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。
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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