经PS加固前后遗址土体的热传导率与强度关系研究

发布时间：2018-03-09 22:28

本文选题：土力学　切入点：遗址土　出处：《岩石力学与工程学报》2016年S1期 　论文类型：期刊论文

【摘要】：为了探索利用红外热像检测技术(通过热传导率的差异)对PS加固效果的评价方法,利用新疆交河故城遗址现场的扰动土制成土样,并经过不同浓度的PS加固,测定其力学强度和热传导率。实验结果显示,经PS加固后的土样,其力学强度增大且热传导率降低。在相同PS用量条件下,土样力学强度随PS浓度增加而增大;热传导率随PS浓度增加而减小。通过对实验数据回归分析,热传导率与强度具有良好的线性负相关关系。最后还探讨了PS作用下,土体热传导率的变化机制,从土体的微观结构角度阐述热传导率与强度之间的相关性。研究结果表明热传导率可用于评价PS的加固效果,这为研究PS加固效果的无损检测提供了一条途径。
[Abstract]:In order to explore the evaluation method of PS reinforcement effect by using infrared thermal image detection technology (through the difference of thermal conductivity), soil samples were made from disturbed soil from the site of Jiaohe City site in Xinjiang, and were strengthened with different concentrations of PS. The experimental results show that the mechanical strength of the soil reinforced by PS increases and the thermal conductivity decreases. Under the same PS content, the mechanical strength of the soil increases with the increase of PS concentration. The thermal conductivity decreases with the increase of PS concentration. By regression analysis of experimental data, it is found that there is a good linear negative correlation between heat conductivity and strength. Finally, the variation mechanism of soil thermal conductivity under PS action is discussed. From the point of view of microstructure of soil mass, the correlation between heat conductivity and strength is expounded. The results show that heat conductivity can be used to evaluate the reinforcement effect of PS, which provides a way to study the nondestructive testing of PS reinforcement effect.
【作者单位】：上海交通大学土木工程系;上海师范大学建筑工程学院;国家古代壁画保护工程技术研究中心保护研究所;
【基金】：国家自然科学基金资助项目(41272319) 国家古代壁画保护工程技术研究中心资助项目(20111202)~~
【分类号】：TU43

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