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滩坑水电站面板堆石坝坝基开挖工程量大,受初期度汛目标面貌限制,工期紧,施工强度高,尤其是趾板后30m范围有约25m厚的淤泥质深覆盖层,其含水量高,易液化,施工难度较大。通过采取分区开挖、降排水、施工道路抛石挤淤等多项措施,确保了坝基开挖按期完工。
The dam foundation of the rockfill dam has a large volume of excavation and is limited by the initial target of flood season. It has tight construction period and high construction intensity. In particular, there is a silty deep overburden about 25m thick within 30m after the toe plate. The water content High, easy liquefaction, construction more difficult. By taking a number of measures such as zoning excavation, water drainage and stone dumping of construction roads, the excavation of the dam foundation was completed on schedule.