| 循环荷载作用下纤维水泥土动力特性 |
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| 引用本文： | 王闵闵,鹿群,郭少龙,高萌,沈仲涛.循环荷载作用下纤维水泥土动力特性[J].岩土力学,2018,39(5):1753-1760. |
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| 作者姓名： | 王闵闵 鹿群 郭少龙 高萌 沈仲涛 |
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| 作者单位： | 1. 天津城建大学 土木工程学院, 天津 300384；2. 天津城建大学 天津市软土特性与工程环境重点实验室，天津 300384； 3. 中国电力建设集团华东勘测设计研究院有限公司，浙江 杭州 310014；4. 中国水利水电第十二工程局有限公司，浙江 杭州 310004 |
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| 基金项目： | 中国电建集团科技项目（No. SD2013-10）；天津市应用基础与前沿技术研究一般项目（No. 15JCYBJC48900）。 |
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| 摘 要： | 通过动三轴试验，研究水泥土中掺入不同掺量的聚丙烯纤维和玄武岩纤维条件下，其动应力 、动弹性模量 随动应变的变化规律。试验结果表明：水泥土的动强度和动弹性模量与围压、掺入纤维的种类和纤维掺量有关；随着纤维掺量的增多，水泥土的动强度和动弹性模量增大，动变形减小。从滞回曲线和微观的角度分析，掺入玄武岩纤维的水泥土动力性能最好，聚丙烯纤维水泥土次之，素水泥土（无纤维）较弱；最大动弹性模量 随着围压和纤维掺量的增大而增大。玄武岩纤维水泥土在不同围压下的 归一化曲线相互聚拢，表明 对围压的依赖程度降低。
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| 关 键 词： | 循环荷载 玄武岩纤维和聚丙烯纤维 动强度 动弹性模量 动变形 |
| 收稿时间： | 2017-02-20 |
Dynamic behavior of soil with fiber and cement under cyclic loading |
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| WANG Min-min,LU Qun,GUO Shao-long,GAO Meng,SHEN Zhong-tao.Dynamic behavior of soil with fiber and cement under cyclic loading[J].Rock and Soil Mechanics,2018,39(5):1753-1760. |
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| Authors: | WANG Min-min LU Qun GUO Shao-long GAO Meng SHEN Zhong-tao |
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| Institution: | 1. School of Civil Engineering, Tianjin Chengjian University, Tianjin 300384, China; 2. Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin Chengjian University, Tianjin 300384, China; 3. Power Construction Corporation of China, Huadong Engineering Corporation Limited, Hangzhou, Zhejiang 310014, China; 4. Sinohydro Bureau 12 Co., Ltd., Hangzhou, Zhejiang 310014, China |
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| Abstract: | The dynamic stress-strain and dynamic elastic modulus-strain of cemented soil mixed with different amount of polypropylene fiber or the basalt fiber were studied by using the dynamic triaxial apparatus. The results show that the dynamic strength and dynamic elastic modulus of cement soil is in connection with confining pressure, fiber types and fiber contents. With the increase of fiber contents, the dynamic strength and dynamic modulus of cemented soil increase, and the dynamic deformation decreases. The hysteresis curve and the microstructure of cemented soil show that the cement soil containing basalt fiber presents the best dynamic performance . The maximum dynamic elastic modulus increases with the increase of confining pressure and fiber content. The normalized curves of cemented soil mixed with basalt fiber under different confining pressures gather with each other, so the dependency on the confining pressure is weakened. |
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| Keywords: | cyclic loading basalt fiber and polypropylene fiber dynamic strength dynamic elastic modulus dynamic deformation |
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