基于真实块石形态的土石混合体细观力学三维数值直剪试验研究

doi:10.13722/j.cnki.jrme.2015.0927

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摘要块石形态是影响土石混合体细观结构及宏细观力学特性的一个重要因素。提出一种基于真实块石形态的土石混合体细观力学研究方法，首先采用三维扫描技术建立块石三维形态数据库，然后根据粒度组成生成试样内部块石三维空间分布模型，从而构建土石混合体的数字模型。利用所提出的基于多球颗粒均匀接触的复杂块体表征算法，实现任意复杂形态块体的多球颗粒均匀、紧密接触填充。基于上述方法，建立土石混合体离散元数值计算分析模型，并协同现场试验结果开展三维数值直剪试验研究。根据土体的现场试验结果反演得到离散元数值试验中土颗粒的细观接触力学参数，将其应用于土石混合体数值试验得到了较好的效果。通过数值试验研究表明，土石混合体在剪切过程中的块石效应，使剪切带变得更加宽厚和曲折，在宏观上造成了试样的内摩擦角有增高趋势；而由于块石含量增加，使得其黏结作用的土体含量减小，从而在宏观上表现为试样黏聚力呈略有降低趋势。

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关键词 ：土力学, 土石混合体, 细观结构, 真实形态, 离散元, 细观力学

Abstract：The shape of the rock block influence greatly the meso-structure and macro-meso mechanical behaviour of soil-rock mixture(S-RM). In this paper，a method for the study of meso-mechanics of S-RM based on the real shape of rock blocks was presented. Firstly，the database of 3D geometric model of rock blocks was built based on 3D scanning technology. Then，with the database and the block size distribution，a special 3D model of S-RM with rock blocks was generated. A numerical model of S-RM sample was also generated. Furthermore，using the proposed multi-sphere modelling method of complex blocks，arbitrary particles can be modelled with the multi-spheres contacted uniformly and closely. As a result，a 3D DEM meso-structural model of S-RM sample was generated. In accordance with the field test，a series of 3D numerical direct shear tests were carried out. The meso-mechanical parameters of the soil particles used in the DEM numerical test were obtained from the field tests. The results of numerical tests indicated that the rock blocks made the shear zone of the S-RM sample wider and more zigzag than that of the soil sample，which induced the higher friction angle of the former. However， with the increase of the rock block content，the content of the fine soil particles with binding function decreased. As a result，the cohesion of S-RM was smaller than that of the soil sample.

Key words： soil mechanics soil-rock mixture(S-RM) meso-structure real shape discrete element method (DEM) meso-mechanics

引用本文:

徐文杰1，2，王识2. 基于真实块石形态的土石混合体细观力学三维数值直剪试验研究[J]. 岩石力学与工程学报, 2016, 35(10): 2152-2160.
XU Wenjie1，2，WANG Shi2. Meso-mechanics of soil-rock mixture with real shape of rock blocks based on 3D numerical direct shear test. , 2016, 35(10): 2152-2160.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2015.0927 或 http://www.rockmech.org/CN/Y2016/V35/I10/2152

