名词
中文翻译：碎石拱顶
同义词：
['rubbish vault', 'rubble vault', 'rubble dam', 'rubble slab']
例句：
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1. The construction crew was working on the rubble vault to reinforce it.
建筑工人们在加固碎石拱顶。
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2. The rubble vault was a crucial part of the foundation for the new building.
碎石拱顶是新建筑物地基的关键部分。
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3. After the earthquake, the rubble vault was cleared away and the site was restored.
地震后，清理了碎石拱顶，恢复了现场。