| 冻融作用对饱和粉质黏土抗剪性能的影响 |
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| 引用本文： | 于琳琳,徐学燕,邱明国,闫自利,李鹏飞.冻融作用对饱和粉质黏土抗剪性能的影响[J].岩土力学,2010,31(8):2448-2452. |
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| 作者姓名： | 于琳琳 徐学燕 邱明国 闫自利 李鹏飞 |
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| 作者单位： | 1. 哈尔滨工业大学土木工程学院,哈尔滨,150090
2. 中交隧道局(西安)第二工程有限公司,西安,710075 |
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| 基金项目： | 铁道部科技开发计划项目，国家自然科学基金 |
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| 摘 要： | 为研究季节冻土地区冻融作用对道路边坡土体抗剪性能的影响规律,在不同冻结和融化温度、不同冻融循环次数、开放和封闭体系条件下对冻融饱和原状粉黏土试样进行了不固结、不排水剪切试验。试验结果表明:饱和原状粉质黏土冻融后,黏聚力降低,内摩擦角增大,冻结温度越低,冻融作用对黏聚力和内摩擦角的影响越小,随着冻融循环次数的增加,5～7次冻结循环后二者的变化逐渐趋于稳定。水分补给会强化冻融作用对试验土抗剪性能的影响;融化温度对试验土的抗剪性能影响很小。
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| 关 键 词： | 冻融循环 饱和原状粉质黏土 抗剪性能 冻结和融化温度 |
| 收稿时间： | 2009-02-10 |
Influnce of freeze-thaw on shear strength properties of saturated silty clay |
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| YU Lin-lin,XU Xue-yan,QIU Ming-guo,YAN Zi-li,LI Peng-fei.Influnce of freeze-thaw on shear strength properties of saturated silty clay[J].Rock and Soil Mechanics,2010,31(8):2448-2452. |
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| Authors: | YU Lin-lin XU Xue-yan QIU Ming-guo YAN Zi-li LI Peng-fei |
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| Institution: | 1.School of Civil Engineering，Harbin Institute of Technology，Harbin 150090，China;2.No.2 Engineering Co. Ltd., CCCC Tunnel Engineering Co. Ltd.，(Xi’an), Xi’an 710075, China |
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| Abstract: | In order to reveal the regular influence of freezing-thawing cycle on shearing strength properties of road slope soil in seasonally frozen area, unconsolidated-undrained test was carried out on saturated undisturbed silty clay under different experimental conditions such as freezing and thawing temperature, freezing-thawing cycle index and open or closed system. The test results indicate that after freezing-thawing, cohesion decreases, but internal frictional angle increases; the lower freezing temperature is, the less influence of freezing-thawing cycle on cohesion and internal frictional angle is. As freezing-thawing cycle number increases, after 5-7times, the changes of shearing strength properties gradually become stable. Water supply can reinforce the influence of freezing-thawing on C and ; thawing temperature has a slight effect on the shearing strength properties of saturated undisturbed silty clay. |
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| Keywords: | freezing-thawing cycle saturated undisturbed silty clay shearing strength properties freezing and thawing temperature |
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