摻水泥模擬原狀軟土動(dòng)力特性的可行性試驗(yàn)研究*
陳穎平1,黃博2
- 摘 要
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（1 福建江夏學(xué)院工程學(xué)院，福州 350108；2 浙江大學(xué)建筑工程學(xué)院，杭州 310058）［摘要］對(duì)浙江某地軟黏土的原狀土樣、重塑土樣以及摻不同含量水泥的水泥土樣進(jìn)行循環(huán)三軸試驗(yàn)，比較分析三種土樣在動(dòng)應(yīng)變、動(dòng)強(qiáng)度及動(dòng)孔壓比等動(dòng)力特性方面的異同。結(jié)果表明，當(dāng)水泥摻量達(dá)到3%時(shí)，水泥土樣的動(dòng)應(yīng)變和動(dòng)強(qiáng)度曲線與原狀土樣非常接近，可以通過摻適量水泥的方法來模擬原狀土的動(dòng)力特性；水泥土樣的動(dòng)強(qiáng)度隨水泥摻量呈非線性變化，可采用雙曲線函數(shù)表達(dá)。［關(guān)鍵詞］土體結(jié)構(gòu); 軟黏土; 水泥; 動(dòng)應(yīng)變; 動(dòng)強(qiáng)度; 動(dòng)孔壓比中圖分類號(hào)：TU435 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：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*國(guó)家自然科學(xué)基金資助項(xiàng)目(10372089)。作者簡(jiǎn)介：陳穎平，博士，講師，Email：cypzju@126.com。參考文獻(xiàn)［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］儲(chǔ)誠(chéng)富，洪振舜，劉松玉，等. 用似水灰比對(duì)水泥土無側(cè)限抗壓強(qiáng)度的預(yù)測(cè)［J］. 巖土力學(xué), 2005, 26(4): 645-649.［5］李建軍，梁仁旺. 水泥土抗壓強(qiáng)度和變形模量試驗(yàn)研究［J］. 巖土力學(xué), 2009, 30(2): 473-477.［6］陳達(dá)，莊寧，廖迎娣，等. 水泥土力學(xué)特性隨齡期發(fā)展規(guī)律試驗(yàn)研究［J］. 水利水運(yùn)工程學(xué)報(bào)，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］陳善民, 王立忠, 李挺，等. 水泥土動(dòng)力特性室內(nèi)試驗(yàn)及復(fù)合地基抗震特性分析［J］. 浙江大學(xué)學(xué)報(bào)：工學(xué)版, 2000, 34(3): 398-403.［9］簡(jiǎn)文彬, 黃春香, 吳維青，等. 水泥土的疲勞試驗(yàn)研究［J］. 巖石力學(xué)與工程學(xué)報(bào), 2004, 23(11): 1949-1953.［10］陳穎平, 黃博, 陳云敏. 循環(huán)荷載作用下結(jié)構(gòu)性軟黏土的變形和強(qiáng)度特性［J］. 巖土工程學(xué)報(bào), 2005, 27(9): 1065-1071.
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