多年冻土区路基用压缩式制冷装置的开发与试验  

Development and experiment on a new compression refrigeration apparatus for subgrade engineering in permafrost regions

作　　者：胡田飞 刘建坤 辛文绍 HU Tianfei;LIU Jiankun;XIN Wenshao(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang 050043,China;School of Civil Engineering,Sun Yat-sen University,Guangzhou 510275,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,河北石家庄050043 [3]中山大学土木工程学院,广东广州510275 [4]北京交通大学土木建筑工程学院,北京100044

出　　处：《铁道科学与工程学报》2020年第2期492-499,共8页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(41731281)

摘　　要：针对中国多年冻土区广泛面临的冻土退化和路基热稳定性问题,基于压缩式制冷技术,提出一种新型多年冻土保护装置。首先,分析压缩式制冷技术面向多年冻土区路基工程的适用性。然后,设计与制作一款路基专用制冷装置-自动化压缩式制冷管,包括制冷单元和自动化控制单元。制冷单元为压缩机、节流器、蒸发器和冷凝器顺次连接而成的闭合循环回路,自动化控制单元为基于位式控制原理的微电脑控制器。装置制冷性能试验表明,制冷温度在正温环境中也一直保持在0℃以下,且可以自动地维持在-5,-10和-15℃等恒定范围内,制冷系数随着制冷温度的升高而增大。压缩式制冷管具有季节匹配性好和自动化程度高的技术优势,可以为多年冻土区路基工程提供一种有效的冻土退化防治方法。To improve the permafrost degradation and thermal stability problems of subgrade engineering, the compression refrigeration technology was introduced and a new type of permafrost protection method was proposed. The suitability of compression refrigeration technology for subgrade engineering was initially analyzed. A new type of refrigeration apparatus for subgrade engineering, named automatic compression refrigeration tube, was then designed and manufactured. The apparatus mainly includes a refrigeration unit and an automatic controller unit. The refrigeration unit consists of a compressor, capillary tube, evaporator and condenser, and they are connected sequentially to be a closed circuit. The automatic controller unit is an electrical regulator with a step-by-step control method in principle. Finally, performance tests show that the apparatus can work in any season, the refrigeration temperature can maintain below 0 ℃ even in a warm environment, and it can also be controlled within a fixed range of-5,-10 or -15 ℃ automatically. The refrigeration coefficient is more favorable when the designed refrigeration temperature is higher. The proposed compressed refrigeration tube is of a good seasonal match and automatic operation ability, and it is a more advanced method for subgrade engineering in permafrost regions.

关 键 词：多年冻土退化 路基 制冷技术 结构型式 部件选型 性能试验 

分 类 号：TU43[建筑科学—岩土工程]