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纳米硅基固沙材料加固机理及抗冲蚀试验研究

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袁进科, 裴钻, 杨森林, 余浩, 胡孝洪, 刘海. 纳米硅基固沙材料加固机理及抗冲蚀试验研究[J]. 水文地质工程地质, 2023, 50(6): 80-89. doi: 10.16030/j.cnki.issn.1000-3665.202210019
引用本文: 袁进科, 裴钻, 杨森林, 余浩, 胡孝洪, 刘海. 纳米硅基固沙材料加固机理及抗冲蚀试验研究[J]. 水文地质工程地质, 2023, 50(6): 80-89. doi: 10.16030/j.cnki.issn.1000-3665.202210019
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YUAN Jinke, PEI Zuan, YANG Senlin, YU Hao, HU Xiaohong, LIU Hai. An experimental study of the reinforcement mechanism and erosion resistance of nano silicon-based sand-fixation material[J]. Hydrogeology & Engineering Geology, 2023, 50(6): 80-89. doi: 10.16030/j.cnki.issn.1000-3665.202210019
Citation: YUAN Jinke, PEI Zuan, YANG Senlin, YU Hao, HU Xiaohong, LIU Hai. An experimental study of the reinforcement mechanism and erosion resistance of nano silicon-based sand-fixation material[J]. Hydrogeology & Engineering Geology, 2023, 50(6): 80-89. doi: 10.16030/j.cnki.issn.1000-3665.202210019
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纳米硅基固沙材料加固机理及抗冲蚀试验研究

  • 1.

    地质灾害防治与地质环境保护国家重点实验室（成都理工大学），四川 成都　610059

  • 2.

    西藏自治区地质矿产勘查开发局第二地质大队, 西藏 拉萨　850007

  • 基金项目: 国家自然科学基金项目（41702318）；西藏地质勘查局科研项目（KJ-2021-04）
详细信息
    作者简介: 袁进科（1982-），男，博士，副教授，主要从事荒漠化防治研究工作。E-mail：yuanjingke@163.com
    通讯作者: 裴钻（1980-），男，博士，高级实验师，主要从事地质灾害防治研究。E-mail：27825683@qq.com

  • 中图分类号: TU441；X171.4

An experimental study of the reinforcement mechanism and erosion resistance of nano silicon-based sand-fixation material

  • 1.

    State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), Chengdu, Sichuan　610059, China

  • 2.

    Xizang Autonomous Region Geological and Mineral Exploration and Development Bureau Second Geological Unit, Lhasa, Xizang　850007, China

More Information

    摘要

  • 为了减少荒漠化地区沙坡在降雨冲蚀作用下坡体坍塌、水土流失的发生，以西藏雅鲁藏布江河谷分布的沙质边坡为研究对象，提出采用自主研发的纳米硅基固沙材料（nano-silicon/polymer composites，NSPC）对沙坡坡面进行防护。针对NSPC固沙材料加固沙体作用效果尚不明确，基于红外光谱、黏度测试、接触试验以及模拟沙坡降雨冲蚀试验，探讨NSPC固沙材料加固沙体的作用机理，研究降雨作用下NSPC固沙材料加固沙体的抗冲蚀能力。试验结果表明：NSPC固沙材料与沙粒通过聚合、胶结作用相互交叉缠绕、联结形成立体网状结构，从而达到加固沙体的目的；NSPC固沙材料的流变性在初始1 h内属于宾汉流体，后期逐渐转变为牛顿流体；NSPC固沙材料表面张力为60.31 mN/m，与沙体接触角为48.6°，黏附力为0.040 N/m，因此具有较强的入渗能力；沙坡表面形成的加固层对雨水冲蚀具有较强的阻滞效果，并且加固层还具有一定的保水能力。本研究可为NSPC固沙材料在荒漠化地区固沙防护工程中的应用及推广提供试验支撑。

    To reduce the slope collapse and soil erosion under the action of rainfall erosion in desertification areas, the self-developed nano silicon-based sand-fixation material (Nano-Silicon/

    Polymer Composites, NSPC) is proposed to protect the sandy slope surface of the Yarlung Zangbo River Valley in Xizang. In view of the unclear effect of NSPC sand-fixing material on strengthening sand body, based on infrared spectrum, viscosity test, contact test and simulated sandy slope rainfall erosion test, the mechanism of NSPC sand-fixation material to strengthen the sandy slope is discussed, and the anti-erosion ability of the NSPC sand-fixation material under the rainfall is studied. The results show that the NSPC sand-fixation material and sand particles cross and intertwine with each other through polymerization and cementation to form a 3D network structure, so as to achieve the purpose of strengthening the sandy body. The rheological properties of the NSPC sand-fixation material belongs to Bingham fluid in the first 1 h, and gradually changes to Newton fluid in the later period. The surface tension of the NSPC sand-fixation material is 60.31 mN/m, the contact angle with sandy body is 48.6°, and the adhesion force is 0.040 N/m, therefor it has strong infiltration ability. The reinforcement layer formed on the sandy slope surface has strong blocking effect on rainwater erosion, and the reinforcement layer also has water retention ability. This study provides test support for the application and promotion of the NSPC sand-fixation material in sand fixation and protection projects in desertification areas.
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  • 图 1  河谷分布的沙坡

    Figure 1. 

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    图 2  沙体颗粒级配曲线

    Figure 2. 

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    图 3  NSPC固沙材料

    Figure 3. 

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    图 4  冲刷试验模型装置示意图

    Figure 4. 

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    图 5  试验现场布置图

    Figure 5. 

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    图 6  NSPC固沙剂吸收光谱图

    Figure 6. 

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    图 7  不同时刻固沙材料黏度变化

    Figure 7. 

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    图 8  不同时刻固沙材料流变特征

    Figure 8. 

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    图 9  降雨下不同阶段坡面冲蚀过程

    Figure 9. 

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    图 10  沙粒体积含水率与时间关系

    Figure 10. 

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    图 11  沙坡冲蚀前后对比图

    Figure 11. 

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    图 12  NSPC固沙机理模型

    Figure 12. 

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    图 13  NSPC和沙粒结合示意图

    Figure 13. 

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收稿日期:  2022-10-10
修回日期:  2022-12-21
刊出日期:  2023-11-15

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