碾压或夯实的遍数和顺序必须正确，以保证土方密实度符合要求。
Times and sequence of roll or ram compaction must be correct to ensure that earth compaction degree meets the requirement.
提出一个强夯中土体被夯实的全过程模型，讨论了两个极限孔隙比问题。
In this paper a model for the whole process of soil compacted by dynamic compaction is proposed and the problems of two ultimate void ratios are discussed.
一般来说，城堡是巨大的建筑物，需要打下夯实的地基和使用如石头般坚固的材料。
Castles are usually enormous structures requiring strong foundations and the use of heavy construction materials such as stone.
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