天津滨海新区粘性土物理力学性质指标相关性
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摘要
在岩土工程中,土性参数的选取至关重要。笔者对天津临港地区多个钻孔取样所得土工试验数据的统计规律做了深入分析,并结合传统的回归分析方法客观、详细地研究了滨海新区粘性土物性指标之间及其与力学指标间的相关关系,给出了指标之间的经验关系式,并给出相关系数用于评价相关程度。结果表明,物性指标之间相关性都较好,相关系数可达到0.94以上;物性指标与变形指标之间的相关性分析结果表明,孔隙比、含水率、密度等指标与变形指标的相关性都较好,相比之下含水率与变形指标间的相关性最好,相关系数在0.93以上;物性指标与不同试验方法得到的强度指标之间的相关性分析结果表明,孔隙比、含水率、密度等物性指标与强度指标之间的相关关系较好,相关系数在0.81～0.94之间;文中成果可为该地区资料欠缺的工程提供参考。
It's of vital importance to know properties of clayey soil in geotechnical engineering. Correlation analysis among physical and mechanical properties of clayey soil based on test data from Tianjin Lingang were carried out,and empirical formulas were also successfully put forward. Results show that, correlation coefficients in correlation analysis among physical properties are more than 0. 94, indicating a good relevance. In addition,correlation analysis between physical parameters and formation indexes are also performed,and high correlation coefficients show good relevance between void ratio,water content,density and formation indexes,and relevance between water content and formation index is specially good,with correlation coefficients more than 0.93. Correlation between physical parameters and strength indexes are assessed as well,and there is a good relevance between void ratio,water content,density and strength indexes,with correlation coefficients from 0.81 to 0.94. Empirical formulas put forward in the paper can be reference for parameter selection in case of engineering design lack of materials about subsoil.
It's of vital importance to know properties of clayey soil in geotechnical engineering. Correlation analysis among physical and mechanical properties of clayey soil based on test data from Tianjin Lingang were carried out,and empirical formulas were also successfully put forward. Results show that, correlation coefficients in correlation analysis among physical properties are more than 0. 94, indicating a good relevance. In addition,correlation analysis between physical parameters and formation indexes are also performed,and high correlation coefficients show good relevance between void ratio,water content,density and formation indexes,and relevance between water content and formation index is specially good,with correlation coefficients more than 0.93. Correlation between physical parameters and strength indexes are assessed as well,and there is a good relevance between void ratio,water content,density and strength indexes,with correlation coefficients from 0.81 to 0.94. Empirical formulas put forward in the paper can be reference for parameter selection in case of engineering design lack of materials about subsoil.
引文
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[15]冯望,李顺群,张彦.不同密实度土的微结构与其土水特性间的关系[J].辽宁工程技术大学学报(自然科学版),2013,32(5):611-614.(Feng Wang,Li Shunqun,Zhang Yan.Relationship between microstructure and soil-water characteristic of different density clay[J].Journal of Liaoning Technical University(Natural Science Edition),2013,32(5):611-614.(in Chinese))
[2]Azzouz A S,Krizek R J,Corotis R B.Regression analysis of soil compressibility[J].Soil and Foundations,1976,16(2):19-29.
[3]Kang X,Onyejekwe S,Ge L,et al.Spatial variation and correlation between undrained shear strength and plasticity index[A]//Edited by Han J.and Alzamora D.E.Advances in Geotechnical Engineering[C].Dallas,Texas,United States,2011:2631-2639.
