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Journal of Xichang University(Natural Science Edition)
2024,38
(1)
49-55
聚丙烯纤维加筋和石灰改良昔格达土工程性质试验
作 者：
余明东
单 位：
西昌学院土木与水利工程学院
关键词：
昔格达土;聚丙烯纤维;纤维加筋;石灰改良;工程性质
摘 要：
为探讨聚丙烯纤维加筋和石灰共同改良攀西地区昔格达土的工程性质,在昔格达土中掺入不同含量长度为2.5 cm的聚丙烯纤维,制备不同聚丙烯纤维掺量石灰改良土样,然后进行有荷膨胀试验、无侧限抗压试验和直接剪切试验.结果表明:聚丙烯纤维加筋不仅可减小石灰土的膨胀性,还可以改善昔格达土的抗压、抗剪和变形等力学特性;直剪试验表明,聚丙烯纤维加筋石灰土颗粒与聚丙烯纤维之间的摩擦力增大,使土样的黏聚力明显增大.结论:聚丙烯纤维加筋能有效改善石灰昔格达土的工程性质,当掺入0.3%的聚丙烯纤维时石灰昔格达土的聚丙烯纤维加筋效果最佳.
译 名：
Experiment on Improving the Engineering Property of Xigeda Soil with Lime and Polypropylene Fiber
关键词：
Xigeda soil%polypropylene fiber%fiber reinforcement%lime improvement%engineering property
摘 要：
To explore the methods to improve the engineering property of Xigeda soil in Panxi regions with polypropylene fiber and lime reinforcement,polypropylene fiber of different content with the length of 2.5 cm was added to the Xigeda soil to make improved soil samples.Then,loaded swelling experiment,compression experiment without lateral confine-ment,and direct shear experiment were conducted.The results showed that polypropylene fiber reinforcement could not only reduce the expansibility of lime soil,but also improve the mechanical traits,such as compression-resistant,shear-resistant and deformation properties of Xigeda soil.The direct shear experiment showed that the increased force of friction between the lime soil particles and polypropylene fibers significantly increased the cohesion of in soil samples.Conclu-sion:Polypropylene fiber reinforcement can effectively improve the engineering properties of Xigeda lime soil.When 0.3%polypropylene fiber is added,the effect of polypropylene fiber reinforcement of Xigeda lime soil can be maximized.
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