砂质卵砾石力学行为与颗粒破碎的试验研究

doi:10.13722/j.cnki.jrme.2019.1009

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摘要荷载作用下粒状岩土材料的颗粒破碎改变了颗粒组构，从而影响其力学特性。为了揭示颗粒破碎对抗剪强度的影响，利用大型真三轴进行一系列不同应力路径的剪切试验，阐述产生不同颗粒破碎形态的破碎机制；论证颗粒破碎是粗粒土抗剪强度非线性变化的重要影响因素，并建立幂函数拟合强度公式。引入由粗粒土非线性强度曲线与线性临界状态线围成面积和线性临界状态线随平均球应力变化面积之比定义的强度因子，描述颗粒破碎对子午平面内临界状态线的影响。强度因子越大，子午平面内临界状态线的非线性变化越突出；平均球应力越大，颗粒破碎对强度变化规律的影响越大。筛分试验结果表明，Marsal颗粒破碎指标与强度因子呈指数关系；粒径大于1 mm颗粒的破碎率随平均主应力的增大而增大，小于1 mm颗粒的破碎率随平均主应力的增大反而衰减的变化规律，内摩擦角与咬合强度随破碎率变化表现出一定的相关性。

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	王永鑫1
	邵生俊1
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	王智1

关键词 ：土力学, 粗粒土, 颗粒破碎, 抗剪强度非线性, 大型真三轴仪, 子午面, 强度因子

Abstract：The particle breakage of granular geomaterials under loading alters the particle composition and further affects their mechanical properties. In order to reveal the effect of particle breakage on shear strength characteristics，a series of true triaxial shearing tests with different stress paths on sandy gravel were carried out by using a large true triaxial apparatus，and the breakage mechanisms of different particle breakage patterns were described. It is revealed that particle breakage is an important factor for the nonlinearity of the shear strength. A power function fitting strength formula was established and the non-linear shear strength indexes were calculated. The influence of particle breakage on the critical state line in meridian plane was described by introducing the strength factor，which is defined by the ratio of the area enclosed by the non-linear strength curve and the linear critical state line to the area under the linear critical state line. The larger the strength factor，the more significant the nonlinear characteristic of the critical state line in meridian plane，and the larger the mean spherical stress，the greater the impact of particle breakage on the shear strength. The sieving results show that the particle breakage rate by Marsal is exponentially related to the strength factor. The variation rules of the internal friction angle and interlocking strength with the index of fine-grained breakage were sorted out. It is shown that the particle breakage rates of particles larger than and less than 1 mm respectively increase and decrease with increasing the mean principal stress. The internal friction angle and occlusion strength show a certain correlation with the change of the breakage rate.

Key words： soil mechanics sandy gravel particle breakage nonlinear characteristics true triaxial test meridian plane strength factor

引用本文:

王永鑫1，邵生俊1，2，王智1. 砂质卵砾石力学行为与颗粒破碎的试验研究[J]. 岩石力学与工程学报, 2020, 39(6): 1287-1296.
WANG Yongxin1，SHAO Shengjun1，2，WANG Zhi1. Experimental study on mechanical behaviors and particle breakage of sandy gravel. , 2020, 39(6): 1287-1296.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2019.1009 或 http://rockmech.whrsm.ac.cn/CN/Y2020/V39/I6/1287

