摘要
寒区土体河渠的研究对寒区土渠灌溉系统具有重要的影响,也对国家农业经济的发展具有重大的意义。通过对俄罗斯萨哈共和国典型寒区土渠进行监测与分析,对Khorobut、Khalaany、Dadaar和Shestakovskaya四个灌溉体系的观测研究结果分别进行论述与分析。在本文中主要论述Khalaany流域灌溉系统的监测与分析成果,指出:(1)Khalaany灌溉系统区域内的地下冰可以分为冰水泥、纹理形成冰和冰沉积物,主要的低温过程是冻胀、热融、热蚀和冻缩开裂;(2)针对Khalaany灌溉系统中土壤物理性质,进行季节性解冻深度的周期动态观测,发现冻融循环引会发塑性指数变化,从而影响边坡稳定性;(3)Aryy灌区地质条件与Khalaany灌溉系统相同,实验站包括地面管网、三个灌溉渠和一个排灌渠。
The research of cold soil channel has an important influence on the cold and canal irrigation system,the development of the national agricultural economy is of great significance.Through the monitoring and analysis of Russia,the Republic of the typical cold regions of Khorobut Khalaany,the canal,observation of Dadaar and Shestakovskaya four respectively irrigation system are discussed and analyzed.In this paper mainly discusses the Khalaany basin irrigation system monitoring and analysis of results,point out:(1)The underground ice in Khalaany irrigation system can be divided into ice cement,texture forming ice and ice sediment,and the main low temperature processes are frost heave,thermal thawing,thermal corrosion and freezing shrinkage cracking;(2)In view of the soil physical properties of Khalaany irrigation system,the seasonal dynamic observation of thawing depth was conducted,and it was found that the freezing thawing cycle led to the change of plastic index,thus affecting the slope stability;(3)Aryy in the same geological conditions and Khalaany irrigation system,including ground experiment station network,three earth canal and an irrigation channel.
基金
冻土工程国家重点实验室开放基金(SKLFSE201310)
黑龙江省水文局项目(2014230101000411)
