扬州土物理与力学性质指标的相关性分析
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摘要
根据原状扬州各层土体的室内试验数据,采用数理统计的方法,研究了该地区土体的物理指标与力学参数间的相关性,并进行线性函数和指数函数拟合。研究结果表明:随着塑性指数的增加,压缩系数和体积压缩系数逐渐增大,内摩擦角和有效内摩擦角逐渐减小;土的黏聚力随着液限与天然含水量之差的增加而增加,随着液性指数的增加而减小,且黏聚力与液性指数间的相关性更好,当含水量超过液限时黏聚力不随上述两个参数的变化而变化;此外,压汞试验结果表明扬州原状土的孔隙结构均为明显的单峰孔径分布,其颗粒间孔隙的累计量随着塑性指数增大而增加;并且各层土体孔径分布的峰值所对应的孔径随着塑性指数的增大而减小。以上结果可以为扬州地区土体力学参数的估计提供参考。
The correlations of physical index and mechanical parameters,according to experimental data of Yangzhou clays,are investigated in this paper. The statistical results show that there is a positive correlation between the plasticity index and compressibility or bulk compressibility,while there is a negative correlation with internal friction angle or effective internal friction angle. Also,the cohesion decreases with the increase of liquid index,while it increases with the increase of the difference between liquid limit and water content. And the correlation coefficient of cohesion and liquid index is higher. However,if the water content is higher than the liquid limit,the cohesion is independent of the liquidity index or the difference value. In addition,the samples of Yangzhou clays exhibit obviously unimodal pore-size distribution( PSD),obtained from the mercury intrusion porosimetry tests on undisturbed clays. The volume of the inter-particle pores increases,while pore diameter corresponding to the peak of PSD decreases with the increase of the plasticity index. The above results provide a simple method for estimating the mechanical parameters of clay in Yangzhou area.
The correlations of physical index and mechanical parameters,according to experimental data of Yangzhou clays,are investigated in this paper. The statistical results show that there is a positive correlation between the plasticity index and compressibility or bulk compressibility,while there is a negative correlation with internal friction angle or effective internal friction angle. Also,the cohesion decreases with the increase of liquid index,while it increases with the increase of the difference between liquid limit and water content. And the correlation coefficient of cohesion and liquid index is higher. However,if the water content is higher than the liquid limit,the cohesion is independent of the liquidity index or the difference value. In addition,the samples of Yangzhou clays exhibit obviously unimodal pore-size distribution( PSD),obtained from the mercury intrusion porosimetry tests on undisturbed clays. The volume of the inter-particle pores increases,while pore diameter corresponding to the peak of PSD decreases with the increase of the plasticity index. The above results provide a simple method for estimating the mechanical parameters of clay in Yangzhou area.
引文
Bai B,Zhou J,Zhang G.2001.Effect of plasticity index of saturated sof clay on its deformation parameters[J].Journal of Hydraulic Engineering,(11):51-55.
He P,Wang W D,Xu Z H.2018.Empirical correlations of compression index and swelling index for Shanghai clay[J].Rock and Soi Mechanics,39(10):1-10.
Hou X L,Tan X H,Liu Z Y,et al.2017.Compressive indices of cohesive soil and relation to degree of saturation[J].Journal of Engineering Geology,25(5):1336-1343.
Hu S H,Wang X M.1997.The relationship between angle of internal friction and plastic index of clay soil in Shanghai[J].Dam Observation and Geotechnical Tests,21(2):39-41.
Huang L S.2005.Cohesion of saturated silt and cohesive soil[J].Mineral Resources and Geology,19(2):201-203.
Huang S M,Gao D Z.2005.Foundation and underground engineering in soft ground[M].Beijing:China Architecture&Building Press:25-26.
Kodikara J,Barbour S,Fredlund D.1999.Changes in clay structure and behaviour due to wetting and drying[C]//Proc.8 th Australia-New Zealand Conference on Geomechanics,Hobart,1:179-186.
Kong D J,Sun W H.2000.Statistics analysis on friction angle of shear strength for clay[J].Port&Waterway Engineering,(2):10-13.
Li C C,Xu S G,Wu J,et al.2014.The analysis of the correlativity between the internal frictional angle and physical parameter of the soft soil in the south city,Kunming,Yunnan Province[J].Science Technology and Engineering,14(3):243-245.
Li G X.2004.Advanced soil Mechanics[M].Beijing:Tsinghua University Press.
Liu Y.2016.Investigation on the swelling properties and microstructure mechanism of compacted Gaomiaozi bentonite[J].Journal of Engineering Geology,24(3):451-458.
Meng J,Gao Y B,Yuan J Y.2008.Study on the effective angle of internal friction of remolded clay in Shanghai[J].Journal of Engineering Geology,16(S1):677-680.
Nakase A,Kamei T,Kusakabe O.1988.Constitutive parameters estimated by plasticity index[J].Journal of Geotechnical Engineering,ASCE,114(7):844-858.
