Abstract: Based on a large-diameter tunnel in Jinan, a full-scale numerical analysis model was performed to analysis the temperature field distribution, structural deformation and internal force distribution of the shield tunnel in fire. A thermal-mechanical coupling analysis method for shield tunnel lining structures was proposed. According to the results, the temperature of the inner heating surface area was significantly higher than the outer surface during fire. 300 mm part of the lining from the inner heating surface was not affected by fire. The lining expanded due to the heating in fire. The deformation of the vault and the bottom gradually decreased, the horizontal deformation of the arch waist continued to increased, some segment joints were significantly opened under the effect of fire. Then the stress of lining entered the yield state from the heating surface, while stress redistribution developed and connection bolts partially yield. Finally, the axial force of overall structure decreased and the bending moment increased dramatically. The bending moment of the arch waist even doubled compared with before.
闫治国, 王紫锐, 沈奕, 刘康. 碳氢曲线下大直径盾构隧道结构热力特性分析[J]. 隧道与地下工程灾害防治, .
YAN Zhiguo, WANG Zirui, SHEN Yi, LIU Kang. Analysis on thermal characteristics of linings of large diameter shield tunnels under hydrocarbon curve. Hazard Control in Tunnelling and Underground Engineering, 0, (): 1-15.
