摘要
在不同掺入量及不同上覆荷载作用下,对不同材料改良膨胀土的有荷膨胀率进行了试验研究.结果表明,石灰、水泥、粉煤灰、风化砂4种材料均能有效遏制膨胀土的有荷膨胀率,不同的上覆荷载和不同的掺入量对有荷膨胀率的影响较大.随着上覆荷载的增加,各改良膨胀土的有荷膨胀率逐渐减小,说明了增大上覆荷载能较好地抑制膨胀土的膨胀变形.随着各材料掺入量的增加,有荷膨胀率逐渐减小,但减小的幅度有所不同.通过分析试验数据可以看出,当改良材料掺入量最大时,在各级荷载作用下,风化砂改良膨胀土的有荷膨胀率减小量最大,其后依次是石灰、水泥、粉煤灰;当上覆荷载由0增大到75 kPa时,不同改良材料在不同掺入量下,有荷膨胀率减小量最大的是石灰,其次是水泥,再次是粉煤灰,最后是风化砂.
The inflation ratio of different materials modified expansive soil was studied under the different mixing and overlying load .The results showed that four materials （ lime, cement, fly ash, weathered sand ） can effectively curb the expansive soil inflation ratio , different overlying load and different incorporation have great effects on the infla -tion ratio.With the increase in the load of the overlying , the inflation ratio of the improved expansive soil gradually de-creases , which indicated that the overlying load can inhibit the expansion of expansive soil deformation .With the in-crease in the amount of incorporation of the respective materials , the inflation ratio decreases gradually , but the re-duced amplitude was different .It can be seen from the analysis of the test data that when the improved materials incor -poration loads at all levels , weathered sand expansive soil improved the inflation ratio decreases the largest amount , fol-lowed by lime, cement, fly ash;when the overlying load increased from 0 to 75 kPa, the improved materials in differ-ent incorporation inflation ratio decreases the amount of lime , followed by cement , fly ash and weathered sand .
出处
《信阳师范学院学报（自然科学版）》
CAS
北大核心
2014年第1期149-152,共4页
Journal of Xinyang Normal University(Natural Science Edition)
基金
湖北省教育厅自然科学研究重点项目(D20131304)