Schofield A N,Wroth C P.1968.Critical state soil mechanics[M].London:Mc Graw Hill Book Co.
Sridharan A,Nagaraj H B.2000.Compressibility behavior of remolded,fine-grained soils and correlation with index properties[J].Canadian Geotechnical Journal,37:712-722.
Sun Y L,Yu H M.2015.Correlation analysis of the compressibility and physical indices of soils in Beijing[J].China Earthquake Engineering Journal,37(S1):26-29.
Terzaghi K,Peck R B,Mesri G.1996.Soil mechanics in engineering practice[M].Third edition.New York:John Wiley&Sons.Inc.
The Professional Standards Compilation Group of People's Republic of China.2002.Code for design of building foundation(GB 50007-2002)[S].Beijing:China Architecture&Building Press.
The Professional Standards Compilation Group of People's Republic of China.1999.Standard for soil test method(GB 50007-2002)[S].Beijing:China Architecture&Building Press.
Wu C J,Ye G L,Wang J H.2014.Relationship between compression index and natural water content of Shanghai clay[J].Rock and Soil Mechanics,35(11):3184-3190.
Zhao J,Jiang L W,Luo Q,et al.2018.Correlative analysis between variation level of soil strength parameters and influencing factors[J].Journal of Engineering Geology,26(3):592-601.
Zhu L M,Weng X D.1964.Correlation between physical and mechanical properties of clay in Shanghai area[C]//China Civil Engineering Society,et al.Proceedings of the First National Conference on Soi Mechanics and Foundation Engineering.Beijing:China Industry Press.
白冰,周健,章光.2001.饱和软黏土的塑性指数对其压缩变形参数的影响[J].水利学报,(11):51-55.
何平,王卫东,徐中华.2018.上海黏土压缩指数和回弹指数经验关系[J].岩土力学,39(10):1-10.
侯晓亮,谭晓慧,刘泽勇,等.2017.黏性土压缩指标及其与饱和度的关系[J].工程地质学报,25(5):1336-1343.
胡世华,王侠民.1997.上海地区黏性土有效内摩擦角与塑性指数关系[J].大坝观测与土工测试,21(2):39-41.
黄丽珊.2005.浅析饱水淤泥和黏性土的黏聚力[J].矿产与地质,19(2):201-203.
黄绍铭,高大钊.2005.软土地基与地下工程[M].北京:建筑工业出版社:25-26.
孔德金,孙万禾.2000.黏土抗剪强度内摩擦角统计分析[J].水运工程,(2):10-13.
李晨晨,徐世光,吴静,等.2014.昆明市南市区软土内摩擦角与各物理指标之间的相关关系分析[J].科学技术与工程,14(3):243-245.
李广信.2004.高等土力学[M].北京:清华大学出版社.
刘毅.2016.高庙子膨润土水化膨胀特性及其微观机理研究[J].工程地质学报,24(3):451-458.
孟静,高彦斌,袁聚云.2008.上海地区重塑黏性土有效内摩擦角试验研究[J].工程地质学报,16(S1):677-680.
孙毅力,于洪民.2015.北京区域土的压缩性与物理指标相关性分析[J].地震工程学报,37(S1):26-29.
武朝军,叶冠林,王建华.2014.上海浅部土层压缩指数与天然含水率的关系[J].岩土力学,35(11):3184-3190.
赵晶,蒋良潍,罗强,等.2018.土体强度参数变异水平及影响因素关联分析[J].工程地质学报,26(3):592-601.
中华人民共和国行业标准编写组.1999.土工试验方法标准(1999.GB/T 50123-1999)[S].北京:中国建筑工业出版社.
中华人民共和国行业标准编写组.2002.建筑地基基础设计规范(GB50007-2002)[S].北京:中国建筑工业出版社.
朱良模,翁显达.1964.上海地区黏性土的物理力学性质指标间相关关系的探讨[C]//中国土木工程学会等.第一届土力学与基础工程学术会议论文选集.北京:中国工业出版社:41-47.
He P,Wang W D,Xu Z H.2018.Empirical correlations of compression index and swelling index for Shanghai clay[J].Rock and Soi Mechanics,39(10):1-10.
Hou X L,Tan X H,Liu Z Y,et al.2017.Compressive indices of cohesive soil and relation to degree of saturation[J].Journal of Engineering Geology,25(5):1336-1343.
Hu S H,Wang X M.1997.The relationship between angle of internal friction and plastic index of clay soil in Shanghai[J].Dam Observation and Geotechnical Tests,21(2):39-41.
Huang L S.2005.Cohesion of saturated silt and cohesive soil[J].Mineral Resources and Geology,19(2):201-203.
Huang S M,Gao D Z.2005.Foundation and underground engineering in soft ground[M].Beijing:China Architecture&Building Press:25-26.
Kodikara J,Barbour S,Fredlund D.1999.Changes in clay structure and behaviour due to wetting and drying[C]//Proc.8 th Australia-New Zealand Conference on Geomechanics,Hobart,1:179-186.
