工程地质学报2025，Vol.33Issue(6)：2126-2137,12.DOI:10.13544/j.cnki.jeg.2025-0250
接触面积影响粗糙岩石节理MICP阻渗效果试验研究
EXPERIMENTAL STUDY ON THE INFLUENCE OF CONTACT AREA ON PERMEABILITY REDUCTION EFFECT OF MICP METHOD FOR ROUGH ROCK JOINT
摘要
Abstract
Although microbially induced carbonate precipitation(MICP)technology has been widely applied in soil reinforcement and seepage control,only limited research has explored its use in rock mass reinforcement and sealing projects.In particular,few studies have considered how the contact area within rock joints influences the permeability reduction achieved through MICP treatment.To address this gap,unmated granite rock joint specimens obtained from repeated direct shear tests were used as prototypes.Artificial rock joint specimens with varying initial contact area ratios were fabricated by combining laser scanning of surface morphology with 3D printing technology.Laboratory MICP experiments were then conducted on these specimens to examine the effect of contact area on permeability reduction.The experimental results reveal that the initial contact area governs the formation of the initial calcium carbonate deposition zone during the MICP sealing process,thereby influencing the final distribution of calcium carbonate.Notably,a distinct zone devoid of carbonate deposition was observed.Furthermore,the transmissivity of the rock joints exhibited a two-stage decline with MICP injection cycles:a rapid reduction after the first cycle,followed by a gradual decrease in subsequent cycles,eventually approaching zero.Based on the experimental data,an empirical linear relationship was established among transmissivity,final calcium carbonate diffusion area ratio,and initial contact area ratio.This expression can be used to preliminarily predict transmissivity and the final distribution of calcium carbonate during MICP-based sealing of rock joints.关键词
岩石力学/3D打印岩石节理/微生物诱导碳酸钙沉积(MICP)/接触面积/导水系数Key words
Rock mechanics/3D printed rock joint/Microbially induced carbonate precipitation(MICP)/Contact area/Transmissivity分类
建筑与水利引用本文复制引用
李双,李潇,钟建敏,朱占元,肖维民..接触面积影响粗糙岩石节理MICP阻渗效果试验研究[J].工程地质学报,2025,33(6):2126-2137,12.基金项目
国家自然科学基金项目(资助号:41877195).This research is supported by the National Natural Science Foundation of China(Grant No.41877195). （资助号:41877195）
