纤维水泥土无侧限抗压强度试验研究-铁道科学与工程学报.PDF

第 14 卷 第 7 期 铁道科学与工程学报 Volume 14 Number 7 2017 年 7 月 Journal of Railway Science and Engineering July 2017 纤维水泥土无侧限抗压强度试验研究 阮波，邓林飞，马超，李方星，邓威 ( 中南大学 土木工程学院，湖南 长沙 410075) 摘 要：为研究玻璃纤维加筋水泥土的效果，开展无侧限抗压强度试验。分别研究纤维掺量和纤维长度对纤维加筋水泥土无 侧限抗压强度的影响。研究结果表明：纤维的加入能提高水泥土的延性，改善水泥土的脆性，极大的提高水泥土的残余强度； 同时纤维能有效提高水泥土的无侧限抗压强度，纤维水泥土的强度受纤维掺量影响较大，最优纤维掺量为 2‰ ；纤维掺量一 定时，当纤维长度为9 mm 时，纤维的加筋效果最佳。 关键词：玻璃纤维；水泥土；无侧限抗压强度；纤维掺量；纤维长度 中图分类号：TU447 文献标志码：A 文章编号：1672−7029(2017)07 −1415−05 Experimental study on unconfined compressive strength of fiber reinforced cement soil RUAN Bo, DENG Linfei, MA Chao, LI Fangxing, DENG Wei (School of Civil Engineering, Central South University, Changsha 410075, China) Abstract: For the purpose of studying the effect of glass fiber reinforced cement soil ，unconfined compressive strength test was carried out. The effects of fiber content and fiber length on the unconfined strength of fiber reinforced cement soil were investigated. It is found that the inclusion of fiber can change the brittle behavior of the cement soil to a more ductile behavior and greatly improve the residual strength of the cement soil. The inclusion of fiber within cemented soil causes an increase in the unconfined compressive strength, and the strength of fiber-reinforced cement soil is significantly influenced by the fiber content, of which the optimal value is 2‰. Provided that the fiber content is fixed, the fiber length of 9 mm yields the best fiber reinforcement effect. Key words: glass fiber; cement soil; unconfined compressive strength; fiber content; fiber length 水泥土因其就地搅拌施工、对环境影响小和造 军等[1]对不同水泥掺入比的棱柱体和