School of Civil Engineering, Architecture and the Environment, Hubei University of Technology
Hubei En⁃gineering Research Center of Bridge Safety Monitoring Technology and Equipment Technology

目的目的为缓解传统电渗法加固软黏土过程中土体开裂和不均匀沉降等问题,改善软黏土的工程性质,提出微生物诱导碳酸钙沉淀(MICP)技术联合玄武岩纤维加筋优化电渗法处理效果。方法方法通过开展软黏土室内电渗模型试验,分析电渗过程中的排水量、电流强度和有效电阻,以及电渗处理后土体表面沉降量、含水率、抗剪强度和pH,结合SEM图像探究不同掺量的玄武岩纤维以及MICP-玄武岩纤维联合作用机制对电渗加固效果的影响机理。结果结果结果表明:(1)不同掺量的玄武岩纤维对电渗效果影响差异显著,纤维加入软黏土后可抑制电渗过程中的土体裂缝发展与电流衰减,掺量为0.4%的试验组最佳效果;(2)MICP技术与玄武岩纤维加筋的联合使电渗过程变得更加均衡与顺畅,有效改善了电渗固结排水导致的土体表面不均匀沉降;(3)在电渗过程中,MICP反应在土颗粒与纤维表面上生成的碳酸钙沉淀填充加固了土体,提升了土体强度均匀性;(4)MICP技术的加入在提升土体强度的同时减少了土体孔隙液的排出,降低了废液处理的压力,具有更高的环境适应性。结论结论该研究结果为提升电渗法加固软黏土地基的处理效果提供了新思路,拓展了加固软黏土方法新的可能性。

Objectives To address issues such as soil cracking and uneven settlement associated with the tra‑ditional electro-osmosis method for soft clay reinforcement and to improve the engineering properties of soft clay, this study proposes a method that combines microbial-induced calcium carbonate precipitation (MICP) technology with basalt fiber reinforcement to optimize the electro-osmosis treatment effect. Methods Laboratory electro-osmotic model tests were conducted on soft clay. The study analyzed drainage volume, current intensity, and effective resistance during the electro-osmosis process, as well as surface settlement, moisture content, shear strength, and pH value of the soil after treatment. Scanning electron microscopy (SEM) images were also utilized to investigate the mechanisms underlying the effects of varying basalt fiber contents and the combined influence of MICP technology and basalt fiber on reinforcement performance. Re⁃sults The findings indicate that: (1) The effect of basalt fiber content on the electro-osmosis process varies significantly. Adding fibers to soft clay mitigates soil cracking and current attenuation during electro-osmosis, with the optimal performance observed at a fiber content of 0.4%. (2) The integration of MICP technology and basalt fiber reinforcement enhances the uniformity and smoothness of the electro-osmosis process, effectively reducing uneven surface settlement caused by electro-osmotic consolidation and drainage. (3) During electro-osmosis, calcium carbonate precipitates formed by the MICP reaction on the surfaces of soil particles and fibers fill and strengthen the soil matrix, thereby improving the uniformity of soil strength. (4) The application of MICP technology not only increases soil strength but also reduces pore water dis‑charge, alleviating the burden of wastewater treatment and demonstrating higher environmental adaptability. Conclusions This study proposes a novel approach to enhance the effectiveness of electro-osmosis for soft clay foundation reinforcement, offering new possibilities for stabilizing soft clay.

国家自然科学基金资助项目(52078195);国家自然科学基金联合基金重点资助项目(U22A20232)

胡其志,陈禹龙,刘一鸣,等.MICP纤维加筋优化电渗法加固软黏土的试验研究[J].河南理工大学学报(自然科学版),2025,44(1):166‑175.

HU Q Z, CHEN Y L, LIU Y M, et al. Experimental study on the strengthening of soft clay using MICP with fiber-reinforced optimization in the electro-osmotic method[J]. Journal of Henan Polytechnic University (Natural Science),2025,44(1): 166-175.