| 王伟,王竑,沈文斌,郑晓彦,刘瑾,何承宗,车文越,陈志昊.C型聚合物改良边坡植被修复客土基材的强度特性试验研究[J].矿产勘查,2025,16(4):923-933 |
| C型聚合物改良边坡植被修复客土基材的强度特性试验研究 |
| Experimental study on strength characteristics of soil substrate for slope vegetation restoration improved by C-type polymer |
| 投稿时间：2022-09-23 |
| DOI：10.20008/j.kckc.202504022 |
| 中文关键词: 客土基材 高分子聚合物 三轴压缩试验 机理分析 |
| 英文关键词: soil base material high-molecular polymer triaxial compression test mechanism analysis |
| 基金项目:本文受江苏省地质矿产勘查局科研项目(2019KY13)与国家自然科学基金面上项目(41877212)联合资助。 |
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| 中文摘要: |
| 客土基材目前是矿山修复的主要手段，而基材强度是影响生态修复层稳定性的关键因素。为了提高生态基材的修复效果，本文选用 C型聚合物作为边坡生态基材改良剂，通过三轴强度试验并结合电镜扫描微观结构，分析聚合物改良土体强度特性和作用机理。研究发现:C型聚合物的掺入增加了试样的破坏应变，提高了试样的塑性，降低了试样弹性模量随围压的增加而减小的趋势；随着其掺量的增加，试样峰值偏应力和黏聚力显著，黏聚力最高达到了 197.74 kPa。扫面电镜结果显示聚合物与水反应形成的弹性凝胶有效地改变了黏性土的结构。凝胶的包裹性和黏结性增加了黏性土颗粒间的作用力；填充粒间孔隙，增加土体颗粒间的有效接触面积，使得土体试样的强度性能显著提高。 |
| 英文摘要: |
| As an ecological slope protection technology, vegetation slope protection is usually used in slope en-gineering to improve the stability of slope. In this paper, C type polymer was selected as an environmental friendlymaterial to improve the clay. Through triaxial strength test and electron microscope scanning microstructure, themechanism of the polymer improving the clay was analyzed. It is found that the addition of the polymer increases thefailure strain of the cohesive soil sample, improves the plasticity of the sample, and reduces the decreasing trend ofthe elastic modulus of the sample with the increase of the confining pressure; With the increase of its content, thepeak deviatoric stress and cohesion of the sample are significant, and the maximum cohesion reaches 197.74 kPa.The elastic gel formed by the reaction of the polymer and water can effectively change the structure of cohesive soil.The effect of the polymer gel on clay structure can be summarized as covering, wrapping and filling. The cohesion ofgel and particle wrapping increases the force between cohesive soil particles; Moreover, the inter-particle pores ofcohesive soil are filled, and the effective contact area between soil particles is increased, so that the cohesion of soilsamples is significantly improved. |
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