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微生物矿化加固砂土的试验研究

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近年来微生物诱导碳酸钙沉积(MICP)技术作为一种新型的绿色加固方法,得到了广泛研究,但传统的MICP固化方式注浆管法存在管口易堵塞且固化试样强度分布不均匀的问题,为改善MICP固化土体的强度分布不均匀性问题,利用巴士芽孢杆菌BNCC337394开展了使用新型柔性土工模具加固砂土的试验研究.通过对固化试样的CaCO3含量分布,无侧限抗压强度,试样的均匀性等方面进行分析,综合评价利用新型土工模具加固砂土的效果.结果表明:利用新型柔性土工模具固化砂土具有较好效果,经固化后的试样无侧限抗压强度可达3.07MPa,且固化试样均匀性良好.
Experimental study of microbial mineralization to strengthen sand
In recent years,microbial induced calcium carbonate deposition(MICP)technology,as a new green reinforcement method,has been widely studied,while the traditional MICP curing method grouting pipe method has the problems of easy blockage of the nozzle and uneven distribution BNCC337394 of solidification strength.Through the analysis of the CaCO3 content distribution,unconfined compressive strength,and uniformity of the solidified samples,the effect of using the new geomold to strengthen the sand was comprehensively evaluated.The results show that the new flexible geomold has a good effect on curing the sand,and the unconfined compressive strength of the cured specimen can reach 3.07MPa,and the uniformity of the cured specimen is good.

Microbially induced calcium carbonate precipitation(MICP)Visual navigation positioningStrengthUniformity

陈洪运、张尧、温琪

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河北建筑工程学院,河北张家口 075000

河北省寒冷地区交通基础设施工程技术创新中心,河北张家口 075000

微生物诱导碳酸钙沉积(MICP) 砂土固化 强度 均匀性

2024

河北建筑工程学院学报
河北建筑工程学院

河北建筑工程学院学报

影响因子:0.502
ISSN:1008-4185
年,卷(期):2024.42(1)
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