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基于对冻土区路基冻胀翻浆病害机制的分析,提出了一种综合利用透水土工布、块碎石层和防水土工布的新型防道路冻胀翻浆的路基结构,并通过室内模型试验研究其防冻胀翻浆效果。结果表明:与普通路基相比,不论环境温度最高还是最低时,新型综合防冻胀翻浆路基不但能有效地降低路基内的温度,具有良好的降温效果;而且能大幅度地减小路基内的含水率,并且含水率减小率随着气温周期循环的增加呈线性增大的趋势,这对防止冻胀翻浆病害的发生是有利的;此外,新型综合防冻胀翻浆路基结构有成本低、易于施工等特点,极具工程应用前景。
Based on the analysis of the mechanism of freezing frost heaving in subgrade in permafrost region, a new type of roadbed structure with frost heaving and expansive anti-roadway based on permeable geotextile, block and gravel layer and waterproof geotextile is proposed. Through indoor model test, Frost heave inflation effect. The results show that, compared with ordinary subgrade, the new comprehensive frost heaving and freezing subgrade can not only effectively reduce the temperature in subgrade but also have a good cooling effect, and can greatly reduce the water content in subgrade Rate, and the rate of decrease of moisture content tends to increase linearly with the increase of cycle temperature, which is beneficial to prevent the occurrence of frost heaving. In addition, the new integrated frost heave frost subgrade structure has the advantages of low cost and easy construction And so on, great engineering application prospects.