主应力轴旋转条件下软黏土的非共轴研究

doi:10.13722/j.cnki.jrme.2014.0964

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Abstract A series of undrained tests were carried out on Hangzhou soft clay with a hollow cylinder apparatu，and the elastic parameters were obtained at first，on the basis of which the non-coaxial development behavior of soft clay was studied as well as the influence of intermediate principal stress parameter，elastic strains，intermediate principal stress parameter，deviatoric stress and induced anisotropy on non-coaxiality. The results show that the non-coaxiality of soft clay is similar to that of sand，but they are far from identical. Regardless of intact soft clay or remodeled soft clay，the non-coaxial angle fluctuates with the increase of angle of principal stress，of which the cycle period is 90°. The non-coaxial angle basically decreases with the increase of intermediate principal stress parameter. The elastic strains have a significant effect on the angle of non-coaxiality at the beginning of loading，and it will overestimate the non-coaxiality of soft clay if not considering the elastic strains. The deviatoric stress has certain effect on the angle of non-coaxial as well as its development trend，and the larger the deviatoric stress is，the smaller the angle of non-coaxiality is. As to the test of remodeled soft clay，it shows that the non-coaxiality is not only entirely determined by the inherent anisotropy，the induced anisotropy also has a great impact.

Key words： soft clay non-coaxiality elastic parameter principal stress rotation

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2014.0964 OR http://www.rockmech.org/EN/Y2015/V34/I06/21

[3]	YANG Y M，YU H S. Application of a non-coaxial of model in shallow foundation[J]. Geomechanics and Geoengineering，2006，1(2)：139-150. " target="_blank">
[4]	ROSCOE K H，BASSET R H，COLE E R L. Principal axes observed during simple shear of a sand[C]//4th European Conference on Soil Mechanics and Foundation Engineering. Oslo. 1967：231-237. " target="_blank">
[6]	SYMES M J，GENS A，HIGHT D W. Drained principal stress rotation in saturated sand[J]. Geotechnique，1988，38(4)：59-81. " target="_blank">
[7]	SYMES M J，GENS A，HIGHT D.W. Undrained anisotropy and principal stress rotation in saturated sand[J]. Geotechnique，1984，34(1)：11-27. " target="_blank">
[11]	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 of intact Hangzhou soft clay[J]. Chinese Journal of Geotechnical Engineering，2013，35(1)：96-102. (in Chinese)).
[14]	BLANC M.，BENEDETTO D. TIOUAJNI S. Deformation characteristics of dry Hostun sand with principal stress axes rotation[J]. Soils and Foundations，2011，51(4)：749-760.
[8]	GUTIERREZ M，ISHIHARA，K. Non-coaxiality and Energy Dissipation in Granular Material[J]. Soils and Foundations. 2000，40(2)：49-59. " target="_blank">
[12]	杨彦豪，周建，温晓贵，等. 杭州软黏土非共轴特性的试验研究[J]. 岩土力学，2014，35(10)：2 861-2 867.(YANG Yanhao，ZHOU Jian，WEN Xiaogui，et al. Experimental study of non-coaxiality of Hangzhou soft clay[J]. Rock and Soil Mechanics，2014，35(10)：2 861-2 867.(in Chinese)). " target="_blank">
[1]	郑颖人，沈珠江，龚晓南，等. 岩土塑性力学原理：广义塑性力学[M]. 中国建筑工业出版社，2002.(ZHENG Yingren，SHEN Zhujiang，GONG Xiaonan. The Generalized plastic Mechanics- Principle of Plastic Mechanics for Geotechnique[M]. Beijing：China Architecture and Building Press，2002.(in Chinese)) " target="_blank">
[2]	张敏，杨蕴明，李琦，等. 含主应力轴旋转的朱应力路径对密砂临界状态的影响[J]. 岩石力学与工程学报，2013，32(12)，2 560-2 565. (ZHANG Min，YANG Yunming，LI Qi，et al. Influence of stress paths including principal stress rotation on critical state of dense sand[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(12)：2 560-2 565.(in Chinese)) " target="_blank">
[13]	GUTIERREZ M，ISHIHARA K. Flow theory for sand during rotation of principal stress direction[J]. Soils and foundations，1991，31(4)：121-132. " target="_blank">
[5]	WONG R K S，ARTHUR J R F. Sand Sheared by Stresses with Cyclic Variations in Directions[J]. Geotechnique，1986，36(2)：215-226. " target="_blank">
[9]	CAI Y Y. An experimental study of non-coaxial soil behavior using Hollow Cylinder Testing[Ph. D. Thesis][D]. Nottingham：University of Nottingham，2010. " target="_blank">
[10]	LADE P V，KIRKGARD M M. Effect of stress rotation and changes of b-values on cross-anisotropic behavior of natural，K0-consolidated soft clay [J]. Soils and Foundations，2000，40(6)：93-105. " target="_blank">
[15]	郑鸿镔. 主应力轴旋转下重塑黏土与原状黏土特性试验研究[D]. 杭州：浙江大学，2010.(ZHENG Hongbin. Experimental study of reconstituted clay and intact clay under principal stress rotation[D]. Hangzhou：Zhejiang University，2010.(in Chinese)) " target="_blank">
[16]	沈扬. 考虑主应力方向变化的原状软黏土试验研究[D]. 杭州：浙江大学，2007.(SHEN Yang. Experimental study on effect of variation of principal stress orientation on undisturbed soft clay[D]. Hangzhou：Zhejiang University，2007.(in Chinese)) " target="_blank">
[18]	Hardin B O，Blandford G E. Elasticity of particulate materials[J]. Journal of Geotechnical Engineering，1989，115(6)：788-805. " target="_blank">
[19]	童朝霞，张建民，于艺林，等. 中主应力系数对应力主轴循环旋转条件下砂土变形特性的影响[J]. 岩土工程学报，2009，31(6)：946-952.(TONG Zhaoxia，ZHANG Jianmin，YU Yilin，et al. Effect of intermediate principal stress parameter on deformation behavior of sands under cyclic rotation of principal stress axes[J]. Chinese Journal of Geotechnical Engineering，2009，31(6)：946-952.(in Chinese))
[20]	ISHIHARA K，TOWHATA I. Sand response to cyclic rotation of principal stress directions as induced by wave loads[J]. Soils and Foundations，1983，23(4)：11-26. " target="_blank">
[22]	NAKATA Y，HYODO M，MURATA H. Non-coaxiality of sand subjected to principal stress rotation[C]// Proceedings of the international symposium on prefailure deformation characteristics of geomaterial，Sapporo. Balkema A A. 1994，256-270. " target="_blank">
[17]	ATKINSON J H. Stiffness of fine-grained soil at very small strains[J]. Geotechnique，1995，45(2)：249-265. " target="_blank">
[21]	杨蕴明，柴华友，韦昌富. 非共轴本构模型的数值计算问题[J]. 岩土力学，2010，31(增2)：373-377.(YANG Yunming，CHAI Huayou，WEI Changfu. Numerical implementation of a yield vertex non-coaxial model[J]. Rock and Soil Mechanics，2010，31(Supp.2)：373-377.(in Chinese)) " target="_blank">