Abstract
Rockfill dam design and construction have progressed on applying local materials without extensive processing and excessive excavation of conventional unusable material. Local quarries exploitation very often result in huge overburden and weathered rock excavation for main dam zones purposes. Weathering soft or weak rock materials (with fines excess) placed at center (T) and 3C downstream areas have been used in the highest CFRDs (concrete face rockfill dams) and at upstream areas in earth core rockfill dams, ECRD, mainly. Safety conditions were guaranteed, so far, even high dams located in seismic hazard areas. Future high soft rockfill dams must concerning to follow a tight specification compaction control, thickness layers maximum at 100 cm, and vibratory roller of at least 12 tons. The rockfill dam zoning design should accommodate overburden soft (weak) rock (“dirty rockfill”) material, focus on to minimize stockpiling and costs. Wetting facilities should not be necessary in these cases, during compaction activities.
Published Version
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