棕榈纤维增强石英砂的力学性能分析

doi:10.16843/j.sswc.2023006

Abstract
Figure/Table
References
Related Citation (3)

Download: PDF (8334 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract [Background] Sandy soil is more likely to cause soil erosion and stratum deformation because of its loose structure, easy liquefaction, easy erosion and other defects. In recent years, fiber reinforcement technology has been widely used in road and slope protection projects because of its ability to improve soil structure and enhance the mechanical properties of soil as a whole. However, when synthetic fibers are used as reinforcing materials to strengthen the soil, the characteristics of synthetic fibers, such as difficult to degrade and easy to cause environmental pollution, make it difficult to be widely promoted in actual projects. Therefore, this paper investigates the effect of mixing natural palm fiber into quartz sand to simulate the effect of plant fiber reinforcement technology on sandy soil, which is of great significance for analyzing the soil and water conservation effect of plant fiber reinforcement technology. [Methods] Triaxial drained compression tests were carried out on saturated palm fiber reinforced quartz sand. The deviator-strain curve, stress path and volume change under different reinforcement conditions were obtained. According to the test results, the coefficient of enhanced strength of fiber reinforced sand, shear strength and void ratio of the compressed sample were analyzed with the fiber content and fiber length. [Results] 1) The peak deviator stress and residual strength of the reinforced sand sample are higher than that of plain sand samples. The maximum coefficient of enhanced strength is 1.39, while the maximum residual strength of the fiber reinforced sand can reach 2.2 times of plain sand. The fiber mainly strengthens the residual strength of the quartz sand. Therefore, the strain softening behavior of pure sand changes into strain hardening performance of fiber reinforced sand, which has more ability to resist the deformation. 2) It shows that the shear strength of sand samples generally increases with the fiber content, as well as generally increases with fiber length. The shear strength is the highest when the fiber length is 20 mm and the fiber content is 0.9%. 3) The volumes of fiber reinforced sand have a similar trend as the pure sand, but they can reach higher values and keep increasing rather than converging at a stable value. Compared with pure sand, the axial strain of fiber reinforced sand changes greatly when reaching the critical porosity, and the dilatancy rate of the specimen reduces, which proves that palm fibers help sand samples enhance the ability to resist greater strains. [Conclusions] The interfacial stress between palm fiber and quartz sand particles improves the mechanical properties of quartz sand, and the results provide a test basis for the application of plant fiber reinforcement technology in sand fixing engineering.

Key words： palm fiber quartz sand mechanical properties fiber reinforced residual strength porosity ratio

Received: 17 June 2024

PACS:	S156.99
	TU411

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	TANG Yuxiao
	LIU Wen
	LIU Xueyan
	WEI Shaowei
	LIU Teng

Cite this article:

TANG Yuxiao,LIU Wen,LIU Xueyan, et al. Mechanical properties analysis of palm fiber reinforced quartz sand[J]. SSWC, 2024, 22(6): 144-154.

URL:

http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2023006 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2024/V22/I6/144

