文献类型：期刊文献

中文题名：掺微胶囊相变材料粗粒土的冻胀试验研究

英文题名：Experimental study on frost heaving of coarse grained soil mixed with microencapsulated phase change materials

作者：孙斌祥[1,2];陈加集[1,2];潘建光[1,2]

机构：[1]绍兴文理学院元培学院,浙江绍兴312000;[2]绍兴文理学院土木工程学院,浙江绍兴312000

年份：2023

卷号：45

期号：1

起止页码：178

中文期刊名：冰川冻土

外文期刊名：Journal of Glaciology and Geocryology

收录：CSTPCD、、CSCD2023_2024、北大核心、CSCD、北大核心2020

基金：国家自然科学基金项目(41572305)资助。

语种：中文

中文关键词：粗粒土;冻胀试验;微胶囊相变材料;路基冻胀

外文关键词：coarse grained soil;frost heaving test;microencapsulated phase change materials;subgrade frost heave

中文摘要：微胶囊相变材料(PCM)是一种可以通过转变形态而影响温度变化的材料。为了研究相关材料对路基土冻胀的影响,对普通粗粒土及掺入不同含量(5%、8%、10%)微胶囊相变材料粗粒土进行单向冻胀试验。结果表明:与普通粗粒土相比,掺入微胶囊相变材料能延缓粗粒土的温度变化,且土体具有较高的温度终值;同时,能对土样冻结深度的发展产生影响,降低粗粒土最大冻结深度值;也能减弱粗粒土的水分迁移能力,土体的补水量以及最终含水率均有不同程度的减小;掺入微胶囊相变材料能抑制粗粒土冻胀的发展,冻胀量以及冻胀率均得到一定程度的减小。比较掺入5%、8%和10%含量微胶囊相变材料粗粒土冻胀试验结果发现,更高含量的微胶囊相变材料在影响粗粒土的温度、水分以及冻胀等方面表现出更佳的改善效果。因此,在冻土区高铁路基土中掺入微胶囊相变材料,对改善路基冻胀的发生具有一定的工程意义。

外文摘要：Microencapsulated phase change material(PCM) is a material that can affect temperature changes by transforming its morphology. In order to study the effect of these materials on frost heave of subgrade soils, unidirectional frost heave tests were carried out on the ordinary coarse-grained soils and microencapsulated PCM coarse-grained soils mixed with different contents of 5%, 8% and 10%. The results show that compared with the ordinary coarse-grained soils, the temperature changes of the coarse-grained soil mixed the microencapsulated PCM can be delayed, and the final temperature of these soils also shows a higher value. Meanwhile, it can affect the development of the soil sample freezing depth and reduce the maximum freezing depth value of microencapsulated PCM coarse-grained soils. The water migration ability of coarse-grained soils are weaken, thus resulting in reducing the water replenishment amount and the final water content of the soil samples. The incorporation of microencapsulated PCM can mitigate the development of coarse-grained soil frost heave, and the frost heave amount and frost heave rate were both reduced to a certain extent. Comparing the frost heave test results of coarse-grained soil with 5%, 8% and 10% contents of microencapsulated PCM, it was found that the higher microencapsulated PCM content may show better improvement effects in terms of affecting the temperature, moisture and frost heave of coarse-grained soils. Therefore, the incorporation of microencapsulated PCM into the foundation soil of high-speed railway in cold regions has certain engineering significance for improving the occurrence of subgrade frost heave.