经PS加固前后遗址土体的热传导率与强度关系研究

doi:10.13722/j.cnki.jrme.2014.1504

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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。

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	欧阳先庚1
	张得煊2
	王旭东3
	郭青林3

关键词 ：土力学, 遗址土, PS材料, 热传导率, 强度, 无损检测

Abstract：In order to explore the evaluating method of infrared imaging detection technique(differences in thermal conductivity) for potassium silicate(PS) reinforced earthen ruins soil，adopting the disturbed soil collected from Jiaohe ruins to make soil models，which are reinforced by different concentration of PS，the mechanical strength and thermal conductivity of soil models were determined. It is shown that mechanical strength increase and thermal conductivity reduce for PS reinforced soil. Under the condition of the same dosage of PS，the larger the concentration of PS is，the higher the mechanical strength of soil is，but the smaller the thermal conductivity of soil is. Through analyzing the experiment data regression，thermal conductivity and strength has a good linear negative relationship. Finally，explore the alterative mechanism of thermal conductivity of soil in the effect of PS，describe the relationship between thermal conductivity and strength in the from microstructure of soil. The relationship above shows that thermal conductivity can be used to evaluate the reinforcing effects of earthen sites，which provides a possible method to carry out the non-destructive inspection of the effect for PS reinforced earthen ruins soil.

Key words： soil mechanics ruins soil potassium silicate(PS) materials thermal conductivity strength non- destructive inspection

引用本文:

欧阳先庚1，张得煊2，王旭东3，郭青林3. 经PS加固前后遗址土体的热传导率与强度关系研究[J]. 岩石力学与工程学报, 2016, 35(S1): 3268-3273.
OUYANG Xiangeng1，ZHANG Dexuan2，WANG Xudong3，GUO Qinglin3. Relationship study of thermal conductivity and strength for PS reinforced earthen sites. , 2016, 35(S1): 3268-3273.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.1504 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS1/3268

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