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黄麻纤维加筋土的强度特性及增强机理研究
引用本文:钱叶琳,王洁,吕卫柯,郭盼盼,单生彪,汪亦显.黄麻纤维加筋土的强度特性及增强机理研究[J].河北工程大学学报,2016,33(2):19-24.
作者姓名:钱叶琳  王洁  吕卫柯  郭盼盼  单生彪  汪亦显
作者单位:安徽路桥工程集团有限责任公司, 安徽 合肥 210029;合肥工业大学 土木与水利工程学院, 安徽 合肥 230009;安徽路桥工程集团有限责任公司, 安徽 合肥 210029;安徽路桥工程集团有限责任公司, 安徽 合肥 210029;合肥工业大学 土木与水利工程学院, 安徽 合肥 230009;合肥工业大学 土木与水利工程学院, 安徽 合肥 230009;合肥工业大学 土木与水利工程学院, 安徽 合肥 230009
基金项目:国家自然科学基金资助项目(51304057);深部岩土力学与地下工程国家重点实验室开放研究基金项目资助(SKLGDUEK1406);合肥市重点工程建设局科技支撑项目(2013CGAZ0771);安徽省住房城乡建设厅科学技术计划项目(2013YF-27)
摘    要:采用黄麻纤维对合肥地铁工程沿线广泛分布地典型弱潜势膨胀土加筋改良处理,通过改变黄麻纤维掺量和长度对包含素膨胀土和纤维加筋土的土样进行了一系列室内直剪试验和无侧限抗压强度试验,探讨了纤维长度和纤维含量对加筋土强度特性的影响,并简要分析了纤维增强机理。研究结果表明:黄麻纤维加筋可显著提高土体抗剪强度和膨胀土的无侧限抗压强度,改善了膨胀土的剪切破坏形式,减小了破坏时裂隙的宽度和长度。

关 键 词:黄麻纤维  纤维加筋土  抗剪强度  增强机理  无侧限抗压强度试验
收稿时间:2016/2/21 0:00:00

Research on strength characteristics and improving mechanism of Jute fiber-reinforced soil
Authors:QIAN Yelin  Wang Jie  Lv Weike  GUO Panpan  SHAN Shengbiao and WANG Yixian
Affiliation:Anhui Road & Bridge Group Co., Ltd, Anhui Hefei 210029, China;School of Civil and Hydraulic Engineering, Hefei University of Technology, Anhui Hefei 230009, China;Anhui Road & Bridge Group Co., Ltd, Anhui Hefei 210029, China;Anhui Road & Bridge Group Co., Ltd, Anhui Hefei 210029, China;School of Civil and Hydraulic Engineering, Hefei University of Technology, Anhui Hefei 230009, China;School of Civil and Hydraulic Engineering, Hefei University of Technology, Anhui Hefei 230009, China;School of Civil and Hydraulic Engineering, Hefei University of Technology, Anhui Hefei 230009, China
Abstract:The classical weak expansive soil existed widely in Hefei was treated by mixing with randomly and uniformly distributed jute fiber. And a series of direct shear and unconfined compression tests were conducted on soil samples of ten groups including expansive soil and reinforced soil with jute fiber of varying fiber content and fiber length. Besides, the improving mechanism of fiber reinforcement and the effects of fiber length and fiber content on the strength characteristics of jute fiber-reinforced soil were analyzed briefly. Results of this investigation show that:Incorporating randomly distributed jute fiber into expansive soil could enhance observably the shear strength of soil, Jute fiber reinforcement improved the shear failure mode of expansive soil, at the same time, the length and the width of the fractures on the surface of soil specimens after failure reduced largely.
Keywords:Jute fiber  fiber-reinforced soil  shear strength  improving mechanism  unconfined compression test
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