聚丙烯纤维加筋膨胀土强度试验研究

为了研究聚丙烯纤维对膨胀土强度的影响,进行了大量的室内试验。试验结果表明,纤维膨胀土的强度比素土有了明显的提高,且随着纤维含量的增加,无侧限抗压强度增加,当纤维含量为0.3%时,无侧限抗压强度和纤维土的粘聚力达到最大值,随着纤维含量的继续增加,无侧限抗压强度和粘聚力降低,说明0.3%的纤维含量为最优含筋量。相同纤维含量的情况下,纤维土的强度随着纤维长度的增加而明显增加。同时聚丙烯纤维还可以增加纤维膨胀土的峰值强度,降低纤维膨胀土残余强度的损失,增加土样破坏的韧性,延缓破坏。

Study on Strength of Polypropylene Fiber Reinforced Expansive Soil

In order to study the impact that the fiber on the strength of expansive soil,a lot of indoor experiment were conducted.Experimental results show that the strength of fiber-reinforced expansive soil is much higher than the expansive soil,and with the increase of fiber content,unconfined compressive strength increases.When the fiber content is 0.3%,the unconfined compressive strength and the cohesion of reinforced fiber expansive soil reach the maximum,then the strength decreases with the significantly incre...