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渠道衬砌砼冻胀破坏问题是我国北方地区砼衬砌渠道的大敌,特别是高地下水位,强透水段的砼衬砌渠道冻害最为严重(我省新三义寨引黄工程就属此类)。渠道冻胀破坏主要是由于基土在负气温的作用下,土体孔隙中的水分凝结成冰(水变成冰时体积增长9%),使得土体冻结时膨胀,产生较大的冻胀量和冻胀力,而砼渠道本身不足以抵抗
Channel lining concrete frost heaving destruction is the enemy of concrete lining channels in northern China, especially the high groundwater level, strong permeability section of the concrete lining channel frost damage is most serious (our province Sanyi Village Yellow River Diversion Project belong to this category). Frost heaving channel destruction is mainly due to the role of negative temperature in the soil under the influence of soil temperature, soil moisture in the pores of the soil condensation (ice 9% increase in volume when the water becomes ice), making the soil expansion freeze, resulting in greater frost heave Volume and frost heave, and the concrete channel itself is not enough to resist