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本文依据140组渠道工程上的实测数据,建立了残留冻胀率与换填比间的定量关系,据此得出了在地下水深埋和浅埋两种情况下,不同土质所要求的换填比。同时根据冻胀试验场220组粗粒土敏感性试验资料得出,当冻层与地下水距离大于或小于50cm时,应分别控制砂砾料内含土量不大于10％和5％。文末提出了防治砂砾料被含砂渠水污染及设立排水设施以保证换填防冻效果的两项措施。
Based on the measured data of 140 groups of canal projects, this paper establishes the quantitative relationship between the residual frost heave rate and the replacement ratio. According to the results, it is found that under the conditions of deep groundwater and shallow buried groundwater, ratio. At the same time, according to the data of 220 sets of coarse-grained soil sensitivity test data of frost heave test field, when the distance between frozen layer and groundwater is more than or less than 50cm, the soil content of gravel material should be controlled not to exceed 10% and 5% respectively. At the end of the article, two measures were put forward to prevent sand gravel from being contaminated by sandy canal water and setting up drainage facilities to ensure the antifreeze effect.