Study on Compaction Characteristics of Layered Hydraulic Compaction Filling for Earth-Rockfill Dam
In order to study the compaction performance of earth-rockfill dam reinforced by the hydraulic compaction method,the field test of layered hydraulic compaction was carried out to study the compaction characteristics of layered hydraulic compaction based on the momentum conservation law,and the optimization technological parameters were put forward.The results show that the dynamic stress of hydraulic compaction soil is distributed according to the additional stress of foundation under circular uniform load along the depth.The soil dynamic stress at different depths increases with the increase of tamping times until the soil becomes compact and tends to be stable.The single settlement of the lay-ered hydraulic compaction gradually decreases with the increase of the tamping times,and the cumulative settlement grad-ually increases with the increase of the tamping times and finally reaches a stable value.The main reinforcement zone of the layered hydraulic compaction is ellipsoidal,and increasing the click-compaction energy can increase the depth of the main reinforcement zone and thus improve the effective compaction depth of the earth-rock dam.The results show that the optimal compaction times of 18 kJ,27 kJ and 36 kJ are 6,6 and 9 when the initial dry density of the soil is 1.79 g/cm3,and the reinforcement depths of the earth-rockfill dams are 1.9 m,2.1 m and 2.3 m,respectively.The research results can provide reference for engineering practice.
earth-rockfill damlayered hydraulic compactioncompaction characteristicshydraulic compaction test
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