel Structures in Fires[J] MODERN TUNNELLING TECHNOLOGY, 2016,V53(6): 80-88
2016, Vol. 53 