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厦门港湾除深槽主航道水动力较强地段、基岩出露地段、礁石区及基岩岸段外，表层普遍覆盖了一层对工程不利的厚约1～20m、高含水量、高压缩性、中-高灵敏度的第四纪滨海沉积相的软土。本文探讨了研究区软土的成因和一般工程特征，应用线性回归分析得出天然含水量W对液性指数I、孔隙比e及压缩模量Es的回归方程。并分析了该软土的震动触变性和对桩可能产生负摩阻力问题及防治。
In addition to the strong hydrodynamics of the deep channel main channel, the outcrop of base rock, the rock area and the bedrock of Xiamen Bay, the surface of the harbor generally covers a layer of unfavorable thickness of 1 ~ 20m, high water content and high compressibility , Medium-high sensitivity Quaternary sediment facies soft soil. In this paper, the causes and general engineering characteristics of soft soil in the study area are discussed. The regression equation of natural water content W to liquidity index I, void ratio e and compressive modulus Es is obtained by linear regression analysis. The thixotropy of the soft soil and the negative friction resistance to the pile are analyzed.