摘要
【目的】季节性冻土地区的土壤在冬季气温降低时冻结,春季气温回升时融化。水分迁移是导致土体发生冻胀的根本原因,严重危害到渠道、公路、铁路、桥梁等工程结构的安全与使用寿命,为减少工程结构冻害问题的产生,对冻土中水分迁移问题进行研究。【方法】从水分迁移的基本概念、现象、试验方法、变化规律及影响因素等方面对国内外有关土体冻融过程中水分迁移的研究进行了总结与归纳。【结果】对目前研究中存在的问题与不足进行了总结,并对今后季节冻土区的水分迁移的研究方向进行了展望。【结论】目前学者们关于水分迁移的研究已取得了巨大的成就,但仍存在一些问题,如在进行水分迁移试验时未全面体现自然条件的影响、建立耦合模型时参数的确定方法不够精准、在进行水分迁移影响因素试验时考虑因素较为单一,无法全面揭示水分迁移机理等。
【Objective】The soil in the seasonal frozen soil area freezes when the temperature drops in winter and melts when the temperature rises in spring.Water migration is the root cause of frost heaving of soil,which seriously endangers the safety and service life of engineering structures such as canals,highways,railways,bridges,etc.In order to reduce the problem of freezing damage to engineering structures,the water migration in frozen soil is studied.【Method】Based on the basic concepts,phenomena,test methods,change laws and influencing factors of water migration,the domestic and foreign researches on water migration during soil freezing and thawing were summarized and summarized.【Result】The problems and deficiencies in the current research were summarized,and the research directions of water migration in the frozen soil area in the future season were prospected.【Conclusion】At present,scholars have made great achievements in the study of water migration,but there were still some problems,such as the incomplete impact of natural conditions when carrying out water migration experiments,the parameter determination method was not accurate enough when establishing coupling models,and the migration influencing factors are considered in a single factor in the test,which cannot fully reveal the mechanism of water migration.
作者
汪菲
唐少容
王红雨
WANG Fei;TANG Shaorong;WANG Hongyu(College of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China;Ningxia Research Center of Technology on Water-saving Irrigation and Water Resources Regulation,Yinchuan 750021,China;Engineering Research Center for Efficient Utilization of Water Resources in Modern Agriculture on Arid Regions,Yinchuan 750021,China)
出处
《灌溉排水学报》
CSCD
北大核心
2020年第S01期51-55,70,共6页
Journal of Irrigation and Drainage
基金
宁夏重点研发项目(引才专项)资助项目(2018BEB04035)
关键词
冻土
冻胀
水分迁移
驱动力
frozen soil
frost heave
water migration
driving force
