| 坝体填筑料压缩特性及影响因素分析 |
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| 引用本文： | 张兵,高玉峰,刘伟,艾艳梅.坝体填筑料压缩特性及影响因素分析[J].岩土力学,2009,30(3):741-745. |
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| 作者姓名： | 张兵 高玉峰 刘伟 艾艳梅 |
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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.河海大学 岩土工程科学研究所，南京 210098； 3.黄河勘测规划设计有限公司，郑州 450003；4. 河南省水利勘测设计研究有限公司，郑州 450008；5.河南卓越工程管理有限公司，郑州 450008 |
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| 基金项目： | 国家自然科学基金重大项目，国家自然科学基金委员会、二滩水电开发有限责任公司雅砻江水电开发联合研究基金重点项目，江苏省青蓝工程资助项目 |
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| 摘 要： | 堆石料的压缩性直接关系工程的安全问题，对某一抽水蓄能电站坝体填筑料开展多组大型侧限压缩试验，结果表明，堆石料的压缩模量较大、压缩指数很小。只有在应力超过颗粒破碎应力以后堆石料压缩曲线才会发生较大程度的下降，且认为颗粒破碎应力是堆石料发生弹塑性变形的转折点，对于不同初始孔隙比的同一种堆石料，在极高的应力状态下它们的压缩曲线会聚到唯一的极限压缩曲线LCC。压缩曲线中堆石料的卸荷回弹量非常小，表明其是弹性变形。不论何种加载路径材料的初始级配决定了堆石料的最终压缩状态，且随着母岩强度的增加、初始孔隙比或者泥岩含量的减小堆石料的压缩性减小。
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| 关 键 词： | 压缩试验 孔隙比 回弹 岩性 母岩 泥岩 颗粒破碎 |
| 收稿时间： | 2007-04-06 |
Research on compressibility of rockfill materials for dams and analysis of influencing factors |
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| ZHANG Bing,GAO Yu-feng,LIU Wei,AI Yan-mei.Research on compressibility of rockfill materials for dams and analysis of influencing factors[J].Rock and Soil Mechanics,2009,30(3):741-745. |
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| Authors: | ZHANG Bing GAO Yu-feng LIU Wei AI Yan-mei |
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| Institution: | 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China; 3.Yellow River Engineering Consulting Co., Ltd., Zhengzhou 450003, China; 4. Henan Water & Power Engineering Consuluting Co., Ltd., Zhengzhou 450008, China; 5. Henan Pmking Project Management Co., Ltd., Zhengzhou 450008, China |
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| Abstract: | The compressibility of rockfill materials is directly related to the safety and stability of projects, therefore, a good many groups of large scale uniaxial-confined compression tests are carried out on the rockfill materials for a certain pumped storage power station. The experiment results show that the compressive moduli of rockfill materials are higher; and the compressive indexes are much lower. More compression deformation will happen when the stress on the internal grain exceeds the value sufficient for particle breakage; and this stress is regarded as the transitional point of elastoplastic deformation. Specimens of a given rockfill materials, which are compressed from different initial void ratios, converge on a unique limiting compression curve(LCC). Moreover, the unloading rebound deformation of rockfill materials is elastic deformation because the deformation quantity is very small and linear. The compression state of rockfill materials is determined by the gradation no matter what the loading paths are, and the compressibility will decrease while the strength of parent rock increases or the initial void ratio and the content of mudstone decrease. |
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| Keywords: | compression test void ratio rebound lithology parent rock mudstone particle breakage |
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