Kong D J,Sun W H.2000.Statistics analysis on friction angle of shear strength for clay[J].Port&Waterway Engineering,(2):10-13.
Li C C,Xu S G,Wu J,et al.2014.The analysis of the correlativity between the internal frictional angle and physical parameter of the soft soil in the south city,Kunming,Yunnan Province[J].Science Technology and Engineering,14(3):243-245.
Li G X.2004.Advanced soil Mechanics[M].Beijing:Tsinghua University Press.
Liu Y.2016.Investigation on the swelling properties and microstructure mechanism of compacted Gaomiaozi bentonite[J].Journal of Engineering Geology,24(3):451-458.
Meng J,Gao Y B,Yuan J Y.2008.Study on the effective angle of internal friction of remolded clay in Shanghai[J].Journal of Engineering Geology,16(S1):677-680.
Nakase A,Kamei T,Kusakabe O.1988.Constitutive parameters estimated by plasticity index[J].Journal of Geotechnical Engineering,ASCE,114(7):844-858.
Schofield A N,Wroth C P.1968.Critical state soil mechanics[M].London:Mc Graw Hill Book Co.
Sridharan A,Nagaraj H B.2000.Compressibility behavior of remolded,fine-grained soils and correlation with index properties[J].Canadian Geotechnical Journal,37:712-722.
Sun Y L,Yu H M.2015.Correlation analysis of the compressibility and physical indices of soils in Beijing[J].China Earthquake Engineering Journal,37(S1):26-29.
Terzaghi K,Peck R B,Mesri G.1996.Soil mechanics in engineering practice[M].Third edition.New York:John Wiley&Sons.Inc.
The Professional Standards Compilation Group of People's Republic of China.2002.Code for design of building foundation(GB 50007-2002)[S].Beijing:China Architecture&Building Press.
The Professional Standards Compilation Group of People's Republic of China.1999.Standard for soil test method(GB 50007-2002)[S].Beijing:China Architecture&Building Press.
Wu C J,Ye G L,Wang J H.2014.Relationship between compression index and natural water content of Shanghai clay[J].Rock and Soil Mechanics,35(11):3184-3190.
Zhao J,Jiang L W,Luo Q,et al.2018.Correlative analysis between variation level of soil strength parameters and influencing factors[J].Journal of Engineering Geology,26(3):592-601.
Zhu L M,Weng X D.1964.Correlation between physical and mechanical properties of clay in Shanghai area[C]//China Civil Engineering Society,et al.Proceedings of the First National Conference on Soi Mechanics and Foundation Engineering.Beijing:China Industry Press.
白冰,周健,章光.2001.饱和软黏土的塑性指数对其压缩变形参数的影响[J].水利学报,(11):51-55.
何平,王卫东,徐中华.2018.上海黏土压缩指数和回弹指数经验关系[J].岩土力学,39(10):1-10.
侯晓亮,谭晓慧,刘泽勇,等.2017.黏性土压缩指标及其与饱和度的关系[J].工程地质学报,25(5):1336-1343.
胡世华,王侠民.1997.上海地区黏性土有效内摩擦角与塑性指数关系[J].大坝观测与土工测试,21(2):39-41.
黄丽珊.2005.浅析饱水淤泥和黏性土的黏聚力[J].矿产与地质,19(2):201-203.
黄绍铭,高大钊.2005.软土地基与地下工程[M].北京:建筑工业出版社:25-26.
孔德金,孙万禾.2000.黏土抗剪强度内摩擦角统计分析[J].水运工程,(2):10-13.
李晨晨,徐世光,吴静,等.2014.昆明市南市区软土内摩擦角与各物理指标之间的相关关系分析[J].科学技术与工程,14(3):243-245.
李广信.2004.高等土力学[M].北京:清华大学出版社.
刘毅.2016.高庙子膨润土水化膨胀特性及其微观机理研究[J].工程地质学报,24(3):451-458.
孟静,高彦斌,袁聚云.2008.上海地区重塑黏性土有效内摩擦角试验研究[J].工程地质学报,16(S1):677-680.
孙毅力,于洪民.2015.北京区域土的压缩性与物理指标相关性分析[J].地震工程学报,37(S1):26-29.
武朝军,叶冠林,王建华.2014.上海浅部土层压缩指数与天然含水率的关系[J].岩土力学,35(11):3184-3190.
赵晶,蒋良潍,罗强,等.2018.土体强度参数变异水平及影响因素关联分析[J].工程地质学报,26(3):592-601.
中华人民共和国行业标准编写组.1999.土工试验方法标准(1999.GB/T 50123-1999)[S].北京:中国建筑工业出版社.
中华人民共和国行业标准编写组.2002.建筑地基基础设计规范(GB50007-2002)[S].北京:中国建筑工业出版社.
朱良模,翁显达.1964.上海地区黏性土的物理力学性质指标间相关关系的探讨[C]//中国土木工程学会等.第一届土力学与基础工程学术会议论文选集.北京:中国工业出版社:41-47.