[8]	OLAD K，AYLIN A. Numerical study of localization in soil systems[J]. Computers and Geotechnics，2005，32(8)：600-612.
[5]	SPRINGMAN S M，JOMM C，TEYSSEIRE R. Instabilities on moraine slopes induced by loss of suction：a case history[J]. Geotechnique，2003，53(1)：3-10. " target="_blank">
[17]	赵金凤，严颖，季顺迎. 基于离散元模型的土石混合体直剪试验分析[J]. 固体力学学报，2014，35(2)：124-134.(ZHAO Jinfeng，YAN Ying，JI Shunying. Analysis of direct shear test of soil-rock mixture based on discrete element model[J]. Chinese Journal of Solid Mechanics，2014，35(2)：124-134.(in Chinese)) " target="_blank">
[19]	金磊，曾亚武，李欢，等. 基于不规则颗粒离散元的土石混合体大三轴数值模拟[J]. 岩土工程学报，2015，37(5)：829-838.(JIN Lei，ZENG Yawu，LI Huan，et al. Numerical simulation of large-scale triaxial tests on soil-rock mixture based on DEM of irregularly shaped particles[J]. Chinese Journal of Geotechnical Engineering，2015，37(5)：829-838.(in Chinese))
[26]	GARCIA X，LATHAM J P，XIANG J，et al. A clustered overlapping sphere algorithm to represent real particles in discrete element modeling[J]. Géotechnique，2009，59(9)：779-784. " target="_blank">
[4]	XU W J，HU R L，TAN R J. Some Geomechanical Properties of Soil-Rock Mixtures in the Hutiao Gorge Area，China[J]. Geotechnique，2007，57(3)：255-264. " target="_blank">
[6]	COLI N，BERRY P，BOLDINI D. In-situ non-conventional shear tests for the mechanical characterisation of a bimrock[J]. International Journal of Rock Mechanics and Mining Sciences，2011，48(1)：95-102.
[7]	CODUTO D，SCOTT J，MCMILLAN K，et al. Shear strength characterization and stability assessment of urban open-pit mine slopes[J]. Geo-congress，2013：167-181. " target="_blank">
[10]	廖秋林. 土石混合体地质成因、结构模型及力学特性、流固耦合特性研[博士学位论文][D]. 北京：中国科学院地质与地球物理研究所，2006.(LIAO Qiulin. Geological originand structure model of rock and soil aggregate and study on its mechanical and propreties[Ph. D. Thesis][D]. Beijing：Institute of Geology and Geophysics，Chinese Academy of Sciences，2006.(in Chinese)) " target="_blank">
[12]	徐文杰. 土石混合体细观结构力学及其边坡稳定性研究[博士学位论文][D].北京：中国科学院地质与地球物理研究所，2008.(XU WenJie. Study on meso-structural mechanics(M-SM) of soil-rock mixture(S-RM) and its slope stability[Ph. D. Thesis][D]. Beijing：Institute of Geology and Geophysics，Chinese Academy of Sciences，2008.(in Chinese)) " target="_blank">
[14]	丁秀丽，李耀旭，王新. 基于数字图像的土石混合体力学性质的颗粒流模拟[J]. 岩石力学与工程学报，2010，29(3)：477-484. (DING Xiuli，LI Yaoxu，WANG Xin. Particle flow modeling mechanical properties of soil and rock mixtures based on digital image[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(3)：477-484.(in Chinese))
[16]	贾学明，柴贺军，郑颖人. 土石混合料大型直剪试验的颗粒离散元细观力学模拟研究[J]. 岩土力学，2010，31(9)：2 695-2 703.(JIA Xueming，CHAI Hejun，ZHENG Yingren. Mesomechanics research of large direct shear test on soil and rock aggregate mixture with particle flow code simulation[J]. Rock and Soil Mechanics，2010，31(9)： 2 695-2 703.(in Chinese)) " target="_blank">
[3]	徐文杰，胡瑞林，曾如意. 水下土石混合体的原位大型水平推剪试验研究[J]. 岩土工程学报，2006，28(7)：814-818.(XU Wenjie，HU Ruilin，ZENG Ruyi. Research on horizontal push-shear in-situ test of subwater soil-rock mixture[J]. Chinese Journal of Geotechnical and Engineering，2006，28(7)：814-818.(in Chinese))
[9]	油新华. 土石混合体的随机结构模型及其应用研究[J]. 岩石力学与工程学报，2002，21(11)：1 748.(YOU Xinhua. Stochastic structural model of the earth-rock aggregate and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(11)：1 748.(in Chinese)) " target="_blank">
