土木与环境工程学报（中英文）2026，Vol.48Issue(3)：41-47,7.DOI:10.11835/j.issn.2096-6717.2025.012
基于大型三轴试验的原位激发微生物矿化加固土剪切特性研究
Shear characteristics of biostimulated MICP-treated soil based on large-scale triaxial tests
摘要
Abstract
As a novel environmentally friendly reinforcement method,the microbially induced carbonate precipi-tation(MICP)reinforcement technique has developed rapidly in recent years.The traditional MICP reinforce-ment method is limited by high reinforcement cost,poor environmental adaptability of exogenous mineralizing bacteria,and potential risks associated with the introduction of exogenous bacteria.The biostimulated MICP method using indigenous urease bacteria contained in soil can effectively reduce reinforcement cost and potential risks.In this paper,the biostimulated MICP method was used to reinforce the soil,and large-scale triaxial con-solidation drained shear tests were carried out on specimens before and after treatment to compare and analyze the shear characteristics of the treated and untreated specimens.Moreover,the distribution and reinforcement mechanism of calcium carbonate in the biotreated soil specimen were also investigated.The results show that the biostimulated MICP treatment primarily generates rhombohedral-shaped calcium carbonate,which is depos-ited in the soil,leading to a significant increase in strength and stiffness,as well as a significant reduction in vol-umetric strain.The content of calcium carbonate in the soil specimen decreases with the increase of specimen depth,which leads to shear failure at the bottom of the specimen.关键词
微生物诱导碳酸钙沉淀/土体加固/原位激发/大型三轴试验/剪切特性/碳酸钙分布Key words
microbially induced carbonate precipitation(MICP)/soil reinforcement/biostimulation/large-scale triaxial test/shear characteristics/calcium carbonate distribution分类
建筑与水利引用本文复制引用
李坤瑶,赵航行,杨文保,赵子华,崔昊,肖杨..基于大型三轴试验的原位激发微生物矿化加固土剪切特性研究[J].土木与环境工程学报（中英文）,2026,48(3):41-47,7.基金项目
国家自然科学基金(52078085) Foundation item:National Natural Science Foundation of China(No.52078085) （52078085）
