摘要
以保持多年冻土地基维持低温、提高多年冻土上限为需求,提出了基于DeST(designer’s simulation toolkit)软件的多年冻土路基计算模型,开展青藏铁路多年冻土地基的冷量需求研究。通过对比实测地温、理论计算的冷负荷与模型计算结果,验证了DeST计算模型的准确性。通过DeST模型的计算结果揭示青藏铁路多年冻土地基冷负荷的时序特性并评估不同线路走向对冷负荷的影响。研究结果表明:青藏铁路多年冻土地基的冷负荷自5月中旬开始增加,10月中旬达到峰值;南北走向的线路因受光照影响较大,冷负荷略高于东西走向。研究成果为热棒在青藏铁路的布置间距及其他新型主动制冷技术的冷量匹配设计方案提供了参考依据。
With the requirement of maintaining the low temperatures of permafrost foundation and increase the upper limit of permafrost,a calculation model for permafrost subgrade based on DeST(designer’s simulation toolkit)software was proposed to conduct research on the cooling demand of permafrost foundation on Qinghai-Xizang railway.The accuracy of the DeST calculation model was verified by comparing measured ground temperature data,theoretically calculated cooling load values,and model calculation results.The time series characteristics of the cooling load on the permafrost foundation of Qinghai-Xizang railway were revealed through the calculation results of the DeST model,and the impact of different route directions on the cooling load was evaluated.The research shows that the cooling load on the permafrost foundation of Qinghai-Xizang railway increases from mid May and reaches its peak in mid October,and is generally negatively correlated with temperature.The north-south route is significantly affected by sunlight,resulting in slightly higher cooling loads than the east-west route.The research results provide a reference for the layout spacing of thermoprobes on Qinghai-Xizang railway and the matching design scheme of cooling capacity for other new active cooling technologies.
作者
王瑜鑫
蔡德钩
闫宏业
朱丙龙
刘晓贺
WANG Yuxin;CAI Degou;YAN Hongye;ZHU Binglong;LIU Xiaohe(Postgraduate Department,China Academy of Railway Sciences,Beijing 100081,China;Railway Engineering Research Institute,CARS,Beijing 100081,China;State Key Laboratory for Track System of High-speed Railway,Beijing 100081,China)
出处
《铁道建筑》
北大核心
2025年第5期109-114,共6页
Railway Engineering
基金
国家自然科学基金铁路联合基金(U2268216)
中国铁道科学研究院集团有限公司基金(2023YJ185)。
关键词
青藏铁路
多年冻土
冷负荷
热棒
制冷量
Qinghai-Xizang railway
permafrost
cooling load
thermoprobe
cooling capacity
