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中文摘要：
为了准确地掌握软黏土的蠕变特性,以湖南省竹城公路路基软黏土为研究对象,采用梯级荷载加载方法进行了室内三轴固结不排水蠕变试验,获得该软黏土蠕变试验数据和曲线。然后采用Singh-Mitchell经验蠕变模型描述该软黏土的蠕变特性,但模型计算结果与试验结果误差较大。分析Singh-Mitchell模型与试验结果产生误差的原因,通过对Singh-Mitchell模型的指数函数部分进行改进以及将原幂函数部分改换成双曲线函数,建立修正的Singh-Mitchell蠕变模型,并将新建立模型的计算结果与试验结果进行比较。研究结果表明：所建立的修正的Singh-Mitchell蠕变模型与试验结果一致性远优于原Singh-Mitchell模型,能更好地描述该软黏土的蠕变特性。
英文摘要：
Consolidated undrained triaxial creep tests of Hunan Zhucheng highway subgrade soft clay were done with multi-grade loading method for knowing the characteristic well.A good result of creep test was obtained.Singh-Mitchell creep model was used for describing creep characteristic of soft clay.But the results calculated by Singh-Mitchell creep model had large errors with that from laboratory tests.Modified Singh-Mitchell creep model was found by mending exponential function of Singh-Mitchell creep model and changing its power function into hyperbolic function after analyzing the errors.Compared with the original model results,the modified model results have better accordance with that from the laboratory tests,and are more suitable to reflect the creep characteristics of that soft clay.
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