We are constructing a pervious pavement for a parking lot which is very closed to water. Our contractor has graded and started compacting the soil to try to get 95% compaction. However, it turned out that the groundwater is very close to the grade and the contractor can only get 77% compaction 8” below. What are some solutions? Is this issue simply a matter of groundwater? We do have a soil curve for the soil. And how deep do we have to worry about the sub grade compaction? If we are getting 77% compaction at 8”, just imagine what it is at lower depth.
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