City as high human settlement of density, the conflict between the human activity and the ecological environment was particularly outstanding.
城市作为高密度的人类聚居地，人类活动与生态环境的矛盾尤为突出。
As a sort of nicer natural building material, it has good compactibility, high permeability, great filling density, high shear strength, less settlement and deformation, and high bearing capacity etc.
其具有压实性能好、透水性强、填筑密度大、抗剪强度高、沉陷变形小、承载力高等工程特性，是一种性能良好的天然建筑材料。
The final settlement of low density roadbed might be twice of that of high density roadbed.
压实度不足时，路基的工后沉降量可能成倍增加。
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