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| 粉煤灰土冻融循环后的动力特性试验研究 | |
| 引用本文： | 魏海斌,刘寒冰,高一平,方瑛,李长雨.粉煤灰土冻融循环后的动力特性试验研究[J].岩土力学,2007,28(5):1005-1008. |
| 作者姓名： | 魏海斌 刘寒冰 高一平 方瑛 李长雨 |
| 作者单位： | 1. 吉林大学,交通学院,长春,130022;吉林大学,应用技术学院,长春,130022 2. 吉林大学,交通学院,长春,130022 3. 吉林大学,测试中心,长春,130022 |
| 基金项目： | 高等学校博士学科点专项科研项目;吉林大学校科研和教改项目 |
| 摘 要： | 为研究粉煤灰土作为路基填料的可行性，把易液化的粉煤灰和易冻胀的粉质黏土按干重1：2混合，通过冻融循环后的动三轴试验，研究了粉煤灰土的动力特性，得出了动强度和循环荷载次数及冻融循环次数的数量关系，以及动模量与动应变及冻融循环次数的关系曲线。研究表明，粉煤灰土经过3次冻融后的动力性能指标优于粉质黏土，具有良好的抗冻性及稳定性，可以作为季冻区路基填料。 |
| 关 键 词： | 粉煤灰土 冻融循环 动强度 动模量 |
| 文章编号： | 1000-7598-（2007）05-1005-04 |
| 收稿时间： | 2005-09-19 |
| 修稿时间： | 2005-09-19 |
Experimental research on dynamic properties of fly ash soil subjected to freeze-thaw cycles |
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| WEI Hai-bin,LIU Han-bing,GAO Yi-ping,FANG Ying,LI Chang-yu.Experimental research on dynamic properties of fly ash soil subjected to freeze-thaw cycles[J].Rock and Soil Mechanics,2007,28(5):1005-1008. | |
| Authors: | WEI Hai-bin LIU Han-bing GAO Yi-ping FANG Ying LI Chang-yu |
| Institution: | 1. Transportation College, Jilin University, Changchun 130022, China; 2. Applied Technology College, Jilin University, Changchun 130022, China; 3. Center for testing, Jilin University, Changchun 130022, China |
| Abstract: | Tests on composite material from easy liquefaction fly ash and easy freezing silty clay according to dry weight 1:2 are conducted to investigate the dynamic properties of fly ash soils for roadbed filling.The dynamic triaxial tests are made on the two kinds of soils after freeze-thaw cycles.The variation law between the dynamic strength and the number of cycles of dynamic loading and the number of freeze-thaw cycles is obtained.The relationship curves of the dynamic stress-strain and the dynamic elastic modulus-elastic strain and the curve of the dynamic modulus and the number of freeze-thaw cycles are also given.The research shows that the dynamic properties of fly ash soils(1:2) is better than silty clay subjected to freeze-thaw cycles.After 3 cycles of freezing and thawing,its dynamic strength and dynamic modulus reach stability.It has superiority as roadbed filling. |
| Keywords: | fly ash soils freeze-thaw cycles dynamic strength dynamic modulus |
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