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本文介绍了我国某海区海洋土应力-应变与强度特性,列举了各种试验(三轴剪切试验、单剪流变试验和压缩试验)的典型结果。试验表明:三轴试验显示其本构关系符合邓肯-张双曲线理论,在超压密状态和一定深度下的海洋土均会产生负孔隙水压力,并找出孔压系数 B 与 A_f 的关系;压缩试验与单剪流变试验的应力-应变关系符合幂函数关系;另外,对应力途径、弹性模量等也作了初步分析,为今后深入探索海洋土的性质积累资料。
This paper introduces the stress-strain and strength characteristics of marine soils in a certain sea area of China, and lists the typical results of various tests (triaxial shear tests, single shear rheological tests, and compression tests). The tests show that the triaxial test shows that the constitutive relation is consistent with the Duncan-Chang curve theory. Negative pore water pressure is generated in marine soil under over-densification and depth, and the relationship between pore pressure coefficient B and A_f is found out. The stress-strain relationship of the compression test and the single shear rheological test accords with the power function relationship; in addition, the stress route and the elastic modulus are also preliminary analyzed, and the data are accumulated for further exploration of the nature of the marine soil in the future.