[5]	秦尚林，杨兰强，高惠，等. 不同应力路径下绢云母片岩粗粒料力学特性试验研究[J]. 岩石力学与工程学报，2014，33(9)：1 932-1 938.(QIN Shanglin，YANG Lanqiang，GAOHui，et al. Experimental study of mechanical properties of coarse aggregates of sericite schist under different stress paths[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(9)：1 932-1 938.(in Chinese))
[7]	吕擎峰，殷宗泽. 非线性强度参数对高土石坝坝坡稳定性的影响[J]. 岩石力学与工程学报，2004，24(16)：2 708-2 711.(LU Qingfeng，YIN Zongze. Nonlinear strength parameters effects on the slope stability of high rockfill dam[J]. Chinese Journal of Rock Mechanics and Engineering，2004，24(16)：2 708-2 711.(in Chinese))
[14]	KUMAR N，IMOLE O I，MAGNANIMO V，et al. Effects of polydispersity on the micro-macro behavior of granular assemblies under different deformation paths[J]. Particuology，2014，12：64-79.
[16]	NOUGUIER-LEHON C，CAMBOU B，VINCENS E. Influence of particle shape and angularity on the behaviour of granular materials： A numerical analysis[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2003，27：1 207-1 226.
[20]	郭庆国. 粗粒土的工程特性及应用[M]. 郑州：黄河水利出版社，1998：199-204.(GUO Qingguo. Engineering characteristics and application of coarse grained soil[M]. Zhengzhou：The Yellow River Water Conservancy Press，1998：199-204.(in Chinese))
[23]	中华人民共和国行业标准编写组. DL /T5356—2006水电水利工程粗粒土试验规程[S]. 北京：中国电力出版社，2007.(People¢s Republic of China profession standard. DL /T5356—2006 Code for coarse-grained soil tests for hydropower and water conservancy engineering[S]. Beijing：China Electric Power Press，2007.(in Chinese))
[25]	MARSAL R J. Large-scale testing of rockfill materials[J]. Journal of the Soil Mechanics and Foundations Division，1967，93(2)：27-43.
[1]	杨光，张丙印，于玉贞，等. 不同应力路径下粗粒料的颗粒破碎试验研究[J]. 水利学报，2010，41(3)：338-342.(YANG Guang，ZHANG Bingyin，YU Yuzhen，et al. An experimental study on particle breakage of coarse-grained materials under various stress paths[J]. Journal of Hydraulic Engineering，2010，41(3)：338-342.(in Chinese))
[10]	孔亮，彭仁. 颗粒形状对类砂土力学性质影响的颗粒流模拟[J]. 岩石力学与工程学报，2011，30(10)：2 112-2 119.(KONG Liang，PENG Ren. Particle flow simulation of influence of particle shape on mechanical properties of quasi-sands[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(10)：2 112-2 119.(in Chinese))
[19]	DUNCAN J M，WONG K S，MABRY P，et al. Strength，stress-strain and bulk modulus parameters for finite element analyses of stresses and movements in soil masses[J]. Journal of Consulting and Clinical Psychology，1980，49(4)：554-567.
[3]	蔡正银，李小梅，韩林，等. 考虑级配和颗粒破碎影响的堆石料临界状态研究[J]. 岩土工程学报，2016，38(8)：1 357-1 364.(CAI Zhengyin，LI Xiaomei，HAN Lin，et al. Critical state of rockfill materials considering particle gradation and breakage[J]. Chinese Journal of Geotechnical Engineering，2016，38(8)：1 357-1 364.(in Chinese))
[12]	王子寒，王鹏举，景晓昆，等. 粗粒土颗粒接触力学特性及细观接触模型研究[J]. 岩石力学与工程学报，2018，37(8)：1 980-1 992. (WANG Zihan，WANG Pengju，JING Xiaokun，et al. A study on inter-particle contact behaviors and micro contact models of coarse-grained soil[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(8)：1 980-1 992.(in Chinese))
