In this technique, the original sand, soil and humus are replaced by clean sand;then water is poured into the base pit enabling sand rearranged and compacted by means of the water down-seepage force.

• 水坠砂工艺就是采用洁净的砂土替换原有砂土及腐质土，然后往基坑内灌水，使砂土借助水下渗的作用力重新排列组合，以达到密实的效果。