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我省北部地区,冬季最低气温达-30℃左右,渠道经反复冻融极易破坏。宜农河滩地下水位高,引水明渠容易滑坡,塌方即不能使用,不仅投资大,维修费高,难开挖,而且严重影响使用年限。若采用水泥沙浆砌石挡土墙,混凝土挡土墙结构引水,造价高,易冻融破坏。为此,我们在1991年河滩宜农荒地开发中,总结了以往经验,从冻胀力学角度分析研究,
In the northern part of our province, the minimum temperature in winter reaches -30 ℃ or so, and the channels are easily damaged by repeated freeze-thaw cycles. Yi Nong floodplain high groundwater, water diversion channel easy landslide, landslides that can not be used, not only investment, high maintenance costs, difficult excavation, but also seriously affect the service life. If the use of cement mortar masonry retaining wall, concrete retaining wall structure diversion, high cost, easy to freeze-thaw damage. For this reason, we summed up the past experience in the development of suitable land for irrigating rivers and lakes in 1991, analyzed and studied the frost heave mechanics,