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| Effect of sampling conditions on the mechanical properties and water stability and cracking resistance of fiber reinforced soil |
| CHU Feng1*, CHEN Ting1, XU Chuanzhao2, LUO Jingbo2, LI Zhe1 |
(1. College of Urban Planning and Municipal Engineering, Xian Polytechnic University, Xian, Shaanxi 710048, China;
2. China Jikan Research Institute of Engineering Investigations and Design Co., Ltd., Xian, Shaanxi 710043, China) |
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Abstract To address the issue of uneven fiber dispersion during the preparation of fiber-reinforced soils, a fluid sedimentation method was proposed. Fiber-reinforced soil specimens were prepared using both the fluid sedimentation method (referred to as the “fluid method”) and the traditional compaction method (referred to as the “traditional method”), with variations in fiber types (polypropylene, PP/polylactic acid, PLA), fiber lengths (5 mm and 10 mm), and fiber contents (0.2% to 1.0%). Unconfined compressive strength tests, slaking tests, cracking tests, and scanning electron microscopy (SEM) analyses were conducted to investigate the effects of the sample preparation method and fiber parameters on the mechanical and water stability properties of fiber-reinforced soils. The test results indicate that the fluid method disperses fibers uniformly in a three-dimensional isotropic manner through slurry adsorption. The unconfined compressive strength of the fiber-reinforced soil prepared using the fluid method is significantly higher than that of the soil prepared by the traditional method. Additionally, the PLA fiber-reinforced soil produced by the fluid method demonstrates a markedly enhanced capacity for plastic deformation. In the slaking test, the specimens prepared using the fluid method exhibit a significantly lower disintegration rate, attributed to the strong bonding of soil particles and the network confinement provided by the fibers. Notably, the PLA fiber specimens prepared by the fluid method display a “disintegration without dispersion” phenomenon. The cracking test results reveal that the PLA fiber-reinforced soil prepared by the fluid method exhibits excellent crack inhibition performance, with optimal results observed at a fiber length of 5 mm and a fiber content of 1.0%. Microscopic analysis shows that the fluid method results in finer soil particles and smaller pore volumes, with both PP and PLA fibers evenly distributed within the soil matrix. Through comparative analysis, it is confirmed that the fluid sedimentation method offers significant advantages in terms of fiber dispersion and performance enhancement. These findings provide a novel and effective solution for the preparation and engineering application of fiber-reinforced soils.
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[1] LEAL D，WINTER M G，SEDDON R，et al. A comparative life cycle assessment of innovative highway slope repair techniques[J]. Transportation Geotechnics，2020，22(1)：100322.
[2] 李 立，曹文昭，刘 洋，等. 桩承式加筋土结构拓宽路基工作特性离心模型试验[J]. 岩石力学与工程学报，2021，40(增2)：3 357–3 366.(LI Li，CAO Wenzhao，LIU Yang，et al. Centrifugal model test on the performance of pile-supported reinforced-earth structure for subgrade widening[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(Supp.2)：3 357–3 366.(in Chinese))
[3] 赵崇熙，徐 超，王清明，等. 土工合成材料加筋土桥台极限承载力的离心载荷试验[J]. 岩土力学，2024，45(6)：1 643–1 650.(ZHAO Chongxi，XU Chao，WANG Qingming，et al. Centrifuge load test on ultimate bearing capacity of geosynthetic-reinforced soil abutment[J]. Rock and Soil Mechanics，2025，45(6)：1 643–1 650.(in Chinese))
[4] 吴红刚，牌立芳，赖天文，等. 山区机场高填方边坡桩–锚–加筋土组合结构协同工作性能优化研究[J]. 岩石力学与工程学报，2019，38(7)：1 498–1 511.(WU Honggang，PAI Lifang，LAI Tianwen，et al. Study on cooperative performance of pile-anchor-reinforced soil combined retaining structure of high fill slopes in mountainous airports[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(7)：1 498–1 511.(in Chinese))
[5] ZHANG J H，WEI Y J，ZHU Y L，et al. Stability analysis of three-dimensional slope reinforced by natural fiber include wheat straw and bamboo[J]. Scientific Reports，2025，15(2)：4 598.
