| K0固结条件下粗粒土变形及强度特性研究 |
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| 引用本文： | 褚福永,朱俊高,王平,杜青,温彦锋.K0固结条件下粗粒土变形及强度特性研究[J].岩土力学,2012,33(6):1625-1630. |
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| 作者姓名： | 褚福永 朱俊高 王平 杜青 温彦锋 |
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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，南京 210098；2. 丽水学院 土木工程学系，浙江 丽水，323000；3. 中国水电顾问集团成都勘测设计研究院，成都 610072；4. 江苏省交通规划设计院股份有限公司，南京 210098；5. 中国水利水电科学研究院岩土工程研究所，北京 100038 |
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| 基金项目： | 水利部公益性行业科研专项“高心墙堆石坝安全性评价技术研究”(No.200801133);国家自然科学基金(No.50809023);国家杰出青年科学基金(No.50825901) |
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| 摘 要： | 采用大三轴剪切仪对不同相对密度的双江口心墙坝覆盖层料，进行了K0固结及各向等压固结条件下的排水剪切试验，探讨了K0固结过程中粗粒土的变形特性。将K0固结与等压固结条件下的排水剪切试验的结果进行了对比分析。结果表明，K0固结加载阶段，平均主应力p与体应变? v之间、剪应力q剪应变? s之间的关系都可用幂函数形式表示。K0固结稳压阶段，? a-t关系呈指数关系。与等压固结试验相比，K0固结试样的排水剪强度略大。K0固结排水剪试验所得到的初始弹性模量Ei、初始泊松比vi均大于等压固结排水剪试验相同应力条件下的弹性模量、泊松比；且K0固结条件下试样的剪胀性也较为明显。
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| 关 键 词： | K0固结 大三轴 相对密度 粗粒土 |
| 收稿时间： | 2010-12-24 |
Study of deformation and strength characteristics of coarse grained soil under K0-consolidation condition |
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| CHU Fu-yong
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ZHU Jun-gao
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WANG Ping
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DU Qing
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WEN Yan-feng.Study of deformation and strength characteristics of coarse grained soil under K0-consolidation condition[J].Rock and Soil Mechanics,2012,33(6):1625-1630. |
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| Authors: | CHU Fu-yong ZHU Jun-gao WANG Ping DU Qing WEN Yan-feng |
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| Institution: | 1.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;2.School of Civil Engineering,Lishui University,Lishui,Zhejiang 323000,China;3.Hydro-China Chengdu Design and Research Institute,Chengdu 610072,China;4.Jiangsu Provincial Communications Planning and Design Institute,Nanjing 210098,China;5.Department of Geotechnical Engineering,China Institute of Water Resources and Hydropower Research,Beijing 100038,China) |
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| Abstract: | Using large-scale shearing device,K0 consolidated-drained triaxial test and isotropically consolidated-drained triaxial test under different confining pressures are performed for three relative density overburden material of Shuangjiangkou earth dam.The behaviour of coarse-grained soil under K0-consolidation is investigated.The test results from K0 consolidated-drained tests are compared with those from isotropically consolidated-drained tests.The results show that the relationship between mean principal stress and volumetric strain and between deviatoric stress and deviatoric strain during the K0-consolidation can be fitted with power function.In the stage with steady pressure after K0-consolidation,the strain-time curve can be fitted with exponential function.The strength of K0 consolidated-drained triaxial shear test is slight greater than that of isotropically consolidated-drained test.The initial elastic modulus Eiand Poisson’s ratio vi obtained from K0 consolidated-drained triaxial test is larger than that from isotropically consolidated-drained test.The dilatancy K0-consolidated sample is more evident. |
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| Keywords: | K0-consolidation condition large-scale triaxial test relative density coarse grained soil |
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