土石混合体变形破坏结构效应的CT试验研究

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Abstract In order to study the structure effects，interior structural deformation of rock and soil aggregate(RSA) under uniaxial compression is studied through the X-ray computed tomography(CT) real-time scanning tests. Based on the scan orientation principle of CT，movement of rock fragments in RSA is analyzed. Moreover，the relationship between interior structural deformation and macroscopic deformation of RSA is studied. The results show that macroscopic deformation and failure of RSA are mainly caused by the position adjustment of interior rock fragments. It is also shown that the integral deformation of rock fragments in RSA can be represented by equivalent structure deformation. By using the method of image threshold segmentation，profiles of the sample are obtained and analyzed. The profiles indicate that interior damage and cracks of sample initiate from the contact zone between rock fragments and soil，and then extend around rock fragments，until they form fracture planes. The results can provide theoretical basis for the monitoring and warning of RSA slope.

Key words： soil mechanics rock and soil aggregate(RSA) structure effects uniaxial experiment with CT technique deformation and failure mechanism

Received: 24 February 2012

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3134

[1]	油新华. 土石混合体的随机结构模型及其应用研究[博士学位论文][D]. 北京：北方交通大学，2001.(YOU Xinhua. Stochastic structural model of the earth-rock aggregate and its application[Ph. D. Thesis][D]. Beijing：Northern Jiaotong University，2001.(in Chinese)) " target="_blank">
[2]	LI X，LIAO Q L，HE J M. In-situ tests and a stochastic structural model of rock and soil aggregate in the Three Gorges Reservoir area，China[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(3)：494-498. " target="_blank">
[3]	廖秋林，李晓，朱万成，等. 基于数码图像土石混合体结构建模及其力学结构效应的数值分析[J]. 岩石力学与工程学报，2010，29(1)：155-162.(LIAO Qiulin，LI Xiao，ZHU Wancheng，et al. Structure model construction of rock and soil aggregate based on digital image technology and its numerical simulation on mechanical structure effects[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(1)：155-162.(in Chinese))
[4]	成国文. 三峡库区堆积层斜坡稳定性分级与应用研究[博士学位论文][D]. 北京：中国科学院研究生院，2009.(CHENG Guowen. Development of classification scheme on the stability of accumulative slopes and its application in Three Gorges Reservoir area[Ph. D. Thesis][D]. Beijing：Graduate University of Chinese Academy of Sciences，2009.(in Chinese)) " target="_blank">
[5]	SONMEZ H，GOKCEOGLU C，TUNCAY E，et al. Relationships between volumetric block proportions and overall UCS of a volcanic bimrock[J]. International Journal of Rock Mechanics and Mining Sciences，2004，22(5)：27-34. " target="_blank">
[6]	田永铭，郭明传，古智君. 宏观各向同性混杂岩力学特性及性状研究[J]. 岩土工程学报，2006，28(3)：363-371.(TIAN Yongming，GUO Mingchuan，GU Zhijun. Mechanical properties and behaviors of macroscopically isotropic mélange[J]. Chinese Journal of Geotechnical Engineering，2006，28(3)：363-371. (in Chinese))
[7]	赵川，石晋旭，唐红梅. 三峡库区土石比对土体强度参数影响规律的试验研究[J]. 公路，2006，(11)：32-35.(ZHAO Chuan，SHI Jinxu，TANG Hongmei. Test and research on influence law of soil-rock ratio in Three Gorges reservoir region on soil strength parameters[J]. Highway，2006，(11)：32-35.(in Chinese)) " target="_blank">
[8]	董云. 土石混合料强度特性的试验研究[J]. 岩土力学，2007，28(6)：1 269-1 274.(DONG Yun. Experimental study on intensity character of rock-soil aggregate mixture[J]. Rock and Soil Mechanics，2007，28(6)：1 269-1 274.(in Chinese)) " target="_blank">
[9]	HE J M，LI X，LI T F，et al. Modeling of rock and soil aggregate under the condition of uniaxial compression[J]. Advanced Materials Research，2011，243-249：55-60. " target="_blank">
[10]	FROST J D，DEJONG J T，RECALDE M. Shear failure behavior of granular-continuum interfaces[J]. Engineering Fracture Mechanics，2002，69(17)：2 029-2 048. " target="_blank">
[11]	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.(HE 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">
[12]	杨冰，杨军，常在，等. 土石混合体压缩性的三维颗粒力学研究[J]. 岩土力学，2010，31(5)：1 645-1 650.(YANG Bing，YANG Jun，CHANG Zai，et al. 3D granular simulation for compressibility of soil-aggregate mixture[J]. Rock and Soil Mechanics，2010，31(5)：1 645-1 650.(in Chinese)) " target="_blank">
[13]	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(2)：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(2)：172-177.(in Chinese))
[14]	徐文杰，胡瑞林，岳中琦，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. Mesostructural character and numerical simulation of mechanical properties of soil-rock mixtures[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(2)：300-311.(in Chinese))
[15]	周火明，杨宇，张宜虎，等. 多裂纹岩石单轴压缩渐进破坏过程精细测试[J]. 岩石力学与工程学报，2010，29(3)：465-470.(ZHOU Huoming，YANG Yu，ZHANG Yihu，et al. Fine test on progressive fracturing process of multi-crack rock samples under uniaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(3)：465-470.(in Chinese))
[16]	朱红光，谢和平，易成，等. 岩石材料微裂隙演化的 CT 识别[J].岩石力学与工程学报，2011，30(6)：1 230-1 238.(ZHU Hongguang，XIE Heping，YI Cheng，et al. CT identification of microcracks evolution for rock materials[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(6)：1 230-1 238.(in Chinese)) " target="_blank">
[17]	李廷春，吕海波. 三轴压缩载荷作用下单裂隙扩展的 CT 实时扫描试验[J]. 岩石力学与工程学报，2010，29(2)：289-296.(LI Tingchu，LU Haibo. CT real-time scanning tests on single crack propagation under triaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：289-296.(in Chinese))
[18]	雷胜友，唐文栋. 黄土在受力和湿陷过程中微结构变化的CT扫描分析[J]. 岩石力学与工程学报，2004，23(24)：4 166-4 169.(LEI Shengyou，TANG Wendong. Analysis of microstructure change for loess in the process of loading and collapse with CT scanning[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(24)：4 166-4 169.(in Chinese)) " target="_blank">
[19]	姜景山，程展林，刘汉龙，等. 粗粒土二维模型试验的组构分析[J]. 岩土工程学报，2009，31(5)：811-817.(JIANG Jingshan，CHENG Zhanlin，LIU Hanlong，et al. Fabric analysis of two- dimensional tests for coarse-grained soils[J]. Chinese Journal of Geotechnical Engineering，2009，31(5)：811-817.(in Chinese))
[20]	程展林，吴良平，丁红顺. 粗粒土组构之颗粒运动研究[J]. 岩土力学，2007，28(增)：29-33.(CHENG Zhanlin，WU Liangping，DING Hongshun. Research on movement of particle of fabric of granular material[J]. Rock and Soil Mechanics，2007，28(Supp.)：29-33.(in Chinese)) " target="_blank">