Hydro⁃Mechanical Properties of Slope External⁃Soil Modified by Combined Method of Bio⁃Crust, Organic Matter, and Slow⁃Release of EIMC Solidified Sand Particle Balls

Pan Xiaohua; Pan Guanghui; Tang Chaosheng; Yu Hangbo

doi:10.3799/dqkx.2026.166

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Hydro⁃Mechanical Properties of Slope External⁃Soil Modified by Combined Method of Bio⁃Crust, Organic Matter, and Slow⁃Release of EIMC Solidified Sand Particle Balls

更新时间：2026-10-15

- Hydro⁃Mechanical Properties of Slope External⁃Soil Modified by Combined Method of Bio⁃Crust, Organic Matter, and Slow⁃Release of EIMC Solidified Sand Particle Balls
- Earth Science Vol. 51, Issue 9, Pages: 3378-3390(2026)
- 作者机构：
  
  1.南京大学地球科学与工程学院，江苏南京 210023
  2.浙江工正工程管理有限公司宁波高新区分公司，浙江宁波 315000
- 作者简介：
- 基金信息：
- DOI：10.3799/dqkx.2026.166
  CLC： P642.5
- Received：31 August 2025，
  
  Published：30 September 2026
- 稿件说明：
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泮晓华，潘广慧，唐朝生，余航波，2026.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.地球科学，51（9）：3378-3390.

Pan Xiaohua，Pan Guanghui，Tang Chaosheng，Yu Hangbo，2026.Hydro⁃Mechanical Properties of Slope External⁃Soil Modified by Combined Method of Bio⁃Crust， Organic Matter， and Slow⁃Release of EIMC Solidified Sand Particle Balls.Earth Science，51（9）：3378-3390.
泮晓华，潘广慧，唐朝生，余航波，2026.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.地球科学，51（9）：3378-3390. DOI： 10.3799/dqkx.2026.166.

Pan Xiaohua，Pan Guanghui，Tang Chaosheng，Yu Hangbo，2026.Hydro⁃Mechanical Properties of Slope External⁃Soil Modified by Combined Method of Bio⁃Crust， Organic Matter， and Slow⁃Release of EIMC Solidified Sand Particle Balls.Earth Science，51（9）：3378-3390. DOI： 10.3799/dqkx.2026.166.

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/24 h降雨、冲刷100 min后，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%.固化小球可实现Mg²⁺缓释，促进深层碳化度提升3.6%，弹性模量提升132.6%.喷洒EIMC浆液使得坡表快速形成致密结皮层，有效阻隔表面冲刷.

Abstract

This paper proposes a combined modification method based on enzyme-induced magnesium carbonation (EIMC)

integrating bio-crust formation

organic matter regulation

and the Mg²⁺ slow-release effect from EIMC solidified balls. Through a standardized indoor erosion experiment

the laws and mechanisms of the three working together to enhance the hydro-mechanical stability of external-soil 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-sc

ale 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 enables sustained Mg

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 rain erosion.

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