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本文介绍饱水开放系统条件下砂砾石土的冻胀实验及结果,给出了四种土类在不同细颗粒土含量时的冻胀实验结果,并考虑冻结速率的影响;提出了用砂砾石土换填冻层的允许粉粘粒土含量之标准界限和工程实用的冻胀率安全控制指标,给出了其含量与冻胀率的相关曲线及冻胀率预报计算的经验公式。
In this paper, the experiment and results of frost heave of sand and gravel soil under the condition of open water and open system are introduced. The experimental results of frost heave of four kinds of soil under different fine-grained soil contents are given, and the effect of freezing rate is taken into account. The standard limit of permissible clay content in soil-for-frozen-thawing layer and the practical control index of the frost heave rate are given. The correlation curves between the content and the frost heave rate and the empirical formula for predicting and calculating the frost heave rate are given.