Microbial desaturation experimental study of calcareous sand based on yeasts

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2025-03-07 DOI:10.1007/s10064-025-04195-1

Xiao Xie, Yumin Chen, Yi Han, Saeed Sarajpoor, Junwei Guo

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引用次数: 0

Abstract

Microbial induced desaturation and precipitation (MIDP) has been proven to be an environmental-friendly and reliable method for liquefaction mitigation. This study further explored MIDP with yeasts that had better performance for soil desaturation. First, the growth characteristics of two kind of yeasts were analyzed. Then the gas production ability of yeasts was measured by drainage method. Finally, the shaking table test was conducted to investigate the liquefaction mitigation effect. The results showed that the yeast anaerobic gas production reaction can reduce the saturation degree of calcareous sand from 100% to 86.76%. In the shaking table test, bacterial solution of 4% sucrose content achieved the best desaturation effect, the saturation degree of the bottom layer could be reduced to 59.9%. The excess pore pressure ratio of the soil at the different depths had a decreasing trend. The change of soil shear wave velocity changes was tested after desaturation, and found that the shear wave velocity increased from 10 m/s to 70 m/s with a regularity as the saturation degree decreased. The results of this study provided a new perspective on yeast in calcareous sand desaturation.

查看原文本刊更多论文

微生物诱导脱饱和沉淀法（MIDP）已被证明是一种环保、可靠的液化缓解方法。本研究利用在土壤脱饱和方面性能更好的酵母菌进一步探索了微生物诱导脱饱和沉淀法。首先，分析了两种酵母菌的生长特性。然后用排水法测定了酵母菌的产气能力。最后，通过振动台试验研究了液化缓解效果。结果表明，酵母厌氧产气反应可将石灰砂的饱和度从 100%降至 86.76%。在振动台试验中，蔗糖含量为 4% 的细菌溶液的脱饱和效果最好，底层饱和度可降至 59.9%。不同深度土壤的过剩孔隙压力比呈下降趋势。测试了脱饱和后土壤剪切波速的变化，发现随着饱和度的降低，剪切波速有规律地从 10 m/s 增加到 70 m/s。该研究结果为钙质砂脱饱和过程中的酵母提供了一个新的视角。

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.