研究了基于GPS的压实率控制法在碾压质量控制中的应用，利用GPS采集的数据点经过计算得到压实率，然后通过压实率来控制碾压质量。
The compacted rate method is worked out for quality control of earth-rockfill dam and the data for calculating the compacted rate are acquired by GPS.
沉积物的分选和压实作用影响渗透率和孔隙度。
Sediment sorting and compaction influence permeability and porosity.
沉积物分选越差或压实越紧，其孔隙度和渗透率就越低。
The more poorly sorted or the more tightly compacted a sediment is, the lower its porosity and permeability.
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