Frost-resistant embankments with a novel ground source heat pump system  

作　　者：TianFei Hu Li Wang TengFei Wang TieCheng Sun TianFeng Li 

机构地区：[1]State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China [2]School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China [3]Key Laboratory of High-Speed Railway Engineering,Southwest Jiaotong University,Ministry of Education,Chengdu,Sichuan 610031,China

出　　处：《Research in Cold and Arid Regions》2024年第6期292-301,共10页寒旱区科学(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.42001059,52178340);the Natural Science Foundation of Hebei Province,China(Grant No.E2020210044);the Key Laboratory of Mechanical Behavior Evolution and Control of Traffic Engineering Structures in Hebei(Grant No.SZ 2022-03);the Overseas Expertise Introduction Project for Discipline Innovation("111 Project",Grant No.B21011).

摘　　要：This study introduces a novel artificial heating technique aimed at addressing frost heave issues in embankments on frozen ground,offering a sustainable solution.Initial evaluations assessed various heating systems,including boilers,heat pumps,solar heaters,and electric heaters,focusing on their thermal performance and applicability.The study subsequently designed and implemented a direct-expansion ground source heat pump(DX-GSHP)system as the primary heat source for embankment warming.Rigorous testing confirmed the DX-GSHP system's ability to maintain a heat-supply temperature above 40℃ and a heat-absorption temperature below -3.5℃,effectively extracting geothermal energy for transfer to the topsoil layers.With a demonstrated coefficient of performance(COP)of 3.49,the DX-GSHP system not only proves its energy efficiency but also suggests a potential role in reducing the strain on electricity supply systems.Installation of DX-GSHPs,with heating capacities ranging from 1.0 to 2.0 kW and spaced at intervals of 2.0-4.0 m,provides a rapid thermal response to frost heave in singletrack railway embankments,thereby potentially mitigating frost-induced damage in cold climate regions.

关 键 词：Frost heave EMBANKMENT Artificial heating Ground source heat pump Coefficient of performance 

分 类 号：U21[交通运输工程—道路与铁道工程]