摘要
首先对膨胀土基本性质做了试验分析,通过天然膨胀土和掺人纤维前后的石灰土的击实试验,得出了掺入少量纤维对石灰土的最优含水率和最大干密度影响很小。通过有荷膨胀率试验,得出了纤维能够抑制石灰土的膨胀性,纤维掺入量在0.05%～0.1%之间时,线膨胀率随纤维掺入量的增多而降低显著,在0.1%～0.2%之间时降低幅度减小。由元侧限抗压强度试验和承载比试验,得出了纤维加筋能够提高石灰土的强度,并干湿循环试验评价了该法的可行性。
The researcher first did experimental analysis on the basic property of expansive soil, and the compaction test on natural expansive soil and on lime soil with and without fibers. The conclusion is that the lime soil with a small quantity of fibers has little effect on optimum moisture content and the maximum dry density. According to the linear swelling ratio experiment, the researcher concludes that fibers can retain the expansion of the lime. The linear expansion rate decreases remarkably with the increasing of the mixing amount of fibers between 0.05% - 0.1%, but slightly between 0.1% - 0.2%. With the unconfined compaction test and CBR （ California Bearing Ratio）, fibers which are reinforced can increase the compressive press of the lime, and the practicability of the above method is evaluated in this paper.
出处
《岩土工程技术》
2011年第4期214-216,F0003,共4页
Geotechnical Engineering Technique
关键词
纤维
石灰
膨胀土
膨胀率
强度
加筋
fibers
lime
expansive soil
expansion rate
compressive press
reinforce
