考虑水稳定性影响的膨胀土路基填料承载比特性

根据试验规范进行室内承载比(CBR)试验,研究压实度和膨胀率对其承载比(CBR)值的影响规律,分析膨胀土以及石灰改良膨胀土的CBR值随压实度和膨胀势变化的基本规律,研究认为,CBR值随压实度的减小而减小,随膨胀势的减小而增大。石灰改良膨胀土用于路堤填筑时,压实度略低的标准控制,有利于路堤的长期稳定。

The CBR of Expansive Soil Embankment Considering the Influencing of Hydration

According to the experimentation criterion, the paper studies the law of influences of degree of compaction and expansion rate on bearing strength(California Bearing Ratio,CBR) of expansive soil and lime treated expansive soil. It is found that the CBR value of expansive soil varies with the expansion rate and compaction effort. The paper indicates that the CBR value decreased with the decrease of degree of compaction, and decreased with the increase of expansion rate. It is concluded that the degree of compaction must be slightly low when the lime treated expansive soil is used in embankment filling, which is helpful for the long-term stability of the embankment.