The paper introduces uneven load in the arch-back to calculate the internal force in the linking of an interval tunnel for a metro line by theoretical formula and elastic uniform rigidity ring model.

采用拱背非均布荷载作用模式，利用理论计算公式结合弹性匀质圆环法对某城市地铁区间隧道衬砌管片进行内力计算。

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He was the first person to go over backwards with a back arch.

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Instinctively, he kicked across it with the outside of his right foot to arch it over a back-pedalling Shay Given into the top corner.

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