[15]	李世海，汪远年. 三维离散元土石混合体随机计算模型及单向加载试验数值模拟[J]. 岩土工程学报，2004，26(3)：172-177.(LI Shihai，WANG Yuannian. Stochastic model and numerical simulation of uniaxial loading test for rock and soil blending by 3D-DEM[J]. Chinese Journal of Geotechnical Engineering，2004，26(3)：172-177.(in Chinese)) " target="_blank">
[21]	MCDOWELL G R，HARIRECHE O. Discrete element modelling of yielding and normal compression of sand[J]. Géotechnique，2002，52(4)：299-304. " target="_blank">
[27]	KOZICKI J，DONZE F V. A new open-source software developed for numerical simulations using discrete modeling methods[J]. Computer Methods in Applied Mechanics and Engineering，2008，197(S45/50)： 429-443. " target="_blank">
[2]	赫建明. 三峡库区土石混合体的变形与破坏机制研究[博士学位论文][D]. 北京：中国矿业大学，2004.(HAO Jianming. Study of deformation and failure mechanisms of rock-soil aggregate in Three Gorges reservoir area[Ph. D. Thesis][D]. Beijing：China University of Mining and Technology，2004.(in Chinese)) " target="_blank">
[24]	ERGENZINGER C，SEIFRIED R，EBERHARD P. A discrete element model predicting the strength of ballast stones[J]. Computers and Structures，2012，108-109：3-13. " target="_blank">
[1]	XU W J，YUE Z Q，HU R L. Study on the mesostructure and mesomechanical characteristics of the soil-rock mixture using digital image processing based finite element method[J]. International Journal of Rock Mechanics and Mining Sciences，2008，45(5)：749-762.
[13]	徐文杰，胡瑞林，王艳萍. 基于数字图像的非均质岩土材料细观结PFC2D模型的自动生成[J]. 煤炭学报，2007，32(4)：358-362.(XU Wenjie，HU Ruilin，WANG Yanping. Digital image processing based model building of PFC2D for mesostructure of inhomogeneous geomaterial[J]. Journal of China Coal Society，2007，32(4)：358-362.(in Chinese))
[25]	CHANG Y L，CHU B L，LIN S S. Numerical simulation of gravel deposits using mult-circle granular model[J]. Journal of the Chinese Institute of Engineering，2003，26(5)：681-694. " target="_blank">
[11]	徐文杰，胡瑞林，岳仲琦，等. 土石混合体细观结构及力学特性数值模拟研究[J]. 岩石力学与工程学报，2007，26(2)：300-311.(XU Wenjie，HU Ruilin，YUE Zhongqi，et al. The meso structure character and numerical simulation of mechanical speciality of soil/rock mixtures[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(2)：300-311.(in Chinese))
[20]	中国电建集团昆明勘测设计研究院. 云南省澜沧江糯扎渡水电站招标设计阶段—心墙防渗料碾压试验研究报告[R]. 昆明：中国电建集团昆明勘测设计研究院，2006.(HydroChina Kunming Engineering Corporation. Research report at design stage ofNuozhadu hydropower station at LancangRiver，Yunnan province-Rolling compaction test of the core wall material[R]. Kunming：HydroChina Kunming Engineering Corporation，2006.(in Chinese)) " target="_blank">
[23]	JERIER J F，RICHEFEU V，IMBAULT D，et al. Packing spherical discrete elements for large scale simulations[J]. Computer Methods in Applied Mechanics and Engineering，2010，199(S25/28)：1 668- 1 676. " target="_blank">
[18]	徐文杰，张海洋，许强，等. 土石混合体直剪离散元数值试验研究[J]. 计算力学学报，2014，(2)：228-234.(XU Wenjie，ZHANG Haiyang，XU Qiang，et al. Numerical simulations of direct shear test with soil-rock mixture using discrete element method[J]. Chinese Journal of Computational Mechanics，2014，(2)：228-234.(in Chinese)) " target="_blank">
[22]	MATSUSHIMA T，KATAGIRI J，UESUGI K，et al. 3D shape characterization and image-based DEM simulation of the lunar soil simulant FJS-1[J]. Journal of Aerospace Engineering，2009，22(1)：15-23. " target="_blank">