欢迎访问《高校地质学报》官方网站，今天是
分享到：

高校地质学报 ›› 2025, Vol. 31 ›› Issue (05): 572-581.DOI: 10.16108/j.issn1006-7493.2024078

• • 上一篇    下一篇

三种形态纤维改良水泥黄土强度与变形特性研究

霍开梽1,2,3，谢婉丽1,2,3，马 陈1,2,3，张嘉豪4，高炫宇1,2,3，狄圣杰5，张 莹5，刘潇敏5   

  1. 1. 西北大学 地质学系，西安 710069；
    2. 西北大学 大陆动力学国家重点实验室，西安 710069；
    3. 西安市黄土动力灾害防控与地质环境修复重点实验室，西安 710069；

    4. 西北大学 碳中和学院，西安 710069；

    5.中国电建集团西北勘测设计研究院有限公司，西安 710100

  • 出版日期:2025-10-20 发布日期:2025-10-20

Study on Strength and Deformation Characteristics of Cement Loess Improved with Three Forms of Fiber

HUO Kaizhi1,2.3，XIE Wanli1,2,3，MA Chen1,2,3，ZHANG Jiahao4，GAO Xuanyu1,2.3，DI Shengjie5，ZHANG Ying5，LIU Xiaomin5#br#   

  1. 1. Department of Geology, Northwest University, Xi’an 710069, China;
    2. State Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, China;
    3. Xi’an Key Lab of Prevention of Loess Dynamic Disaster and Restoration of Environment，Xi’an 710069, China;
    4. Carbon Neutrality Collegem, Northwest University, Xi’an 710069, China;
    5. Power China Northwest Engineering Corporation Limited, Xi’an 710100, China
  • Online:2025-10-20 Published:2025-10-20

PDF (PC)

29

摘要： 为探究纤维形态对水泥黄土强度与变形特性的影响，该研究以掺入三种不同形态（束状单丝纤维、网状纤维、绞联纤
维）聚丙烯纤维的水泥黄土为研究对象，开展了直剪、静三轴、SEM试验。试验结果表明：（1）三类纤维的加入均可有效提升水泥黄土的抗剪强度与黏聚力，且三种土体黏聚力随维掺量的增加均呈先增大后减小的趋势，绞联、网状、束状单丝纤维的最优掺量为0.3%、0.35%、0.55%；（2）绞联纤维与网状纤维改良水泥黄土在直剪试验与三轴试验中强度与变形特性存在较大差异；（3）网状纤维的三维网状结构在三轴试验中能够有效约束土体变形提高土体强度，绞联纤维较强的抗变形能力在直剪试验中能够较好的发挥作用；（4）纤维—土界面摩擦效应在三类纤维改良水泥黄土中发挥重要作用, 网状纤维除通过界面摩擦外，其三维空间约束效果也不可忽视，绞联纤维主要通过较好的抗变形能力提高土体强度。

关键词: 纤维形态, 水泥黄土, 强度与变形, 微观机理

Abstract: To investigate the influence of fiber forms on the strength and deformation characteristics of cement loess, the cement loess mixed with three different types of polypropylene fiber (bunched monofilament fiber, mesh fiber, and stranded fiber) was studied by direct shear, static triaxial and SEM tests. The experimental results show that: (1) the addition of three kinds of fibers can effectively improve the shear strength and cohesion of cement loess, and the cohesion of three kinds of soils increases first and then decreases with the increase of the content of dimension. The optimal content of stranded, reticulated and bunched monofilament fibers is 0.3%, 0.35% and 0.55%. (2) The strength and deformation characteristics of modified cement loess with stranded fiber and mesh fiber are different in direct shear test and triaxial test. (3) The three-dimensional network structure of the network fiber can effectively restrain soil deformation and improve soil strength in the triaxial test; The strong deformation resistance of the stranded fiber can play a good role in the direct shear test. (4) The interfacial friction between fiber and soil plays an important role in the improvement of cement loess with three kinds of fibers. Stranded fibers mainly improve soil strength through their good resistance to deformation. 

Key words: fiber form, cement-modified loess, strength and deformation, microscopic mechanism

版权所有 © 《高校地质学报》编辑部
地址：南京市栖霞区仙林大道163号， 南京大学朱共山楼317室　邮编：210023　
电话：025-83594340　 Email：gxdzh@nju.edu.cn
技术支持：北京玛格泰克科技发展有限公司
总访问量 , 今日访问 , 在线人数