The underground passage beneath the Changchun Railway Station, goes mainly through the plastic clay stratum. The construction is full of difficulty.
长春站南北广场地下通道位于软土地层并穿越铁路站场，施工难度大。
In the stratum taking clay as main cement, water dissolves the cement in the stratum after beginning to produce water, and which reduced the consolidation intensity of stratum.
而在以粘土为主要胶结物的地层中，当开始产水后，水溶解地层中的胶结物，降低了地层固结强度。
No matter what the salinity of stratum-water is high or low, the additional conductivity influence of clay may make pay have low resistance.
无论地层水矿化度高或低，粘土附加导电均可能造成油气层低阻。
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