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文章依托于徐明高速公路新型装配式管型通道科研课题,针对结构设计中地层弹性反力系数K合理取值专题,系统阐述了通道边界条件的产生机理及边界约束随结构变形的变化趋势,并利用开发的“四构件装配式管型通道设计系统”有限元程序计算和模拟了不同边界约束对结构的影响规律,分析结果可以为包括管通在内的各型通道设计参数K值提供依据,并可应用于实际工程设计。
The article relies on the scientific research project of the new type of fabricated tubular tunnel on Xu-Ming Expressway. According to the topic of reasonable value of strata elastic reaction coefficient K in structural design, the generating mechanism of boundary conditions and the changing trend of boundary constraint with structural deformation are systematically described. The influence of different boundary constraints on the structure was calculated and simulated by using the developed “four-component fabricated tube channel design system” finite element program. The results of the analysis can be used to design the parameters K Provide basis, and can be applied to the actual engineering design.