| 南方地区城市生活垃圾导热系数的试验研究 |
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| 引用本文： | 何春木,邱战洪,陈合龙,熊浩,朱兵见,刘子振.南方地区城市生活垃圾导热系数的试验研究[J].岩土力学,2015,36(4):1057-1062. |
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| 作者姓名： | 何春木 邱战洪 陈合龙 熊浩 朱兵见 刘子振 |
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| 作者单位： | 1. 台州学院建筑工程学院,浙江台州,318000
2. 中国科学院武汉岩土力学研究所,湖北武汉,430071 |
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| 基金项目： | 国家自然科学基金(No.51108293) |
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| 摘 要： | 温度场对垃圾填埋场的衬垫系统、气体运移和垃圾土工程特性等存在显著影响,导热系数是研究填埋场内温度场的重要参数。以台州卢岙里垃圾填埋场为研究对象,采用DRCD-3030型智能化导热系数测定仪,测定了不同孔隙率和含水率条件下的垃圾导热系数。试验中,垃圾试样的含水率分别取0%、5%、10%、15%、20%、25%、30%、35%、40%、45%和50%;垃圾的孔隙率分别取77.8%、75.0%、71.4%和66.7%。试验结果表明:干垃圾导热系数较小,仅为标准状态空气导热系数的2.5~3.5倍,并随孔隙率的增大而减小;非饱和垃圾的导热系数随含水率的增加而增大,当含水率相等时,孔隙率越小,垃圾的导热系数越大。根据垃圾导热系数的实测数据,利用修正几何加权平均模型和线性拟合技术,建立了垃圾导热系数的计算公式,可以为垃圾填埋场温度场的研究提供重要参考。
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| 关 键 词： | 城市垃圾 导热系数 孔隙率 含水率 |
| 收稿时间： | 2014-07-22 |
Experimental determination of the thermal conductivity coefficients of municipal solid wastes in South China |
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| HE Chun-mu
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QIU Zhan-hong
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CHEN He-long
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XIONG Hao
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ZHU Bing-jian
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LIU Zi-zhen.Experimental determination of the thermal conductivity coefficients of municipal solid wastes in South China[J].Rock and Soil Mechanics,2015,36(4):1057-1062. |
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| Authors: | HE Chun-mu QIU Zhan-hong CHEN He-long XIONG Hao ZHU Bing-jian LIU Zi-zhen |
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| Institution: | 1. College of Architecture and Civil Engineering, Taizhou University, Taizhou, Zhejiang 318000, China; 2. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China |
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| Abstract: | The temperature field can significantly influence the performance of the liner system, the gas migration process and the mechanical behavior of the municipal solid waste (MSW) in a landfill. The thermal conductivity coefficient is the important parameter for determining the temperature field in the landfill site. Using DRCD - 3030 type intelligent thermal conductivity tester, the thermal conductivity coefficients of the MSW sampled from Taizhou Luaoli landfill are determined at different water contents and porosities. In the experiment, the water contents of the samples are targeted to 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% and 50%, respectively, and the porosities are targeted to 77.8%, 75.0%, 71.4% and 66.7%, respectively. The experimental results show that the thermal conductivity coefficient of the dry MSW is generally small, about 2.5-3.5 times that of the air in standard state, and it decreases as the porosity increase. The thermal conductivity coefficient of the unsaturated MSW increases with the increase of water content. At the same water content, the smaller the porosity of MSW, the greater thermal conductivity coefficient. Based on the experimental data, a formulation is developed, using the weighted geometric mean method and the linear curve-fitting method, to calculate the thermal conductivity coefficient, which can provide an important tool for determining the temperature field in a landfill. |
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| Keywords: | municipal solid waste (MSW) thermal conductivity coefficient porosity water content |
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