For a stone arch bridge with a given arch centre line and a given loading condition, there exists a minimum thickness limit for the arch ring.

给定拱轴的石拱桥，对应于每个荷载工况，拱圈有一个最小极限厚度。如果拱圈厚度等于或小于这个极限，石拱将出现三个以上的铰而破坏。

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For a stone arch bridge with a given arch centre line and a given loading condition, there exists a minimum thickness limit for the arch ring.

给定拱轴的石拱桥，对应于每个荷载工况，拱圈有一个最小极限厚度。如果拱圈厚度等于或小于这个极限，石拱将出现三个以上的铰而破坏。

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