双圆盾构隧道衬砌不同内力计算模型对比分析

盾构隧道衬砌结构的内力大小及分布规律对衬砌管片的设计和施工控制具有重要的意义,尽管单圆盾构的内力计算模型已经比较成熟,但对于双圆盾构的内力计算仍有待进一步研究.文章拟对目前国内所采用的双圆盾构内力计算模型进行综合分析,并与所建议的双圆盾构梁-弹簧法比较分析表明:在相同边界条件下,双圆盾构衬砌结构的内力解析解获得的轴力和弯矩值一般偏大,数值解最小,而实测值介于二者之间,但不同方法计算结果所表现的分布规律基本一致,证明作者所提出的双圆盾构梁-弹簧模型可为双圆盾构衬砌结构的设计和施工提供参考依据.

Comparison and Analysis of Different Computational Models of Internal Force for DOT Shield-driven Tunnel Lining

The internal force of shield-driven tunnel lining,especially its value and distribution law,plays an important role in the designing segment lining and construction control.So the comprehensive research of internal force in DOT Shield-driven Tunnel Lining widely used in our country was carried out and the results were compared with those by beam-spring model that is proposed in this paper.The results show:the axial force and bending moment got by three methods,namely the analytical solution,numerical solution and in-situ measuring data,are different.The analytical solution value is the largest,the numerical simulation value is the smallest and the measuring value is in the middle.However,the distribution law of internal force for these three methods is in good agreement.It is demonstrated that:the beam-spring model can serve as a reference for the design and construction of the DOT Shield-driven Tunnel Lining.