[6] WINTER M G，NETTLETON I M，SEDDON R，et al. The assessment of innovative geotechnical slope repair techniques[J]. Proceedings of the Institution of Civil Engineers - Geotechnical Engineering，2022，177(4)：405–413.
[7] 褚 峰，祝瑜光，邵生俊，等. 纤维加筋黄土抗压强度试验及估测模型研究[J]. 岩石力学与工程学报，2025，44(4)：1 040–1 052. (CHU Feng，ZHU Yuguang，SHAO Shengjun，et al. Study on compressive strength test and estimation model of fiber reinforced loess[J]. Chinese Journal of Rock Mechanics and Engineering，2025，44(4)：1 040–1 052.(in Chinese))
[8] 褚 峰，吴云超，张宏刚，等. 纤维加筋黄土力学特性及土水特征试验研究[J]. 地下空间与工程学报，2025，21(2)：472–480.(CHU Feng，WU Yunchao，ZHANG Honggang，et al. Experimental study on the mechanical deformation characteristics and soil water characteristics of waste fiber reinforced loess[J]. Chinese Journal of Underground Space and Engineering，2025，21(2)：472–480.(in Chinese))
[9] 牛 雷，吴占君，徐丽娜，等. 不同纤维对土体力学特性的影响及机制分析[J]. 长江科学院院报，2024，41(11)：144–150.(NIU Lei，WU Zhanjun，XU Lina，et al. Effect of different fibers on soil mechanical properties and mechanism analysis[J]. Journal of Changjiang River Scientific Research Institute，2024，41(11)：144–150.(in Chinese))
[10] 姜宇波，柴寿喜，魏 丽，等. 四种因素对纤维加筋盐渍土抗压性能的影响[J]. 岩土力学，2016，37(增1)：233–239.(JIANG Yubo，CHAI Shouxi，WEI Li，et al. Effects of four factors on the compressive properties of fiber reinforced saline soil[J]. Rock and Soil Mechanics，2016，37(Supp.1)：233–239.(in Chinese))
[11] 蒋希雁，刘嘉璐，李明洋，等. 棕榈纤维加筋土抗剪强度特性及机制研究[J]. 力学季刊，2024，45(1)：274–285.(JIANG Xiyan，LIU Jialu，LI Mingyang，et al. Study on shear strength characteristics and mechanism of palm fiber reinforced soil[J]. Mechanics Quarterly，2024，45(1)：274–285.(in Chinese))
[12] YAZICI M F，KESKIN S N. Experimental investigation of the mechanical properties of polypropylene fiber-reinforced clay soil and development of predictive models：effects of fiber length and fiber content[J]. Arabian Journal for Science and Engineering，2024，49(10)：13 593–13 611.
[13] LIU Y，HAN D，LIU N，et al. Reinforcement mechanism analysis of lattice beam and prestressed anchor rod system for loess slope[J]. Frontiers in Earth Science，2023，11(6)：1121172.
[14] 褚 峰，罗静波，邓国华，等. 纤维纱加筋黄土动力变形动强度及震陷特性试验研究[J]. 岩石力学与工程学报，2020，39(1)：177–190.(CHU Feng，LUO Jingbo，DENG Guohua，et al. Experimental study on dynamic deformation strength and seismic subsidence characteristics of fiber yarn reinforced loess[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(1)：177–190.(in Chinese))
[15] 沙琳川，王桂尧，张永杰，等. 含水率与加筋率对加筋土抗剪强度的影响规律研究[J]. 水文地质工程地质，2018，45(2)：51–58.(SHA Linchuan，WANG Guiyao，ZHANG Yongjie，et al. A study of influence of water content and reinforcement ratio on the shear strength of reinforced soil[J]. Hydrogeology and Engineering Geology，2018，45(2)：51–58.(in Chinese))
[16] 卢 浩，晏长根，杨晓华，等. 麦秆纤维加筋土的抗冲蚀性及其防护效果试验研究[J]. 铁道科学与工程学报，2017，14(10)：2 138–2 145.(LU Hao，YAN Changgen，YANG Xiaohua，et al. Experimental research on anti-eroding property and protection effect of reinforced soil with straw fibers[J]. Journal of Railway Science and Engineering，2017，14(10)：2 138–2 145.(in Chinese))
[17] HU Q Z，SONG W S，HU J W. Study of the mechanical properties and water stability of microbially cured，coir-fiber-reinforced clay soil[J]. Sustainability，2023，15(17)：13 261.
