SIMULATION MODELING AND SAMPLE SIZE EFFECT ANALYSIS FOR GRAVEL SOIL TRIAXIAL TEST

DONG Hui; LUO Xiao; LUO Zheng-dong; WANG Zhi-chao

Volume 22 Issue 1

Mar. 2016

Turn off MathJax

Article Contents

Article Navigation > Journal of Geomechanics > 2016 > 22(1): 104-113

DONG Hui, LUO Xiao, LUO Zheng-dong, et al., 2016. SIMULATION MODELING AND SAMPLE SIZE EFFECT ANALYSIS FOR GRAVEL SOIL TRIAXIAL TEST. Journal of Geomechanics, 22 (1): 104-113.

Citation:

DONG Hui, LUO Xiao, LUO Zheng-dong, et al., 2016. SIMULATION MODELING AND SAMPLE SIZE EFFECT ANALYSIS FOR GRAVEL SOIL TRIAXIAL TEST. Journal of Geomechanics, 22 (1): 104-113.

Citation:

DONG Hui, LUO Xiao, LUO Zheng-dong, et al., 2016. SIMULATION MODELING AND SAMPLE SIZE EFFECT ANALYSIS FOR GRAVEL SOIL TRIAXIAL TEST. Journal of Geomechanics, 22 (1): 104-113.

PDF( 4707 KB)

SIMULATION MODELING AND SAMPLE SIZE EFFECT ANALYSIS FOR GRAVEL SOIL TRIAXIAL TEST

1.
College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan, 411105, China
2.
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China

More Information

Received: 2015-09-02
Published: 2016-03-01

Abstract

Abstract

Based on the size effect in the gravel soil physics experiment, mechanical properties of the stress-strain, the strain, the cohesive force and inner friction angle of gravel soil was analyzed using discrete element theory and indoor triaxial test. The results showed that the proposed block generated law could realize the simulation of the crushed stone much more. The stress strain curves were almost unanimous (2% strain) at different diameter and height, but the rear part of the curve changes greatly, the smaller the diameter and height, the lower confining pressure stress, the more obvious softening phenomenon. The residual stress was constant after diameter 250 mm, height 350 mm. The peak stress increased with a linear growth rate of 25% with the sample diameter, but nonlinear growth along with the increase of height, when less than 200 mm, the high growth rate was 11.9%, and 28.9% after 200 mm. Damage body strain values were first increasing then decreasing, at the same time cohesive force increases of the linear growth with the diameter and in friction angle was reduced, but rule was just the opposite at different height.
- gravel soil,
- triaxial simulation,
- size effect

FullText(HTML)

References(15)

