宁夏小型U形渠道抗冻胀试验研究进展

The progress in frost-resistant experimental research for miniature Ushaped branch in Ningxia

针对季节性冻土地区农业灌溉中输配水渠道的冻胀破坏问题,通过对近年来国内外渠道防渗以及抗冻胀研究的一些最新研究进展进行总结,在借鉴已有各类渠道抗冻胀试验研究成果的基础上,以宁夏引黄灌区小型U形渠道"两拼式"混凝土衬砌结构为例,着重对斗、农级U形渠道的抗冻胀试验作了初步探讨,就试验观测中存在的问题进行了讨论分析.最后提出了具体的试验观测方案,以期为当地"两拼式"U形渠道的理论分析与结构计算提供一定的参考.

Based on the problem of the channel of the frost heaving damage in seasonal freezing zone, the new research progress in the canal seepage control and anti-frost heaving destruction was introduced at home and abroad in recent years. Taking the concrete lining structure of splicing two arc-plates for example, which is U-shaped canal in Yellow River irrigation district in Ningxia, discussion focused on antifreeze test and problems in observation of U-shaped lateral canals and field canal on the basis of existing channel frost heaving test research results. Finally, the detailed schemes were put forward to reference of theoretical analysis and construction calculation on U-shaped canal of splicin~ two arc-olates in the local olace.