| 粗粒土变形与强度特性大三轴试验研究 |
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| 引用本文： | 褚福永,朱俊高,王观琪,刘汉龙. 粗粒土变形与强度特性大三轴试验研究[J]. 山东农业大学学报(自然科学版), 2011, 42(4): 572-578 |
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| 作者姓名： | 褚福永 朱俊高 王观琪 刘汉龙 |
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| 作者单位： | 1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098;河海大学岩土工程研究所,江苏南京210098
2. 成都勘测设计研究院坝工处,四川成都,610072 |
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| 基金项目： | 水利部公益性行业科研专项(200801133)高心墙堆石坝安全性评价技术研究; 国家杰出青年科学基金(50825901); 国家自然科学基金(50809023) |
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| 摘 要： | 对两种不同密度的某粗粒土进行了大三轴固结排水剪切试验,分析了粗粒土的应力-应变关系、强度及变形特性,初步探讨了反映剪胀程度的剪胀因子与三者之间的关系,对现有的一些适用于粗粒土的经验公式进行了验证。结果表明:粗粒土低围压下表现出应变软化和剪胀、高围压下表现出应变硬化和剪缩;高围压下最大主应力比和剪胀因子近似呈直线关系;粗粒土的抗剪强度包络线呈非线性,内摩擦角随剪胀因子的增加大致呈线性增加趋势,说明剪胀性的发生会增加粗粒土的抗剪强度;抛物线表达式能较合理地反映侧向应变与轴向应变之间的关系。
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| 关 键 词： | 粗粒土 大型三轴试验 变形与强度特性 剪胀因子 |
LARGE-SCALE TRIAXIAL TEST STUDY ON DEFORMATION AND STRENGTH CHARACTERISTICS OF COARSE GRAINED MATERIAL |
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| CHU Fu-yong,ZHU Jun-gao,WANG Guan-qi,LIU Han-long. LARGE-SCALE TRIAXIAL TEST STUDY ON DEFORMATION AND STRENGTH CHARACTERISTICS OF COARSE GRAINED MATERIAL[J]. Journal of Shandong Agricultural University, 2011, 42(4): 572-578 |
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| Authors: | CHU Fu-yong ZHU Jun-gao WANG Guan-qi LIU Han-long |
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| Affiliation: | CHU Fu-yong1,2,ZHU Jun-gao1,WANG Guan-qi3,LIU Han-long1,2(1.Key Laboratory of Ministry of Education for Geo-mechanics and Embankment Engineering,Nanjing 210098,China,2.Gotechnical Research Institute,Hohai University,3.Chengdu Hydroelectric Investigation and Design Institute,Chendu 610072,China) |
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| Abstract: | The triaxial consolidated drained shear test was implemented for the coarse-grained soil of the two kind densities.Based on the test,the stress-strain relationship,strength and deformation property with coarse-grained soil were analyzed,and meanwhile,the influence of shear dilatancy factor which reflects the degree of dilatancy are explored and the versatility of the current empirical formulas was verified.The results indicate: the coarse-grained soil shows strain softening and dilatancy under low confining... |
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| Keywords: | Coarse-grained materials large-scale triaxial test characteristics of deformation and strength shear dilatancy factor |
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