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山东大学学报 (工学版) ›› 2025, Vol. 55 ›› Issue (1): 117-124.doi: 10.6040/j.issn.1672-3961.0.2023.302

• 土木工程 • 上一篇    下一篇

基于低pH一相注浆法的微生物固化土体试验研究

崔广芹,张航*,朱巩硕,张成志,公衍德   

  1. 内蒙古科技大学土木工程学院, 内蒙古 包头 014010
  • 出版日期:2025-02-20 发布日期:2025-02-20
  • 作者简介:崔广芹(1985— ),女,山东菏泽人,讲师,工程师,博士,主要研究方向为城市地下空间与工程. E-mail:sdcuican@163.com. *通信作者简介:张航(1997— ),男,河南商丘人,硕士研究生,主要研究方向为微生物岩土工程. E-mail:1518305925@qq.com
  • 基金资助:
    内蒙古科技大学建筑科学研究所开放基金资助项目(JYSJJ-2021Q03)

Experimental study on microbial solidification of soil based on low pH one-phase grouting method

CUI Guangqin, ZHANG Hang*, ZHU Gongshuo, ZHANG Chengzhi, GONG Yande   

  1. CUI Guangqin, ZHANG Hang*, ZHU Gongshuo, ZHANG Chengzhi, GONG Yande(College of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
  • Online:2025-02-20 Published:2025-02-20

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摘要： 针对微生物诱导碳酸钙沉淀(microbial induced calcite precipitation, MICP)技术在固化土体的过程中存在碳酸钙分布不均匀的问题,采用低pH一相注浆法对微生物固化土体试样过程中碳酸钙的分布情况开展试验研究。通过正交试验,确定最优培养方案为:pH=3.0、OD600=4.0、胶结液浓度cs=2.00 mol/L。基于最优注浆方案研究微生物固化土体试样中碳酸钙的分布情况和试样强度变化特性,并通过扫描电镜测试,观察固化试样的微观结构特征。结果表明:低pH一相注浆法有助于促进微生物反应过程中碳酸钙的均匀性分布,相较于两相注浆法,低pH一相注浆法固化试样的内摩擦角增大17.9%,黏聚力增大46.3%,压缩模量增大22.4%。

关键词: 微生物诱导碳酸钙沉淀, 注浆方法, 低pH, 土工试验, 微观结构

中图分类号: 

  • TU144.3
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