文章基本信息

标题：Evaluation of soil insulation effect on thermal behavior of drilled shafts as mass concrete
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作者：Sangyoung Han ; Sanghyun Chun ; Kukjoo Kim 等
期刊名称：Cogent Engineering
电子版ISSN：2331-1916
出版年度：2018
卷号：5
期号：1
页码：1468202
DOI：10.1080/23311916.2018.1468202
语种：English
出版社：Taylor and Francis Ltd
摘要：Abstract This study focused on investigating the early-age thermal behavior of drilled shafts under different surrounding soil’s thermal properties. Four 1.8 m (6 ft) diameter drilled shafts were constructed using two different concrete mixes and two different soil conditions. A finite element (FE) model was developed to estimate the temperature development of drilled shafts at early-age and validated using temperatures measured from full-scale drilled shafts constructed in the field. The validated analytical model was then used to perform a parametric analysis to evaluate the effects of the surrounding soils at different moisture conditions on change in thermal behavior of drilled shafts at early-age. Results indicated that the FE model developed was capable of accurately predicting temperature development of drilled shafts at early-age. A drier surrounding soil (i.e., gravimetric moisture content of 0% through 6%) was able to serve as a better insulating material that leads to reduced temperature difference in the drilled shafts. Also, it was identified the use of high-volume fly ash concrete mix in conjunction with relatively low heat of hydration can reduce the temperature difference in the drilled shaft.
关键词：mass concrete ; drilled shaft ; soil’s thermal properties ; moisture content ; maximum temperature difference