| 摘要: |
| 在单向冻结条件下对饱和粉质黏土试件进行了6种工况下的室内冻胀试验研究.结果表明：冷端温度、压实度、温度梯度、上覆压力和补水条件是影响土体冻胀变形的关键因素；温度梯度、冷端温度和上覆压力与土体冻胀变形呈反比，压实度与土体冻胀变形呈正比；冻胀率是表征土体冻胀敏感性的关键指标，与材料参数和冻结条件有关.最后，基于试验研究提出了用于指导工程应用的路基冻胀病害防治措施. |
| 关键词: 季节性冻土区 粉质黏土 冻胀变形 温度场 冻胀速率 冻胀率 冻胀控制 |
| DOI：103969/j.issn1007 9629201605024 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51578200，51408163）；黑龙江省自然科学基金重点项目（ZD201218）；福建省自然科学基金（15175024）；福州大学科研启动基金项目（510406） |
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| Experimental Study on Frost Heave of Saturated Silty Clay under Single Side Freezing |
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MA Hongyan, ZHANG Feng, FENG Decheng, TANG Kangwei
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School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
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| Abstract: |
| Experimental study on frost heave of saturated silty clay under six conditions was conducted. The results show that cooling temperature, compactness, temperature gradient, overburden pressure and water supply condition are the key factors for frost heave. The temperature gradient, cooling temperature and overburden pressure are inversely proportional to frost heave. The compactness is proportional to frost heave. The frost heave ratio is an important index to characterize frost susceptibility, which is related to material parameters and freezing conditions. Finally, control measures of frost heave used to guide engineering practice is proposed base on the experimental study. |
| Key words: seasonal frozen region silty clay frost heave temperature field frost heave rate frost heave ratio frost heave control |
