微生物诱导碳酸钙沉淀消除砂土液化的研究进展
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TU44

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国家自然科学基金(51468055);青海省自然科学基金(2012-Z-705);青海省重点实验室建设项目(2017-ZJ-Y30);青海省“135”人才工程项目(2017-RC-02)


Research advances of the elimination of sand liquefaction by microbial induced calcite precipitation
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    摘要:

    消除砂土地基振动液化问题一直是岩土工程研究的重要课题。微生物岩土工程技术是一种新兴的土体加固技术,通过低压技术向砂土地基中注入菌液和诱导液,最终快速析出方解石晶体,进而改善土体的抗液化能力。基于微生物矿化机理,本文总结了消除饱和砂土地基振动液化的原理和技术,重点对消除砂土液化的微生物矿化技术及其相关研究进展进行了归纳。在实验室条件下,该技术与传统消除饱和砂土地基液化的技术相比,微生物矿化后砂柱的抗液化能力显著提高;在实现提高土体抗液化能力的同时,具备绿色环保的优势。目前,该技术处于理论研究和初步实践阶段,仍需结合工程实践验证其可行性。还存在砂土固化效能不均匀、高产脲酶微生物不易保藏等问题有待进一步开展系统深入的研究。

    Abstract:

    The question of eliminate vibration liquefaction of sand foundation has been an important subject in geotechnical engineering research. Microbial geotechnical engineering technology is an emerging soil reinforcement technology. It adopts low-pressure technology to inject bacteria liquid and induction liquid into the sandy soil foundation to quickly precipitate calcite crystals, thereby improving the ability of soil to resist liquefaction. Based on the mechanism of microbial mineralization, the principles and techniques for eliminating vibration liquefaction of saturated sand foundations are summarized in this paper, with the focus on the microbial mineralization technology to eliminate sand liquefaction and its related research progress. Under laboratory conditions, this technology has significantly improved the anti-liquefaction ability of the sand pillar after microbial mineralization compared with the traditional technology for eliminating saturated sand-based liquefaction, It can protect the environment while improving the anti-liquefaction ability of the soil. At present, this technology is in the state of theoretical research and preliminary practice,and its feasibility needs to be verified with engineering. There are also complications such as uneven sand solidification efficiency and difficult preservation of high-yield urease microorganisms that require further systematic and in-depth research.

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侯福星,张文,赵媛,等. 微生物诱导碳酸钙沉淀消除砂土液化的研究进展[J]. 科学技术与工程, 2021, 21(23): 9664-9670.
Hou Fuxing, Zhang Wen, Zhao Yuan, et al. Research advances of the elimination of sand liquefaction by microbial induced calcite precipitation[J]. Science Technology and Engineering,2021,21(23):9664-9670.

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  • 收稿日期:2020-11-16
  • 最后修改日期:2021-05-18
  • 录用日期:2021-04-06
  • 在线发布日期: 2021-08-31
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