Abstract Based on a full-scale test to verify the ultimate bearing capacity of a shield tunnel reinforced with a composite cavity, a non-linear additive model that can be used to simulate the structural reinforcement of the shield tunnel is presented, in which the composite cavity and segment are defined by various materials, and the bi-directional spring unit is adopted to simulate the bonding between a non-reinforced tunnel and the composite cavity. Additionally, the effectiveness of the model is verified by means of a comparison with the results of full-scale test. Furthermore, the values of some key parameters are described and the stress on the tunnel structure and failure mechanism are presented based on the simulated results, thereby providing a reference for the reinforcement optimization of operated shield tunnels.
Abstract：
Based on a full-scale test to verify the ultimate bearing capacity of a shield tunnel reinforced with a composite cavity, a non-linear additive model that can be used to simulate the structural reinforcement of the shield tunnel is presented, in which the composite cavity and segment are defined by various materials, and the bi-directional spring unit is adopted to simulate the bonding between a non-reinforced tunnel and the composite cavity. Additionally, the effectiveness of the model is verified by means of a comparison with the results of full-scale test. Furthermore, the values of some key parameters are described and the stress on the tunnel structure and failure mechanism are presented based on the simulated results, thereby providing a reference for the reinforcement optimization of operated shield tunnels.
LIU Xian-1,
ZHANG Le-Le-1,
LI etc
.A Macroscopic Analysis Model for the Mechanical Behaviors of a Shield Tunnel Segment Lining Reinforced with a Composite Cavity[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(5): 78-84
2014, Vol. 51 