砂桩
Sand
sand piles
sand column
pile drain
foundation reinforcement
sand compaction pile
sand pile
granulated substance pile
振冲挤密砂桩
vibroflotation sand compaction pile
砂桩砂被堤
dike of sand pile and sand quilt
振动挤密砂桩
vibro-squeezing sand pile
水上挤密砂桩
Sand compaction pile on the water