[21]	MELLO V F B D.，"Reflection on decisions of practical significance to embankment dam constitution：17th rankine lecture[J]. Geotechnique，1977，27(3)：281-355.
[2]	LUZZANI L，COOP M R. On the relationship between particle breakage and the critical state of sands[J]. Soils and Foundations，2002，42(2)：71-82.
[4]	张季如，张弼文，胡泳，等. 粒状岩土材料颗粒破碎演化规律的模型预测研究[J]. 岩石力学与工程学报，2016，35(9)：1 898-1 905. (ZHANG Jiru，ZHANG Biwen，HU Yong，et al. Predicting the particle breakage of granular geomaterials[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(9)：1 898-1 905.(in Chinese))
[6]	高玉峰，张兵，刘伟，等. 堆石料颗粒破碎特征的大型三轴试验研究[J]. 岩土力学，2009，30(5)：1 237-1 240.(GAO Yufeng，ZHANG Bing，LIU Wei，et a1. Experimental study on particle breakage behavior of rockfills in large-scale triaxial tests]. Rock and Soil Mechanics，2009，30(5)：1 237-1 246.(in Chinese))
[8]	陈立宏，陈祖煜. 堆石非线性强度特性对高土石坝稳定性的影响[J]. 岩土力学，2007，28(9)：1 807-1 810.(CHEN Lihong，CHEN Zuyu. Effect of nonlinear strength of rockfill on slope stability of high earth-rock dam[J]. Rock and Soil Mechanics，2007，28(9)：1 807- 1 810.(in Chinese))
[9]	ALIKARAMI R，ANDÒ，E，GKIOUSAS-KAPNISIS M，et al. Strain localisation and grain breakage in sand under shearing at high mean stress：insights from in situ X-ray tomography[J]. Acta Geotechnica，2015，10(1)：15-30.
[11]	钱劲松，陈康为，张磊. 粒料固有各向异性的离散元模拟与细观分析[J]. 力学学报，2018，50(5)：73-82.(QIAN Jinsong，CHEN Kangwei，ZHANG Lei. Simulation and micro-mechanics analysis of inherent anisotropy of granular by distinct element method[J]. Chinese Journal of Theoretical and Applied Mechanics，2018，50(5)：73-82. (in Chinese))
[13]	孙其诚，程晓辉，季顺迎，等. 岩土类颗粒物质宏-细观力学研究进展[J]. 力学进展，2011，41(3)：351-371.(SUN Qicheng，CHENG Xiaohui，JI Shunying，et al. Advances in the micro-macro mechanics of granular soil materials[J]. Advances in Mechanics，2011，41(3)：351-371.(in Chinese))
[15]	张翀，舒赣平. 颗粒形状对颗粒流模拟双轴压缩试验的影响研究[J]. 岩土工程学报，2009，31(8)：1 281-1 286.(ZHANG Chong，SHU Gan-ping. Effect of particle shape on biaxial tests simulated by particle flow code[J]. Chinese Journal of Geotechnical Engineering，2009，31(8)：1 281-1 286.(in Chinese))
[17]	日本土质工学会. 粗粒料的现场压实[M]. 郭熙灵，文丹，译. 北京：中国水利水电出版社，1999：6-7.(Japanese Soil Engineering Society. Field compaction of coarse soils[M]. Translated by GUO Xiling，WEN Dan. Beijing：China Water Power Press，1999：6-7. (in Chinese))
[18]	陈梁生，陈仲颐，李锦坤，等. 关于密实砂卵石和砂的抗剪强度及边坡稳定探讨[C]// 第一届土力学及基础工程学术会议. 北京：中国工业出版社，1964：93-99. (CHEN Liangsheng，CHEN Zhongyi，LI Jinkun，et a1. Discussion on shear strength and slope stability of dense sandy gravel and sand[C]// The First Academic Conference on Soil Mechanics and Foundation Engineering. Beijing：China Industry Press，1964：93-99.(in Chinese))
[22]	邵生俊，王永鑫. 刚柔混合型大型真三轴仪研制与验证[J]. 岩土工程学报，2019，41(8)：1 418-1 426.(SHAO Shengjun，WANG Yongxin. Development and verification of large-scale true triaxial apparatus with rigid-flexible-flexible loading boundary mechanism[J]. Chinese Journal of Geotechnical Engineering，2019，41(8)：1 418-1 426.(in Chinese))
[24]	FROSSARD E，DANO C，HU W，et al. Rockfill shear strength evaluation：a rational method based on size effects[J]. Géotechnique，2012，62(5)：415-427.