振冲砂桩加固技术在全禄水库施工中的应用

Application of sand vibroflotation piles for strengthening of dam in Quanlu Reservoir

振冲砂桩加固技术是较理想的土石坝加固措施。以广东中山市全禄水库施工为例,分析振冲砂桩在水库大坝施工中的运用及对施工过程进行质量控制和质量检验情况。实践运用说明振冲砂桩不仅可以提高坝基土的密实度、增强坝基复合地基承载力,而且可以在砂桩内形成地下水通道、提高坝基抗"液化"性能,为水库长期安全运行提供基础保障。

Sand vibroflotation piles can be used for strengthening of earth and rockfill dam. Taking Quanlu Reservoir in Zhongshan of Guangdong Province as an example, performance evaluation of sand vibroflotation piles in terms of quality control and inspection during the process of reservoir construction were carried out. It is demonstrated that sand vibroflotation piles can ensure safe and long-term operation of the reservoir, as it not only increases the density of dam foundation soil and bearing capacity of composite foundation, but also has an ＂anti-liquefaction＂ function by forming underground passage within sand pile.