| 瓜尔豆胶固化黄土的工程特性及抗冲蚀试验研究 |
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| 引用本文： | 杨万里,石玉玲,穆鹏雪,贾卓龙,曹怡菡.瓜尔豆胶固化黄土的工程特性及抗冲蚀试验研究[J].水文地质工程地质,2022,49(4):117-124. |
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| 作者姓名： | 杨万里 石玉玲 穆鹏雪 贾卓龙 曹怡菡 |
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| 作者单位： | 1.甘肃路桥公路投资有限公司, 甘肃 兰州 730030 |
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| 基金项目： | 国家自然科学基金项目（42077265）；甘肃省交通运输厅科技项目（2021-19） |
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| 摘 要： | 为了减少暴雨冲刷条件下黄土边坡侵蚀的发生，提出采用瓜尔豆胶固化黄土对边坡坡面进行防护。基于直剪试验、渗透试验以及模拟暴雨边坡冲刷试验，研究了瓜尔豆胶固化黄土的工程特性及抗冲蚀能力，并对比素黄土与固化黄土的微观结构，探讨了瓜尔豆胶对黄土的加固机制。试验结果表明：瓜尔豆胶可有效增强黄土的抗剪强度和抗渗透性，固化黄土的黏聚力...
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| 关 键 词： | 瓜尔豆胶 固化黄土 抗剪强度 抗渗透性 抗冲蚀能力 微观结构 |
| 收稿时间： | 2021-10-19 |
An experimental study of the engineering properties and erosion resistance of guar gum-reinforced loess |
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| Affiliation: | 1.Gansu Luqiao Highway Investment Co. Ltd., Lanzhou, Gansu 730030, China2.School of Geological Engineering and Geomatics, Chang’ an University, Xi’an, Shaanxi 710054, China3.Qingdao Zhongke Kuntai Intelligent Construction Research Institute, Qingdao, Shandong 266603, China4.School of Highway, Chang’an University, Xi’an Shaanxi 710064, China |
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| Abstract: | To reduce the erosion of the loess slope under the condition of rainstorms, the loess cured by guar gum is used to protect the slope surface. The engineering properties and erosion resistance of the guar gum-reinforced loess are studied by conducting the direct shear test, penetration test, slope scour test in simulated rainstorm, and the curing mechanism of guar gum is studied by contrasting the microstructure characteristics of plain loess and reinforced loess. The results show that the guar gum can effectively enhance the shear strength and the anti-permeability of loess. The cohesion and internal friction angle of the reinforced loess show the same trend, and they increase first and then decrease with the increasing guar gum content, and increase with the increasing curing age. The saturated permeability coefficient decreases with the increasing guar gum content and curing age. Compared with plain loess, the cohesion and internal friction angle of 7 d cured loess with 1.0% guar gum content increases by 53.7% and 5.6%, and the saturated permeability coefficient decreases by 78.3%. The slope protection effect of the guar gum-reinforced loess under rainstorm scour condition is obvious. Compared with the slope without protection, the cumulative scour amount of the slope decreases by 64.4%, and the average slope flow rate increases by 55.2%. The strengthening mechanism of guar gum on loess mainly lies in the high viscosity hydrogel produced by its hydration reaction to fill the pores and cement loess particles. This study provides test support for the application and promotion of the guar gum-reinforced loess in slope protection engineering. |
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