Abstract：Based on the notable characteristic of the quasi-rectangular shield tunnel lining that the direction of the moment at the longitudinal joint is definite, the positions of the longitudinal joint bolts are optimized. Full-scale ring tests were conducted on one normal tunnel ring and one designed with the optimization method. The deformation of the lining, the deformation of the joints and the development of bolt strains were compared and analyzed. Furthermore, the mechanical performance, the failure mechanism, the ultimate bearing capacity and the robustness index were studied. The research results show that the optimization of bolt positions at longitudinal joints had little effect on the mechanical performance in the structural design stage. For the tunnel lining with the optimum design, the mechanical performance in cracking stage are improved significantly. The overall stiffness of the structure is raised and the ultimate bearing capacity is increased by 30%. The failure mode is ductile failure with plastic hinge mode, so the overall safety of the optimized structure is improved.
柳献 叶宇航 刘震 杨志豪 朱瑶宏 . 连接螺栓对类矩形盾构隧道结构极限承载力影响的试验研究与分析[J]. 土木工程学报, 2018, 51(8): 81-88.
Liu Xian Ye Yuhang Liu Zhen Yang Zhihao Zhu Yaohong . Experimental investigation and analysis on effect of connecting bolts on ultimate bearing capacity of quasi-rectangular shield tunnel. 土木工程学报, 2018, 51(8): 81-88.
