| 宽级配砾质土应力路径试验研究 |
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| 引用本文： | 陈志波,朱俊高,刘汉龙.宽级配砾质土应力路径试验研究[J].地震学刊,2010(6):614-619. |
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| 作者姓名： | 陈志波 朱俊高 刘汉龙 |
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| 作者单位： | [1]福州大学环境与资源学院,福州350108 [2]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 |
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| 基金项目： | 水利部公益性行业科研专项（200801133）; 国家杰出青年科学基金项目（50825901）; 福建省教育厅科技项目（JA09027）; 福州大学人才引进基金（XRC-0930）资助 |
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| 摘 要： | 对某土石坝工程的宽级配砾质土进行了三轴等应力比应力路径试验,试验分别模拟了土石坝施工填筑期及蓄水期可能的应力路径,研究了宽级配砾质土在复杂应力状态下的应力应变特性。研究表明,砾质土心墙料在等主应力比和等主应力增量比应力路径作用下,应力应变表现出较好的线性关系;在竣工期,其平均主应力p（或剪应力q）与体应变ε_v及剪应变ε_s的曲线关系都为幂函数形式,ε_v—ε_1、ε_3—ε_1关系均可用线性函数来表示,而在蓄水期,各应力与应变之间的曲线关系则基本上都可以用线性关系来表示。本文研究明确了复杂应力路径下宽级配砾质土的应力应变关系,为建立宽级配砾质土的应力应变本构模型提供了一个重要线索。
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| 关 键 词： | 宽级配砾质土 土石坝 应力路径 三轴试验 应力应变特性 |
Study on Stress Path Tests of Wide Grading Gravelly Soil |
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| CHEN Zhi-bo,ZHU Jun-gao,LIU Han-long.Study on Stress Path Tests of Wide Grading Gravelly Soil[J].Journal of Seismology,2010(6):614-619. |
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| Authors: | CHEN Zhi-bo ZHU Jun-gao LIU Han-long |
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| Institution: | 1.College of Environment and Resources,Fuzhou University,Fuzhou 350108,China;2.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China) |
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| Abstract: | Based on the actual earth-rockfill dam,the constant stress ratio path tests on wide grading gravelly soil,as the material of core wall,were performed,and the stress-strain property of wide grading gravelly soil under complex stress conditions was studied.It showed that wide grading gravelly soil exhibits elastic characteristics whenever under constant stress ratio path or constant stress increment ratio path. During dam construction,all the curve relationships of average principal stress p（or shear stress q） versus volume strainε_v（or shear strainε_s） can be simulated by power function,both the curve relationships ofε_v versusε_1 andε_3 versusε_1 can be simulated by linear function.All the above relationships can be simulated by linear function during dam impounding.The study showed the relationship of stress and strain of wide grading gravelly soil under complex stress path.It＇s an important message for further studying the stress-strain model on wide grading gravelly soil. |
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| Keywords: | wide grading gravelly soil earth-rockfill dam stress path triaxial lest stress-strain property |
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