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顺德市２２０ｋＶ变电站地基不均匀沉降的原因是群桩桩尖平面以下淤泥层的承载力不足，采用将各桩台补桩０～３根，桩长３５ｍ（原桩长２０５ｍ），将上部荷载传递至更深淤泥层的办法补强，有效地控制了原地基的不均匀沉降
The reason for the uneven foundation settlement of the 220kV substation in Shunde is that the bearing capacity of the silt layer below the tip of the pile group is insufficient. The piles are piled with 0 to 3 piles and the pile length is 35m (the original pile length is 205m). The method of transferring the load to deeper silt layer reinforces and effectively controls the uneven settlement of the original foundation.