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 。
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.
出处
《铁道工程学报》
EI
2003年第4期59-61,共3页
Journal of Railway Engineering Society
基金
中科院知识创新工程重大项目 (No.KZCX1 - SW- 0 4 )
国家自然科学基金重点大项目 (90 1 0 2 0 0 6)
"973"国家重点基础研究发展规划项目 (2 0 0 2 CB41 2 70 4 )
