考虑主应力轴旋转效应的交通荷载下饱和软黏土变形特性试验研究

doi:10.13722/j.cnki.jrme.2015.1252

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Abstract A series of undrained tests were conducted with hollow cylinder apparatus for undisturbed saturated soft clay under coupled loading path of principal stress magnitude and principal stress rotation induced by traffic loading. The effects of principal stress rotation on pore pressure，deformation and stress-strain relationship were studied by comparing the results of cyclic triaxial tests and traffic loading path tests. The effects of the generalized shear stress level on the stiffness of stress-strain and non-coaxiality were also investigated. Test results show that compared to cyclic triaxial tests，the pore pressure and strain are significantly larger and the stiffness of stress-strain loops experiences a dramatic reduction under principal stress rotation induced by traffic loading. During cyclic coupling loading，two different cyclic responses，i.e.，the shear stress-strain relation and the normal differential stress-strain relation，were observed. The shear stiffness over stress-strain loops exhibited an anisotropic cyclic degradation and the strain increment vector displayed non-coaxility，which varied in different sections of the loop. In addition，in the lower shear stress level tests，the trajectory of strain paths tends to be stable，accompanied by the stiffness hardening and increase of non-coaxiality. In the higher shear stress level tests，the strain path envelopes tend to fail，accompanied by the stiffness degradation and reduction of non-coaxiality.

Key words： soil mechanics principal stress rotation traffic loading cyclic degradation saturated soft clay non-coaxiality

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	DU Zibo1
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	QIAN Jiangu1
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	HUANG Maosong1
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Cite this article:

DU Zibo1,2,QIAN Jiangu1, et al. Experimental study on deformation behavior of saturated soft clay under traffic loading considering effect of principal stress rotation[J]. , 2016, 35(5): 1031-1040.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1252 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/I5/1031