[18] 安 宁，晏长根，王亚冲，等. 聚丙烯纤维加筋黄土抗侵蚀性能试验研究[J]. 岩土力学，2021，42(2)：501–510.(AN Ning，YAN Changgen，WANG Yachong，et al. Experimental study on anti-erosion performance of polypropylene fiber-reinforced loess[J]. Rock and Soil Mechanics，2021，42(2)：501–510.(in Chinese))
[19] 王桂尧，沙琳川，曹文贵，等. 加筋率对稻秸秆加筋土开裂特性的试验研究[J]. 水文地质工程地质，2017，44(5)：52–58.(WANG Guiyao，SHA Linchuan，CAO Webgui，et al. An experiment study of cracking properties of rice straw reinforced soil with different ratios[J]. Hydrogeology and Engineering Geology，2017，44(5)：52–58.(in Chinese))
[20] 谷英东，程 青，唐朝生，等. 不同干密度条件下植被土干缩开裂特性试验研究[J]. 岩土工程学报，2023，45(11)：2 420–2 428.(GU Yingdong，CHENG Qing，TANG Chaosheng，et al. Desiccation cracking behavior of vegetated soil with various dry densities[J]. Chinese Journal of Geotechnical Engineering，2023，45(11)：2 420–2 428.(in Chinese))
[21] GUO H，LI W Y，DANG F，et al. The shrinkage crack characteristics of jute fiber-modified clay under wet-dry cycle conditions[J]. Construction and Building Materials，2025，472(15)：140840.
[22] BASSON M S，AYOTHIRAMAN R. Effect of human hair fiber reinforcement on shrinkage cracking potential of expansive clay[J]. Bulletin of Engineering Geology and the Environment，2019，79(4)：2 159–2 168.
[23] CHADUVULA U，VISWANADHAM B V S，KODIKARA J. A study on desiccation cracking behavior of polyester fiber-reinforced expansive clay[J]. Applied Clay Science，2017，142(8)：163–172.
[24] 李 敏，柴寿喜，杜红普，等. 麦秸秆加筋土的合理布筋位置和抗剪强度模型[J]. 岩石力学与工程学报，2010，29(增2)：3 923– 3 929.(LI Min，CHAI Shouxi，DU Hongpu，et al. Reasonable reinforcement position and shear strength model of reinforced saline soil with wheat straw and lime[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(Supp. 2)：3 923–3 929.(in Chinese))
[25] 周永祥，霍孟浩，侯 莉，等. 低强度流态填筑材料的研究现状及展望[J]. 材料导报，2024，38(15)：130–138.(ZHOU Yongxiang，HUO Menghao，HOU Li，et al. Current research and prospect of low strength flowable filling materials[J]. Materials Reports，2024，38(15)：130–138.(in Chinese))
[26] 肖 杰，刘 静，向家骏，等. 流态多源固废固化黄土固化剂配比优化及强度形成机制[J]. 中国公路学报，2025，38(3)：250–263.(XIAO Jie，LIU Jing，XIANG Jiajun，et al. Optimization of curing-agent mix ratio and mechanism of strength of fluidized multisource solid-waste solidified loesses[J]. China Journal of Highway and Transport，2025，38(3)：250–263.(in Chinese))
[27] 王艺程. 流态固化土在路基工程中的应用研究[硕士学位论文][D]. 吉林：吉林大学，2021.(WANG Yicheng. Research on application of fluid-solidified soil in subgrade engineering[M. S. Thesis][D]. Jilin：Jilin University，2021.(in Chinese))
