| 块石层对其下部路基土体温度的影响 |
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| 引用本文： | 孙志忠,马巍.块石层对其下部路基土体温度的影响[J].铁道工程学报,2003(4):59-61. |
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| 作者姓名： | 孙志忠 马巍 |
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| 作者单位： | 中国科学院,寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃,兰州730000 |
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| 基金项目： | 中科院知识创新工程重大项目(No.KZCX1-SW-04);国家自然科学基金重点大项目(90102006);"973"国家重点基础研究发展规划项目(2002CB412704) |
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| 摘 要： | 块石调温路堤是多年冻土区铁路设计施工中采取的一项积极主动保护冻土的措施。本文根据野外观测资料 ,对两种不同粒径块石层下地温状况给予了初步的分析。结果表明 ,暖季粒径为 5～ 8cm的碎石层热屏蔽作用要好于片石层 ,而冷季粒径为 4 0～ 5 0 cm的片石层对流作用要强于碎石层。块石层阴阳面下地温分布具有不对称性 ,表现为阳面下地温高于阴面下的地温
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| 关 键 词： | 块石 地温 热屏蔽 对流 |
| 文章编号： | 1006-2106(2003)04-0059-03 |
| 修稿时间： | 2003年9月2日 |
EFFECTS OF BALLASTS ON TEMPERATURE OF EMBANKMENT IN PERMAFROST REGION |
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| SUN ZHi-zhong,MA Wei State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engineering Research Institiute.EFFECTS OF BALLASTS ON TEMPERATURE OF EMBANKMENT IN PERMAFROST REGION[J].Journal of Railway Engineering Society,2003(4):59-61. |
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| Authors: | SUN ZHi-zhong MA Wei State Key Laboratory of Frozen Soil Engineering Cold and Arid Regions Environmental and Engineering Research Institiute |
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| Abstract: | The ballast embankment is one of the positive measures of protecting frozen soils in construction of Qinghai-Tibet railway. Based on data in field, this paper analysed change of ground temperature under the ballast with two kinds of diameters. In warm season, the action of heat-shield on the ballast with diameters of 5-8 cm is better than that with diameters of 40-50 cm.In cold season, the action of convection is stronger than that with diameters of 5-8 cm. Distribution of ground temperature under the ballast between shade slope and sunshine slope of embankment is asymmetrical, which the ground temperature in sunshine slope is higher than that in shade slope. |
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| Keywords: | ballast ground temperature heat-shield convection |
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