[1]	王仁新. 不同护埂植物对网格式生物埂土壤理化性质及水土保持功能的影响[D]. 重庆: 西南大学, 2017: 75. WANG Renxin. The effect of different terrace-protecting plants on the physicochemical property and water conservation of terrace bio-banks[D]. Chongqing: Southwest University, 2017: 75.
[2]	余燚. 基于柔性加筋理论的根—土复合体强度特性研究[D]. 长沙: 中南林业科技大学, 2022: 82. YU Yi. Research on the strength characteristics of root-soil complex based on the theory of flexible reinforcement[D]. Changsha: Central South University of Forestry and Technology, 2022: 82.
[3]	吕春娟, 陈丽华, 周硕, 等. 油松根系固土的基本力学特性[J]. 水土保持学报, 2011, 25(5): 17. LÜ Chunjuan, CHEN Lihua, ZHOU Shuo, et al. Root basic mechanical properties of soil reinforcement of Pinus tabulaeformis[J]. Journal of Soil Water Conservation, 2011, 25(5): 17.
[4]	刘世雄, 曹兴松, 程睿, 等. 纤维丝固土护坡植生法在边坡防护中的水土保持效应[J]. 山地学报, 2013, 31(6): 701. LIU Shixiong, CAO Xingsong, CHENG Rui, et al. Soil and water conservation effect of continuous spraying filaments and fixing soil planting technology in the side slope protection[J]. Journal of Mountain Science, 2013, 31(6): 701.
[5]	王泽华. 黄土地区公路边坡植物根系加筋特性研究[D]. 武汉: 武汉理工大学, 2015: 71. WANG Zehua. Research on reinforced characteristics of loess area highway slope plant roots[D]. Wuhan: Wuhan University of Technology, 2015: 71.
[6]	DIAMBRA A, IBRAIM E. Fibre-reinforced sand: Interaction at the fibre and grain scale[J]. Geotechnique, 2015, 65(4): 296.
[7]	ELDESOUKY H M, MORSI M M, MANSOUR M F. Fiber-reinforced sand strength and dilation characteristics[J]. Ain Shams Engineering Journal, 2016, 7(2): 517.
[8]	LOVISA J, SHUKLA S K, SIVAKUGAN N. Shear strength of randomly distributed moist fiber-reinforced sand[J]. Geosynthetics International, 2010, 17(2): 100.
[9]	TATSUOKA F, ISHIHARA K. Yielding of sand in triaxial compression[J]. Soils and Foundations, 1974, 14(2): 63.
[10]	MICHAWSKI R L, CERMÁK J. Triaxial compression of sand reinforced with fibers[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2003, 129(2): 125.
[11]	JAVDANIAN H, SOLTANI N, SHAMS G, et al. Investigating the monotonic behavior of fiber-reinforced soil under triaxial compression using experimental modeling[J]. Modeling Earth Systems and Environment, 2021, 7(2): 943.
[12]	刘春红, 韦杰, 史炳林, 等. 加筋材料对紫色土坡耕地埂坎土壤抗剪强度的影响[J]. 水土保持学报, 2019, 33(2): 103. LIU Chunhong, WEI Jie, SHI Binglin, et al. Effects of reinforcement materials on shearing strength of fieldriges on the purple soil sloping farmlands[J]. Journal of Soil Water Conservation, 2019, 33(2): 103.
[13]	雷胜友, 丁万涛. 加筋纤维抑制膨胀土膨胀性的试验[J]. 岩土工程学报, 2005, 27(4): 482. LEI Shengyou, DING Wantao. Experimental investigation on restraining the swell of expansive soil with fibre-reinforcement[J]. Chinese Journal of Geotechnical Engineering, 2005, 27(4): 482.
[14]	廖博, 刘建平, 周花玉. 含根量对秋枫根-土复合体抗剪强度的影响[J]. 水土保持学报, 2021, 35(3): 104. LIAO Bo, LIU Jianping, ZHOU Huayu. Effects of the influence of root content on the shear strength of root-soil composite of Bischofia javanica[J]. Journal of Soil Water Conservation, 2021, 35(3): 104.
[15]	NEERAJA V S, MANJARI K G, BABU G L S. Numerical analysis of effect of orientation of fibers on stress-strain response of fiber reinforced soil[J]. International Journal of Geotechnical Engineering, 2014, 8(3): 328.
