[1]郭成超,党 鹏,马合木提·依明,等.深厚含土重冰层路基高聚物隔热性能试验[J].郑州大学学报(工学版),2025,46(04):100-106.[doi:10.13705/j.issn.1671-6833.2025.04.004]
　GUO Chengchao,DANG Peng,YIMING Mahemuti,et al.Experimental on Thermal Insulation Capacity of Polymers in Roadbed of Deep Soil-bearing Heavy Ice Layer[J].Journal of Zhengzhou University (Engineering Science),2025,46(04):100-106.[doi:10.13705/j.issn.1671-6833.2025.04.004]
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深厚含土重冰层路基高聚物隔热性能试验()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
46
期数:
2025年04期
页码:
100-106
栏目:
出版日期:
2025-07-10

文章信息/Info

Title:
Experimental on Thermal Insulation Capacity of Polymers in Roadbed of Deep Soil-bearing Heavy Ice Layer
文章编号:
1671-6833(2025)04-0100-07
作者:
郭成超1;  党 鹏2;  马合木提·依明2;  刘建刚2;  吴 栋2;  王 贺3;  曹鼎峰1
1. 中山大学 土木工程学院,广东 珠海 519082;2. 新疆交通建设集团股份有限公司,新疆 乌鲁木齐 830016;3. 西南交通大学 土木工程学院,四川 成都 610031
Author(s):
GUO Chengchao1;  DANG Peng2;  YIMING Mahemuti2;  LIU Jiangang2;  WU Dong2;  WANG He3;  CAO Dingfeng1
1. School of Civil Engineering, Sun Yat-sen University, Zhuhai 519082, China; 2. Xinjiang Communications Construction Group Co. , Ltd. , Urumqi 830016, China; 3. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
关键词:
道路工程;  深厚含土重冰层;  聚氨酯高聚物;  保温隔热结构;  模型试验
Keywords:
roads &;  highways;  deep soil-bearing heavy ice layer;  polyurethane polymer;  thermal insulation structure;  model test
分类号:
TU445
DOI:
10.13705/j.issn.1671-6833.2025.04.004
文献标志码:
A
摘要:
深厚含土重冰层是极限性不良地质,在其上修建路基会面临严重的冻胀和融沉病害,威胁车辆的运行安全。为此探究了将聚氨酯高聚物材料(PU)用作路基的保温隔热层以防止冻融病害。 进行了 PU 的隔热性能试验,分析密度和冻融循环次数对 PU 导热系数的影响。 开展了重冰层冻土路基保温隔热模型试验。 研究了普通路基、单层 PU板路基和双层 PU 板路基在冻融过程中的温度分布特征,定量描述了 PU 的隔热效果。 结果表明:PU 的导热系数与自身密度呈正相关,与冻融循环次数也呈正相关;PU 的密度越低,其导热系数受到冻融循环的影响越大;PU 的密度越高,其隔热性能越能在多次冻融循环中保持稳定;冻结时,普通路基的热通量是单层和双层 PU 板路基的 1. 7 倍,融化时,普通路基的热通量是单层 PU 板路基的 2. 1 倍,双层 PU 板路基的 2. 8 倍;PU 板具有保温隔热能力,可以抬升路基的冻结深度,减少冻胀病害,延长路基的冻结过程,避免融沉病害;双层 PU 板比单层 PU 板表现出更优秀的隔热效果。
Abstract:
The deep soil-bearing heavy ice layer is the extreme adverse geology, on which the construction of roadbed will be exposed to serious frost heave, and thawing and settlement disease, threatening the safe operation of vehicles. Polyurethane polymer ( PU) material was investigated as a thermal insulation layer for roadbeds to prevent freeze-thaw damage. The thermal insulation capability test of PU was conducted to analyze the effect of density and number of freeze-thaw cycles on the thermal conductivity of PU. The model test of thermal insulation of heavy ice layer frozen soil roadbed was carried out. The temperature distribution characteristics of ordinary roadbed, single-layer PU board roadbed and double-layer PU board roadbed during freeze-thaw process were investigated and the thermal insulation effect of PU board was described quantitatively. The results showed that the thermal conductivity of PU was positively correlated with its own density and the number of freeze-thaw cycles. The lower the density of PU, the more its thermal conductivity was affected by freeze-thaw cycles. The higher the density of PU, the more its thermal insulation performance could remain stable in multiple freeze-thaw cycles. The heat flux of ordinary roadbed was 1. 7 times of single-layer PU board roadbed and double-layer PU board roadbed in the freezing process, and 2. 1 times of single-layer PU board roadbed and 2. 8 times of double-layer PU board roadbed in the thawing process. PU board had thermal insulation ability, which could lift the freezing depth of the roadbed and reduce frost heave disease. The existence of PU could also prolong the freezing process of the roadbed and avoid thawing and settlement disease. Double-layer PU board showed better thermal insulation effect than single-layer PU board.

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更新日期/Last Update: 2025-07-13