Numerical Calculation of Internal Force of Segment Lining in Shield Tunnel

10.6919/ICJE.202205_8(5).0031

Wenli Lv；Jie Jiang；Xinyu Liu；Liang Liu

Tunnel Engineering ； Numerical Simulation ； Load Structure Model ； Segment Internal Force

International Core Journal of Engineering

8卷5期（2022 / 05 / 01）

255 - 267

英文

Combined with the example data of Xihe shield tunnel project, taking numerical simulation as the main means, the mechanical model of segment lining of shield tunnel for oil and gas pipeline is constructed by using load structure model in structural calculation. Four segments with different thicknesses of 300mm, 250mm, 200mm and 100mm are selected for numerical simulation calculation, and the deformation diagram and internal force diagram of shield tunnel segment lining under the same load are obtained. The numerical simulation results show that when the segment thickness changes, the deformation and internal force also increase or decrease. The safety conditions of 8 typical points on the lining structure are checked and calculated by limit state method and allowable stress method. It is found that it is unsafe to use 100mm thick segment lining, and the 250mm thick segment used in the actual project meets the requirements.

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