[4]陈继彬,赵其华,彭社琴,等.西南山区沟谷型软土工程特性及沉降规律[J].岩土工程学报,2013,35(增2):945-950.(Chen Jibin,Zhao Qihua,Peng Sheqi,et al.Engineering characteristics and settlement rules of gully soft clay in mountainous areas of Southwest China[J].Chinese Journal of Geotechnical Engineering,2013,35(Supp.2):945-950.(in Chinese))
[5]蒋建平,罗国煜.苏通大桥地基粉质黏土物性指标相关关系试验研究[J].岩土力学,2008,29(6):1669-1674.(Jiang Jianping,Luo Guoyi.Experimental investigations on correlativity between liquidity index and other parameters of silty clay in Su-Tong Bridge subgrade[J].Rock and Soil Mechanics,2008,29(6):1669-1674.(in Chinese))
[6]夏银飞,吴代华,文建华.珠江三角洲软土物理力学指标统计分析[J].公路交通科技,2008,25(1):47-50.(Xia Yinfei,Wu Daihua,Wen Jianhua.Statistic analysis of physical and mechanical indexes of soft soil in Zhujiang Delta[J].Journal of Highway and Transportation Research and Development,2008,25(1):47-50.(in Chinese))
[7]张先伟,孔令伟,郭爱国,等.湛江强结构性黏土的物理力学性质指标及相关性分析[J].工程地质学报,2011,19(4):447-454.(Zhang Xianwei,Kong Lingwei,Guo Aiguo,et al.Physical and mechanical indexes and correlation analysis of clay with noticeable structures in Zhanjiang area[J].Journal of Engineering Geology,2011,19(4):447-454.(in Chinese))
[8]熊桂香,向先超.海滩区淤泥物理力学指标间的相关性研究[J].公路,2011(4):193-196.(Xiong Guixiang,Xiang Xianchao.Correlation analysis of physical and mechanical properties of sludge on the beach area[J].Highway,2011(4):193-196.(in Chinese))
[9]屈若枫,徐光黎,王金峰,等.武汉地区典型软土物理力学指标间的相关性研究[J].岩土工程学报,2014,36(增2):113-119.(Qu Ruofeng,Xu Guangli,Wang Jinfeng,et al.Correlations of physical and mechanical properties of typical soft soils in Wuhan[J].Chinese Journal of Geotechnical Engineering,2014,36(Supp.2):113-119.(in Chinese))
[10]Ziangirov R S,Kashirskii V I.Use of staticpenetration data to evaluate deformation properties of disperse soils[J].Soil Mechanics and Foundation Engineering,2005,42(1):15-21.
[11]简文彬,吴振祥,刘慧明,等.闽东南沿海地区软土静力触探参数相关分析[J].岩土力学,2005,26(5):733-738.(Jian Wenbin,Wu Zhenxiang,Liu Huiming,et al.Correlation analysis of static sounding parameter of soft soil along coastal area of southeast Fujian Province[J].Rock and Soil Mechanics,2005,26(5):733-738.(in Chinese))
[12]杨溢军,童立元,朱宁,等.基于SCPTU测试确定软土压缩模量方法研究[J].地下空间与工程学报,2014,10(增1):1606-1611.(Yang Yijun,Tong Liyuan,Zhu Ning,et al.Evaluation of maximum shear modulus of soft clay from seismic[J].Chinese Journal of Underground Space and Engineering,2014,10(Supp.1):1606-1611.(in Chinese))
[13]马海鹏,陈祖煜,于沭.上海地区土体抗剪强度与静力触探比贯入阻力相关关系研究[J].岩土力学,2014,35(2):536-542.(Ma Haipeng,Chen Zuyu,Yu Mu.Correlations of soil shear strength with specific penetration resistance of CPT in Shanghai area[J].Rock and Soil Mechanics,2014,35(2):536-542.(in Chinese))
[14]杜冬菊,杨爱武,赵建军,等.天津滨海软土[M].北京:科学出版社,2012.(Du Dongju,Yang Aiwu,Zhao Jianju,et al.Costal soft soil in Tianjin[M].Beijing:Science Press,2012.(in Chinese))
[15]冯望,李顺群,张彦.不同密实度土的微结构与其土水特性间的关系[J].辽宁工程技术大学学报(自然科学版),2013,32(5):611-614.(Feng Wang,Li Shunqun,Zhang Yan.Relationship between microstructure and soil-water characteristic of different density clay[J].Journal of Liaoning Technical University(Natural Science Edition),2013,32(5):611-614.(in Chinese))