掺水泥模拟原状软土动力特性的可行性试验研究*
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（1 福建江夏学院工程学院，福州 350108；2 浙江大学建筑工程学院，杭州 310058）［摘要］对浙江某地软黏土的原状土样、重塑土样以及掺不同含量水泥的水泥土样进行循环三轴试验，比较分析三种土样在动应变、动强度及动孔压比等动力特性方面的异同。结果表明，当水泥掺量达到3%时，水泥土样的动应变和动强度曲线与原状土样非常接近，可以通过掺适量水泥的方法来模拟原状土的动力特性；水泥土样的动强度随水泥掺量呈非线性变化，可采用双曲线函数表达。［关键词］土体结构; 软黏土; 水泥; 动应变; 动强度; 动孔压比中图分类号：TU435 文献标识码：A 文章编号：1002-848X(2015)01-0087-04Feasibility experimental study on simulating dynamic characteristics of natural soft clay by filling cementChen Yingping1, Huang Bo2(1 Engineering College, Fujian Jiangxia University, Fuzhou 350108, China; 2 College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China)Abstract: The cyclic triaxial tests on natural clay, remolded clay and cemented clay with different content of cement of a kind of soft clay in Zhejiang province were conducted to compare and analyze the characteristics of these three samples in dynamic strain, dynamic strength and dynamic pore pressure ratio. The result shows that the dynamic strain curve and dynamic strength curve of cemented clay with cement content 3% are close to that of natural ones, which indicates that dynamic characteristics of natural soft clay can be simulated by filling cement. The relationship between dynamic strength of cemented clay and the cement content is nonlinear and can be fitted by hyperbolic function.Keywords: clay structure; soft clay; cement; dynamic strain; dynamic strength; dynamic pore pressure ratio*国家自然科学基金资助项目(10372089)。作者简介：陈颖平，博士，讲师，Email：cypzju@126.com。参考文献［1］OGAWA S, SHIBAYAMA T, YAMAGUCHI H. Dynamic strength of saturated cohesive soil［C］//The 9th International Conference on Soil Mechanics and Foundation Engineering. Tokyo, 1977.［2］TSUTOMU K , KUNIO S. The influence of disturbance due to sample preparation on the undrained strength of saturated cohesive soil［J］. Soils and Foundations, 1982, 22(4):109-119.［3］FATEN , SERGE , PIERRE L R, et al. Behaviour of the stiff and sensitive Saint-JeanVianney clay in intact, destructured, and remoulded conditions［J］. Canadian Geotechnical Journal, 2011, 39(5):1075-1087.［4］储诚富，洪振舜，刘松玉，等. 用似水灰比对水泥土无侧限抗压强度的预测［J］. 岩土力学, 2005, 26(4): 645-649.［5］李建军，梁仁旺. 水泥土抗压强度和变形模量试验研究［J］. 岩土力学, 2009, 30(2): 473-477.［6］陈达，庄宁，廖迎娣，等. 水泥土力学特性随龄期发展规律试验研究［J］. 水利水运工程学报，2012，131(1): 26-29.［7］FAHOUM K, AGGOUR M S，AMINI F. Dynamic properties of cohesive soils treated with lime［J］. Journal of Geotechnical and Geoenviromental Engineering, ASCE, 1996, 122(5): 382-389.［8］陈善民, 王立忠, 李挺，等. 水泥土动力特性室内试验及复合地基抗震特性分析［J］. 浙江大学学报：工学版, 2000, 34(3): 398-403.［9］简文彬, 黄春香, 吴维青，等. 水泥土的疲劳试验研究［J］. 岩石力学与工程学报, 2004, 23(11): 1949-1953.［10］陈颖平, 黄博, 陈云敏. 循环荷载作用下结构性软黏土的变形和强度特性［J］. 岩土工程学报, 2005, 27(9): 1065-1071.
