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عمران::
خاک متورمشونده
Flexible pavements tend to perform better than rigid pavements in moderate to highly expansive soils.
Overexcavation of expansive soils and replacement with nonexpansive or treated soils has been used to mitigate soil heave under a founda- tion or subgrade.
In this method, the expansive soil is excavated to an appropriate depth to minimize heave to an appropriate amount, and then appropriately treated and compacted fill is placed to bring the soil up to grade.
If nonexpansive fill is not available, the swell characteristics of the on-site expansive soils can be altered by moisture-conditioning and compaction control.
Generally, the expansive soil layer extends to a depth that is too great to economically allow complete removal and replacement.
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