[28] 高子琛. 预拌流态固化土的路用性能研究[硕士学位论文][D]. 西安：长安大学，2023.(GAO Zichen. Study on road performance of premixed fluid solidified soil[M. S. Thesis][D]. Xi'an：Chang'an University，2023.(in Chinese))
[29] 中华人民共和国国家标准编写组. GB/T50123–2019 土工试验方法标准[S]. 北京：中国计划出版社，2019.(The National Standards Compilation Group of People?s Republic of China GB/T50123—2019 Standard for geotechnical test methods[S]. Beijing：China Planning Press，2019.(in Chinese))
[30] 范 森，段梦洁，刘亚兰，等. 聚乳酸材料在不同土壤环境中生物降解的菌群结构分析[J]. 微生物学通报，2017，44(10)：2 321– 2 329.(FAN Sen，DUAN Mengjie，LIU Yalan. Microbial diversity and community structure in biodegradation of poly(lactic) acid (PLA) in different soil environments[J]. Microbiology China，2017，44(10)：2 321–2 329.(in Chinese))
[31] 黄英豪，戴济群，徐 锴. 新拌固化淤泥的流动性和黏滞性试验研究[J]. 岩土工程学报，2022，44(2)：235–244.(HUANG Yinghao，DAI Jiqun，XU Kai. Flowability and viscosity of freshly solidified dredged materials[J]. Chinese Journal of Geotechnical Engineering，2022，44(2)：235–244.(in Chinese))
[32] 王德银 ，唐朝生，李 建，等. 纤维加筋非饱和黏性土的剪切强度特性[J]. 岩土工程学报，2013，35(10)：1 933–1 940.(WANG Deyin，TANG Chaosheng，LI Jian. Shear strength characteristics of fiber-reinforced unsaturated cohesive soils[J]. Chinese Journal of Geotechnical Engineering，2013，35(10)：1 933–1 940.(in Chinese))
[33] 褚 峰，邵生俊，陈存礼，等. 纤维纱加筋黄土力学变形特性及本构模型研究[J]. 工程地质学报，2023，31(3)：1 059–1 072.(CHU Feng，SHAO Shengjun，CHEN Cunli，et al. Mechanical deformation characteristics and constitutive model of fiber yarn reinforced loess[J]. Journal of Engineering Geology，2023，31(3)：1 059–1 072.(in Chinese))
[34] 童第科，冯 登，黄诗渊，等. 压实土体崩解特性的试验研究[J]. 科学技术与工程，2018，18(15)：129–136.(TONG Dike，FENG Deng，HUANG Shiyuan，et al. Experimental investigation of compacted soil disintegration property[J]. Science Technology and Engineering，2018，18(15)：129–136.(in Chinese))
[35] 张建伟，尹 悦，赵聪聪，等. 纤维对水玻璃粉煤灰固化体力学性能的影响[J]. 中国科技论文，2022，17(10)：1 065–1 071.(ZAHNG Jianwei，YIN Yue，ZHAO Congcong，et al. Effect of fiber on mechanical properties of soil solidified by sodium silicate and fly ash[J]. China Science Paper，2022，17(10)：1 065–1 071.(in Chinese))
[36] 唐朝生，施 斌，顾 凯. 纤维加筋土中筋/土界面相互作用的微观研究[J]. 工程地质学报，2011，19(4)：610–614.(TANG Chaosheng，SHI Bin，GU Kai. Microstructural study on interfacial interactions between fiber reinforcement and soil[J]. Journal of Engineering Geology，2011，19(4)：610–614.(in Chinese)) |
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2026, Vol. 45 
