Discussion on the Construction of Foundation Mixing Pile in the Flood Diversion Sluice Chamber
Taking the Dongguan diversion sluice of Datong Lake as an example,based on the analysis of the basic geological conditions of the gate chamber,the original high-pressure swing jet grouting anti-seepage wall was changed to a cement soil mixing pile scheme Combined with the field pile test,the slurry water-cement ratio and density,the slurry dosage,the sinking and lifting speed,the slurry flow rate,and other parameter values were determined;drilling rig optimization and drill bit optimization improvement are carried out;Based on this,the key points of construction technology is analyzed.The results show that the five-axis cement soil mixing pile has the technical advantages,such as fast pile formation speed,large primary construction area,high working efficiency,small possibility of cold joint,sufficient mixing,good pile integrity and uniformity,and can be popularized and applied in the same type of water conservancy projects.
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