[1] ISHIHARA K. Soil response in cyclic loading induced by earthquakes，traffic and waves[C]// Proceedings of the 7th Asian Regional Conference on Soil Mechanics and Foundation Engineering. [S.l.]：[s.n.]，1983：42–66.
[2] CHAN F W K，BROWN S F. Significance of principal stress rotation in pavements[C]// Proceedings of the 13th International Conference on Soil Mechanics and Foundation Engineering. [S.l.]：[s.n.]，1994：1 823– 1 826.
[3] GUTIERREZ M，ISHIHARA K，TOWHATA I. Model for the deformation of sand during rotation of principal stress directions[J]. Soils and Foundations，1993，33(3)：105–117.
[4] ROSCOE K，BASSETT R，COLE E. Principal axes observed during simple shear of a sand[C]// Proceedings of Geotechnical Conference on Shear Strength Properties of Nature Soils and Rocks. Oslo：Norwegian Geotechnical Society，1967：231–237.
[5] YU H S，YUAN X. The importance of accounting for non-coaxial behavior in modeling soil-structure interaction[C]// Proceedings of the 11th IACMAG. [S.l.]：[s.n.]，2005：709–718.
[6] YANG Z X，LI X S，YANG J. Undrained anisotropy and rotational shear in granular soil[J]. Geotechnique，2007，57(4)：371–384.
[7] BROWN S. Soil mechanics in pavement engineering[J]. Geotechnique，1996，46(3)：383–426.
[8] 王常晶，陈云敏. 移动荷载引起的地基应力状态变化及主应力轴旋转[J]. 岩石力学与工程学报，2007，26(8)：1 698–1 704.(WANG Changjing，CHEN Yunmin. Stress state variation and principal stress axes rotation of ground induced by moving loads[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(8)：1 698–1 704.(in Chinese))
[9] GUTIERREZ M，ISHIHARA K，TOWHATA I. Flow theory for sand during rotation of principal stress direction[J]. Soils and Foundations，1991，31(4)：121–132.
[10] MIURA K，MIURA S，TOKI S. Deformation behavior ofanisotropic sand under principal stress axes rotation[J]. Soils and Foundations，1986，26(1)：36–52.
[11] 蔡燕燕，俞缙，余海岁，等. 考虑主应力轴旋转的砂土变形特性试验研究[J]. 岩石力学与工程学报，2013，32(2)：417–424.(CAI Yanyan，YU Jin，YU Haisui，et al. Experimental study of deformation behavior of sand under rotation of principal stress axes[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(2)：417–424.(in Chinese))
[12] CAI Y，YU H S，WANATOWSKI D，et al. Noncoaxial behavior of sand under various stress paths[J]. Journal of Geotechnical and Geoenvironmental Engineering，2013，139(8)：1 381–1 395.
[13] TONG Z X，ZHANG J M，YU Y L，et al. Drained deformation behavior of anisotropic sands during cyclic rotation of principal stress axes[J]. Journal of Geotechnical and Geoenvironmental Engineering，2010，136(11)：1 509–1 518.
[14] YANG L T. Experimental study of soil anisotropyusing hollow cylinder testing[Ph. D. Thesis][D]. Nottingham：University of Nottingham，2013.
[15] 沈扬，周建，龚晓南，等. 考虑主应力方向变化的原状软黏土应力应变性状试验研究[J]. 岩土力学，2009，30(12)：3 720– 3 726.(SHEN Yang，ZHOU Jian，GONG Xiaonan，et al. Experimental study of stress-strain properties of intact softclay considering the change of principal stress direction[J]. Rock and Soil Mechanics，2009，30(12)：3 720–3 726.(in Chinese))
[16] 严佳佳，周建，管林波，等. 杭州原状软黏土非共轴特性与其影响因素试验研究[J]. 岩土工程学报，2013，35(1)：96–102.(YAN Jiajia，ZHOU Jian，GUAN Linbo，et al. Experimental study on non-coaxiality and influence factors ofintact Hangzhou soft clay[J]. Chinese Journal of Geotechnical Engineering，2013，35(1)：96–102. (in Chinese))
[17] ZHOU J，YAN J J，LIU Z Y，et al. Undrained anisotropy and non-coaxial behavior of clayey soil under principal stress rotation[J]. Journal of Zhejiang University，2014，15(4)：241–254.
[18] WIJEWICKREME D，VAID Y P. Behaviour of loose sand under simultaneous increase in stress ratio and principal stress rotation[J]. Canadian Geotechnical Journal，1993，30(6)：953–964.
[19] 童朝霞. 应力主轴循环旋转条件下砂土的变形规律与本构模型研究[博士学位论文][D]. 北京：清华大学，2008.(TONG Zhaoxia. Research on deformation behavior and constitutive model of sands under cyclic rotation of principal stress axes[Ph. D. Thesis][D]. Beijing：Tsinghua University，2008.(in Chinese))
[20] GRÄBE P J，CLAYTON C R I. Effects of principal stress rotationon permanent deformation in rail track foundations[J]. Journal of Geotechnical and Geoenvironmental Engineering，2009，135(4)：555–565.
[21] XIAO J，JUANG C H，WEI K，et al. Effects of principal stress rotation on the cumulative deformation of normally consolidated soft clay under subway traffic loading[J]. Journal of Geotechnical and Geoenvironmental Engineering，2014，140(4)：80–90.
[22] 钱建固，王永刚，张甲锋，等. 交通动载下饱和软黏土累计变形的不排水循环扭剪试验[J]. 岩土工程学报，2013，35(10)：1 790–1 798. (QIANJiangu，WANG Yonggang，ZHANG Jiafeng，et al. Undrained cyclic torsion shear tests on permanent deformation responses of soft saturated clay to traffic loadings[J]. Chinese Journal of Geotechnical Engineering，2013，35(10)：1 790–1 798.(in Chinese))
[23] NISHIMURA S. Laboratory study on anisotropy of natural London clay[Ph. D. Thesis][D]. London：Imperial College London，2005.
[24] AKAGI H，SAITOH J. Dilatancy characteristics of clayey soil under principal axes rotation[C]// Proceedings of the International Symposium on Prefailure Deformation Characteristics of Geomaterial. Sapppro：Balkema A A，1994：311–314.
[25] HILL R，HUTCHINSON J. Bifurcation phenomena in the plane tension test[J]. Journal of the Mechanics and Physics of Solids，1975，23(4)：239–264.
[26] VARDOULAKIS I. Shear band inclination and shear modulus of sand in biaxial tests[J]. International Journal for Numerical and Analytical Methods in Geomechanics，1980，4(2)：103–119.
[27] DESRUES J，CHAMBON R. Shear band analysis and shear moduli calibration[J]. International Journal of Solids and Structures，2002，39(13)：3 757–3 776.
[28] RUDNICKI J W，RICE J R. Conditions for the localization ofthe deformation in pressure sensitive dilatant materials[J]. Journal of the Mechanics and Physics of Solids，1975，23(6)：371–394.