There are various saliferous soils in circum-Bohai area.In road construction along the sea,the setting of subgrades is induced mainly by dissolution of salt in soils.

• 环渤海地区广泛分布各种类型的盐渍土，在沿海道路施工中，土中盐类的溶解是造成地基沉陷的主要原因。