生物矿化结皮-有机物-固化小球缓释联合改性边坡客土水-力学特性

doi:10.3799/dqkx.2026.166

生物矿化结皮-有机物-固化小球缓释联合改性边坡客土水-力学特性

doi: 10.3799/dqkx.2026.166

1. 南京大学地球科学与工程学院, 南京 210023;
2. 浙江工正工程管理有限公司宁波高新区分公司, 宁波 315000

基金项目:

国家重点研发计划项目(NO.2023YFC3007102)

国家自然科学基金项目(NO.42477188、41925012、42230710、41902271)。

详细信息

作者简介:
泮晓华(1986-),男,副教授,主要从事微生物工程地质方面研究。E-mail:panxiaohua@nju.edu.cn

中图分类号: X171.4
计量
- 文章访问数: 25
- HTML全文浏览量: 0
- PDF下载量: 4
- 被引次数: 0
出版历程
- 收稿日期: 2025-08-31
- 网络出版日期: 2026-06-29

摘要

摘要: 本论文提出一种基于酶诱导氧化镁碳化（EIMC）技术的复合改性方法，通过室内冲刷试验对比研究了生物矿化结皮、有机物调控、EIMC固化小球缓释三者协同提升生态修复边坡客土水-力学特性的规律与作用机制。以碳化度、冲刷率和累计侵蚀量评估改性与抗侵蚀效果；用扫描电镜和纳米压痕技术分析微观结构和力学特性。结果表明，三者联合改性效果最优，冲刷率比单一EIMC处理降低77.9%，比空白组降低82.4%；在261 mm/24h降雨、冲刷100 min下，累计侵蚀量最低（9.84 g）。红薯淀粉通过调控成核、优化孔隙与稳定水化学环境，使碳化度提升2.5%，弹性模量提高43.4%。固化小球实现Mg²⁺缓释，促进深层碳化度提升3.6%，弹性模量提升132.6%。喷洒使得EIMC浆液在坡表快速形成致密结皮层，有效阻隔表面冲刷。
- EIMC /
- 生态修复 /
- 抗冲刷性能 /
- 碳化度 /
- 微观结构
Abstract: This paper proposes a composite modification method based on enzyme-induced magnesium carbonation (EIMC), integrating bio-crust formation, organic matter regulation, and Mg²⁺ slow-release effect from EIMC solidified ball. Through a standardized indoor erosion experiment, the laws and mechanisms of the three working together to enhance the hydro-mechanical stability of engineered soils used in ecological slope restoration were comparatively studied. Carbonation degree, erosion rate, and cumulative erosion amount were quantified to assess both the soil modification and its anti-erosion performance; micro-structural features and micro-scale mechanical properties were characterized using scanning electron microscopy (SEM) coupled with nanoindentation. Experimental results show that the combined modification of the three achieved the best effect. The erosion rate was 77.9% lower than that of the single EIMC treatment and 82.4% lower than that of the blank group. Under the condition of 261 mm/24h rainfall and 100 minutes of erosion, the cumulative erosion amount was the lowest (9.84 g). Sweet potato starch improves carbonation degree by 2.5% and elastic modulus by 43.4% via nucleation regulation, pore structure optimization, and stabilization of the aqueous chemical environment. EIMC solidified ball enable sustained Mg²⁺ release, enhancing deep-layer carbonation degree by 3.6% and elastic modulus by 132.6%. Spray application facilitates rapid in situ formation of a dense, continuous bio-crust layer on the slope surface—effectively suppressing surface rill erosion.
- EIMC /
- ecological restoration /
- anti-erosion performance /
- carbonation degree /
- microstructure

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