[16]	MICHALOWSKI R L, ČERMÁK J. Strength anisotropy of fiber-reinforced sand[J]. Computers and Geotechnics, 2002, 29(4): 279.
[17]	CHEN C W. Triaxial compression and extension tests for fiber-reinforced silty sand[M]//ASCE. Ground Improvement and Geosynthetics. Columbia, USA: University of Missouri Coumbia, 2010: 367.
[18]	MALI S, SINGH B. A study on shear strength of sand reinforced with glass fibres[J]. International Journal of Scientific and Engineering Research, 2013, 4: 285.
[19]	王余靖, 周利军, 王云琦, 等. 直剪试验中土体含水率对根系失效方式的影响[J]. 中国水土保持科学, 2021, 19(2): 43. WANG Yujing, ZHOU Lijun, WANG Yunqi, et al. Effect of soil moisture content on root failure mode in direct shear test[J]. Science of Soil and Water Conservation, 2012, 19(2): 43.
[20]	NOORZAD R, ZARINKOLAEI S T G. Comparison of mechanical properties of fiber-reinforced sand under triaxial compression and direct shear[J]. Open Geosciences, 2015, 7(1): 547.
[21]	NOZOE S, KASAI Y, KANEKO K, et al. Relationship between mechanical properties and fiber mixture ratio in fiber-reinforced sand[J]. Geosynthetics Engineering Journal, 2012(27): 127.
[22]	CHEN C W, LOEHR J E. Undrained and drained triaxial tests of fiber-reinforced sand[M]. Geosynthetics in Civil and Environmental Engineering. Springer, Berlin, Heidelberg, 2009: 114.
[23]	邓可, 王恺, 刘冶球, 等. 纤维改性土壤的研究现状与进展[J]. 广东化工, 2019, 46(13): 112. DENG Ke, WANG Kai, LIU Yeqiu, et al. Research status and progress of fiber modified soil[J]. Guangdong Chemical Industry, 2019, 46(13): 112.
[24]	HEJAZI S M, SHEIKHZADEH M, ABTAHI S M, et al. A simple review of soil reinforcement by using natural and synthetic fibers[J]. Construction and Building Materials, 2012, 30: 100.
[25]	HOSSAIN A, HOSSAIN S, HASAN K. Application of jute fiber in the improvement of subgrade characteristics[J]. American Journal of Civil Engineering, 2015, 3(2): 26.
[26]	KARIMZADEH A A, LEUNG A K, HOSSEINPOUR S, et al. Monotonic and cyclic behaviour of root-reinforced sand[J]. Canadian Geotechnical Journal, 2021, 58(12): 1915.
[27]	KARIMZADEH A A, LEUNG A K, GAO Z. Shear strength anisotropy of rooted soils[J]. Geotechnique, 2022: 1.
[28]	李晓龙. 棕榈纤维的基本性能研究[D]. 重庆: 西南大学, 2012: 64. LI Xiaolong. Studies on basic properties of palm fiber[D]. Chongqing: Southwest University, 2012: 64.
[29]	吴旭阳, 梁庆国, 牛富俊, 等. 黄土剪切应变硬化-软化分类试验研究[J]. 地下空间与工程学报, 2017, 13(6): 1457. WU Xuyang, LIANG Qingguo, NIU Fujun, et al. Study on hardened and softened classification in shear test[J]. Chinese Journal of Underground Space and Engineering, 2017, 13(6): 1457.
[30]	刘方成, 吴孟桃, 杨峻. 土工格栅加筋橡胶砂强度特性试验研究[J]. 岩土力学, 2019, 40(2): 580. Liu Fangcheng, WU Mengtao, YANG Jun. Experimental study of strength characteristics of geogrid reinforced rubber sand mixtures[J]. Rock and Soil Mechanics, 2019, 40(2): 580.
[31]	曾凯锋, 曾凡祥, 刘华北. 加筋钙质砂三轴试验研究[J]. 工程地质学报, 2023, 31(3): 1049. ZENG Kaifeng, ZENG Fanxiang, LIU Huabei. Triaxial test study on reinforced calcareous sand[J]. Journal of Engineering Geology, 2023, 31(3): 1049.
[32]	谭军. 基于非饱和剪切体变特征的渭河砂液化研究[D]. 西安: 长安大学, 2022: 83. TAN Jun. Study on sand liquefaction of Weihe River based on unsaturated shear deformation characteristics[D]. Xi'an: Chang'an University, 2022: 83.