考虑颗粒破碎影响的粗粒土临界状态研究

武颖利; 皇甫泽华; 郭万里; 张兆省

doi:10.11779/CJGE2019S2007

考虑颗粒破碎影响的粗粒土临界状态研究 English Version

1. 南京水利科学研究院岩土工程研究所,江苏南京 210024;
2. 河南省前坪水库建设管理局,河南郑州 450003

基金项目: 国家重点研发计划重点专项项目（2017YFC0404806）; 河南省水利科技攻关计划项目（GG201705）; 中央级公益性科研院所基本科研业务费专项资金项目（Y318005）

详细信息

作者简介:
武颖利(1980— ),男,博士,高级工程师,主要从事水工结构、土石坝与堤坝工程数值计算等研究。E-mail: wuyingli@nhri.cn。

通讯作者:
郭万里，E-mail：guowljs@163.com

计量
- 文章访问数: 0150
- HTML全文浏览量: 0
- PDF下载量: 0113
出版历程
- 收稿日期: 2019-04-29
- 发布日期: 2019-07-19

Influences of particle breakage on critical state of coarse-grained soils

1. Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, China;
2. Construction Management Bureau of Qianping Reservoir, Henan Province, Zhengzhou 450003, China

摘要

摘要: 粗粒土的临界状态是构建本构模型的重要工具,目前考虑颗粒破碎影响的粗粒土临界状态并不明确。通过大型三轴CD试验,研究了粗粒土在临界状态时的颗粒破碎规律和应力变形特性,探讨了颗粒破碎对粗粒土临界状态应力比和临界状态方程参数的影响。主要结论如下：①粗粒土的临界状态应力比M_c并不是定值,而是与围压之间呈现出非线性的关系;②初始孔隙比对于临界状态应力比M_c的影响则可以忽略;③初始级配相同,围压和初始孔隙比不同的粗粒土,其临界状态在e-(p/p_a)^ξ平面可以用同一条直线来描述,且直线的参数是与初始孔隙比和围压无关的常数。
- 粗粒土 /
- 颗粒破碎 /
- 临界状态 /
- 三轴试验
Abstract: The critical state of coarse-grained soils is the important tool to study the constitutive model, however, the critical state of coarse soil considering the effect of particle breakage is not clear. The influences of particle breakage on the stress and deformation properties and the critical state of rockfills are studied through the large-scale triaxial CD tests. The main conclusions are as follows: (1) The critical-state stress ratio M_c of rockfill materials is not a constant, which is found to be passively correlated with the confining pressure. (2) While the effect of void ratio on M_c can be neglected. (3) The critical state of rockfill samples with different confining pressures and void ratios can be described by the same straight line in e-(p/p_a)^ξ plane, and the parameters of the straight line are constant.
- coarse-grained soil /
- particle breakage /
- critical state /
- triaxial test

HTML全文

参考文献(7)

[1]	GUO W L, ZHU J G.Energy consumption of particle breakage and stress dilatancy in drained shear of rockfill materials[J]. Géotechnique, 2017, 7: 304-308.
[2]	尹振宇, 许强, 胡伟. 考虑颗粒破碎效应的粒状材料本构研究:进展及发展[J]. 岩土工程学报, 2012, 34(12): 2170-2180. (YIN Zhen-yu, XU Qiang, HU Wei.Constitutive relations for granular materials considering particle crushing: Review and development[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(12): 2170-2180. (in Chinese))
[3]	XIAO Y, LIU H, DING X, et al.Influence of particle breakage on critical state line of rockfill material[J]. International Journal of Geomechanics, 2016, 16(1):04015031.
[4]	丁树云, 蔡正银, 凌华. 堆石料的强度与变形特性及临界状态研究[J]. 岩土工程学报, 2010, 32(2): 248-252. (DING Shu-yun, CAI Zheng-yin, LING Hua.Strength and deformation characteristics and critical state of rock fill[J]. Chinese Jounal of Geotechnical Engineering, 2010, 32(2): 248-252. (in Chinese))
[5]	魏匡民, 陈生水, 李国英, 等. 基于状态参数的筑坝粗粒土本构模型[J]. 岩土工程学报, 2016, 38(4): 654-661. (WEI Kuang-min, CHEN Sheng-shui, LI Guo-ying, et al.Constitutive model for coarse-grained dam materials considering state parameter[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(4): 654-661. (in Chinese))
[6]	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): 1357-1364. (CAI Zheng-yin, LI Xiao-mei, HAN Lin, et al.Critical state of rockfill materials considering particle gradation and breakage[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(8): 1357-1364. (in Chinese))
[7]	殷宗泽. 土工原理[M]. 北京: 中国水利水电出版社, 2007. (YIN Zong-ze.Geotechnical principle[M]. Beijing: China Water Conservancy and Hydropower Press, 2007. (in Chinese))