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本文以天津滨海软土为研究对象,运用室内试验、微观分析等手段,并采用宏微观结合的方法对结构性软土的蠕变特性进行了研究。试验结果表明:天津滨海软土蠕变特性显著,且蠕变有明显的非线性特征;通过对原状土和重塑土的蠕变试验结果曲线对比分析,表明软土的结构对其蠕变特性具有显著影响;原状土体疏松的片架结构、颗粒的边—面接触以及发育的孔隙是土体具有显著蠕变特性的内在原因,蠕变稳定后土体结构密实程度提高,稳定性增强,颗粒聚合,大孔隙减少,小孔隙增多,孔隙逐渐均匀化。
In this paper, the coastal soft soil in Tianjin as the research object, the use of laboratory tests, micro-analysis and other means, and the combination of macro-micro-method of structural soft clay creep characteristics were studied. The test results show that: Tianjin coastal soft soil creep characteristics are significant, and creep obvious nonlinear characteristics; through the original soil and remolded soil creep test results of the comparative analysis showed that the soft soil structure of its creep properties The loose structure of the intact soil, the edge-to-surface contact of particles and the developed pores are the intrinsic causes of the significant creep characteristics of the soil. After the creep stability, the density of the soil structure is increased and the stability is enhanced. Particle polymerization, macropores decreased, small pores increased, the pores gradually uniform.