论文部分内容阅读
以南阳某公路膨胀土为研究对象,将石灰、玄武岩纤维按照不同比例掺入到膨胀土中制取试样,进行击实试验、无侧限抗压强度试验、直剪试验、膨胀力试验。试验结果表明,石灰可以有效降低膨胀土的塑性指数;随着石灰添加量的增加,无侧限抗压强度会出现一个峰值;玄武岩纤维可以有效提高膨胀土的延性;石灰和玄武岩纤维两者共同作用可以有效降低膨胀土的膨胀力,其中石灰起主导作用。
Taking expansive soil of a highway in Nanyang as the research object, the lime and basalt fibers were mixed into the expansive soil according to different proportions to prepare the samples for compaction test, unconfined compressive strength test, direct shear test and expansive force test. The results show that lime can effectively reduce the plasticity index of expansive soils. With the increase of lime loading, there will be a peak of unconfined compressive strength. Basalt fiber can effectively improve the ductility of expansive soils. Both lime and basalt fibers The role of expansive soil can effectively reduce the expansive force, of which lime plays a leading role.