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本文第一部分提出了带仰拱马蹄形襯砌的计算方法及荷载与结构均对称的曲墙路堑式明峒结构的计算方法。其中从温氏弹性地基梁理论出发,还提出了台階形弹性地基梁的计算公式与系数;考虑了仰拱与边墙基础刚性联结和铰结的两种情况以及仰拱上均布荷重对上部拱圈受力条件的影响。第二部分为明峒的光弹性试验应力分析,利用作者设计的有机玻璃加力盒和砂子作为加力介质以及C.R.39膠模型在光弹试验台上进行试验并得出模型的应力状态。第三部分为石膏模型试验,利用1/50石膏模型及加压木箱和砂子作为加压介质,並用电阻应变仪测量模型中之应变,经换算而得应力。第四部分为计算结果与实验结果在定性方面的比较。比较结果表明,计算方法与试验所得结果在定性上极其近似。本文反映了作者及其协助者从1959年以来在本项研究中所取得的初步成果。
In the first part of the paper, the calculation method of horseshoe-shaped lining with inverted arch and the calculation method of the curved wall-like structure with symmetrical load and structure are proposed. Based on the Wen’s elastic foundation beam theory, the calculation formulas and coefficients of the stepped elastic foundation beam are also proposed. Considering both the rigid connection and the hinge joint of the inverted arch and the side wall foundation, Arch ring stress conditions. The second part is the analysis of the photoelastic stress of the light ray, using the plexiglass force box and the sand as the force applying medium and the C.R.39 glue model on the photoelastic test bed to test the stress state of the model. The third part is the gypsum model test. The 1/50 gypsum model, pressurized wooden box and sand are used as pressurizing medium. The strain in the model is measured by resistance strain gauge, and the stress is obtained by conversion. The fourth part is the qualitative comparison between the calculated result and the experimental result. The comparison results show that the calculation results are in good agreement with the experimental results qualitatively. This article reflects the initial results the authors and their facilitators have made in this study since 1959.