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在大量试验研究及工程事故分析基础上，本文着重探讨了黄土湿陷特性研究与工程应用中的九大问题：即湿陷变形的三大主要特征；压缩与湿陷的转化；超湿陷黄土的滞后湿陷；微量浸水下的湿陷；增湿剪切破环和扩底墩的承载力及施工质量问题．
Based on a large number of experimental studies and engineering accident analysis, this paper focuses on nine major issues in the study of collapsibility characteristics and engineering applications of loess: the three main features of collapse deformation; transformation of compression and collapsibility; The lagging wet collapse; the wet collapse of the micro-dip underwater; the load-bearing capacity and construction quality problems of the wet shearing breaking ring and the expanding bottom pier.