几乎所有的基础工程都有土的压实问题。许多规范,不管填土的意图怎样,一律要求达到“美国公路协会(AASHO)规定的修正普氏标准密度的95％。”在像轻荷载的仓库、停车场及一般道路的路基和路堤工程中,采用高标准的压实度不但不必要,也是不经济的。对于特殊的承受重荷载的建筑物或对微小的沉陷都很敏感的构筑物,则必须酌情使压实度高于“常用的”95％。 Almost all basic engineering has soil compaction problems. Many of these codes, regardless of their intent, are required to achieve “95% of the modified Platts density as defined by the American Highway Association (AASHO).” In subgrade and embankment works like light-loaded warehouses, parking lots and general roads It is neither unnecessary nor economical to adopt a high standard of compaction. For special structures subject to heavy loads or sensitive to minor subsidence, the compaction level must, as appropriate, be above 95% “common”.