References

[1]	谈云志, 郑爱, 吴翩, 等.红黏土承载比的土团尺寸效应研究[J].岩土力学, 2013, 34(5):1242~1246 http://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201305002.htm TAN Zhi-yun, ZHEN Ai, WU Pian, et al. Effect of aggregate soil size on Californi a bearing ratio values of laterite soil[J]. Rock and soil mechanics, 2013, 34(5): 1242~1246. http://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201305002.htm
[2]	凌华, 殷宗泽, 朱俊高, 等.堆石料强度的缩尺效应试验研究[J].河海大学学报, 2011, 39(5):540~544 http://www.cnki.com.cn/Article/CJFDTOTAL-HHDX201105016.htm LING Hua, YIN Zong-ze, ZHU Jun-gao, et al. Experimental studyof scaleeffect onstrengthof rockfill materials[J]. Journal of HohaiUniversity, 2011, 39(5): 540~544. http://www.cnki.com.cn/Article/CJFDTOTAL-HHDX201105016.htm
[3]	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 http://www.cnki.com.cn/Article/CJFDTOTAL-YSLX200702010.htm XU Wen-jie, HU Rui-lin, YUE Zhong-qi, 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. http://www.cnki.com.cn/Article/CJFDTOTAL-YSLX200702010.htm
[4]	The Influence of Rock Block Contents on Geo-Mechanical Behavior of Soil-Rock Mixture[C] //2012颗粒材料计算力学研究进展. 2012. http://cpfd.cnki.com.cn/Article/CPFDTOTAL-DLLG201209001032.htm
[5]	狄圣杰, 汪明元, 邓南沙, 等.土石混合体REV尺度数值方法研究[J].防灾减灾工程学报, 2012, 32(5):523~526 http://www.cnki.com.cn/Article/CJFDTOTAL-DZXK201205002.htm DI Sheng-jie, WANG Yuan-ming, DENG Nan-sha, et al. Numerical Simulation Study on REV's Measure of Soil-rock Mixture[J]. Disaster Prevention and Mitigation Engineering, 2012, 32(5): 523~526. http://www.cnki.com.cn/Article/CJFDTOTAL-DZXK201205002.htm
[6]	Minneapolis M. PFC2D particle flow code in 2 dimensions theory and background [R]. Itasca Consulting Group Incorporation, 2004. doi: 10.1134/S1062739116041046
[7]	刘宝琛, 张家生, 杜奇中, 等.岩石抗压强度的尺寸效应[J].岩石力学与工程学报, 1998, 17(5):611~614 http://www.cnki.com.cn/Article/CJFDTOTAL-DZLX201702017.htm LIU Bao-chen, ZHANG Jia-sheng, DU Qi-zhong, et al. A study of size effect for compression strength of rock[J]. Chinese Journal of Rock Mechanics and Engineering, 1998, 17(5): 611~614. http://www.cnki.com.cn/Article/CJFDTOTAL-DZLX201702017.htm
[8]	潘一山, 魏建明.岩石材料应变软化尺寸效应的试验和理论研究[J].岩石力学与工程学报, 2002, 21(2):215~218 http://www.cnki.com.cn/Article/CJFDTOTAL-YSLX200202013.htm PAN Yi-shan, WEI Jian-ming. Experimental and theoretical study on size effect on strain softening of rock materials[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(2): 215~218. http://www.cnki.com.cn/Article/CJFDTOTAL-YSLX200202013.htm
[9]	李翀, 何昌荣, 王琛, 等.粗粒料大型三轴试验的尺寸效应研究[J].岩土力学, 2008, 29(增刊):563~566 http://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2008S1113.htm LI Xu, HE Chang-rong, WANG Chen, et al. Study of scale effect of lage-scale triaxial test of coarse-grained meterials[J]. Rock and soil mechanics, 2008, 29(Supplement.): 563~566. http://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2008S1113.htm
[10]	阳云华, 赵晏, 关沛强, 等.膨胀土抗剪强度的尺寸效应研究[J].人民长江, 2007, 38(9):18~22 http://www.cnki.com.cn/Article/CJFDTOTAL-RIVE200709010.htm YANG Yun-hua, ZHAO Yan, GUAN Pei-qiang, et al. A study of size effect for shear strength of the expansive soil[J]. Ren Min Chang Jiang Journal, 2007, 38(9): 18~22. http://www.cnki.com.cn/Article/CJFDTOTAL-RIVE200709010.htm
[11]	杨圣奇, 苏承东, 徐卫亚, 等.岩石材料尺寸效应的试验和理论研究[J].工程力学, 2005, 22(4):112~118 http://www.cnki.com.cn/Article/CJFDTOTAL-GCLX200504021.htm YANG Sheng-qi, SU Cheng-dong, XU Wei-ya, et al. Experimental and theoretical study of size effect on of rock material[J]. Engineering mechanics, 2005, 22(4): 112~118. http://www.cnki.com.cn/Article/CJFDTOTAL-GCLX200504021.htm
[12]	吕兆兴, 冯增朝, 赵阳升, 等.岩石的非均质性对其材料强度尺寸效应的影响[J].煤炭学报, 2007, 32(9):917~920 http://www.cnki.com.cn/Article/CJFDTOTAL-MTXB200709004.htm LV Zhao-xing, FENG Zeng-chao, ZHAO Yang-shen, et al. Influence of rock in homogeneity on strength2size effect of rock materials[J]. Journal of coal, 2007, 32(9): 917~920. http://www.cnki.com.cn/Article/CJFDTOTAL-MTXB200709004.htm
[13]	肖昭然, 胡霞光, 刘玉, 等.沥青混合料细观结构离散元分析[J].公路, 2007, (4):146~148 http://www.cnki.com.cn/Article/CJFDTOTAL-GLGL200704039.htm XIAO Zhao-ran, HU Xia-guang, LIU Yu, et al. Discrete element method analysis for micro structure of asphalt mixtures [J]. High Way, 2007, (4): 146~148. http://www.cnki.com.cn/Article/CJFDTOTAL-GLGL200704039.htm
[14]	李耀旭. 颗粒流方法在土石混合体力学特性研究中的应用[D]. 长江科学院, 2009 http://cdmd.cnki.com.cn/Article/CDMD-10611-1016731846.htm LI Yao-xu. The application of particle flow code in studing of mechanical characteristics of soil-rock mixture [D]. Yangtze River Scientific Research Institute, 2009. http://cdmd.cnki.com.cn/Article/CDMD-10611-1016731846.htm
[15]	王新. 土石混合体力学特性影响因素及破坏机制研究[D]. 长江科学院, 2010 http://cpfd.cnki.com.cn/Article/CPFDTOTAL-DZDQ201501006007.htm WANG Xin. Research on influence factors of mechanics charateristics and failure mechanism of soil-rock mixture [D]. Yangtze River Scientific Research Institute, 2010. http://cpfd.cnki.com.cn/Article/CPFDTOTAL-DZDQ201501006007.htm