Deformation and control mechanism of MICP-treated expansive soil

WEI Ran; ZHANG Liya; XIAO Zhirui; YAN Jun; WANG Bo

doi:10.11779/CJGE2023S10050

Volume 45 Issue S1

Turn off MathJax

Article Contents

Abstract

References

Chinese Journal of Geotechnical Engineering > 2023 > 45(S1): 92-96. > DOI: 10.11779/CJGE2023S10050

WEI Ran, ZHANG Liya, XIAO Zhirui, YAN Jun, WANG Bo. Deformation and control mechanism of MICP-treated expansive soil[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S1): 92-96. DOI: 10.11779/CJGE2023S10050

Citation:

PDF (3253 KB)

Deformation and control mechanism of MICP-treated expansive soil

1.
Beihang University, Beijing 102206, China
2.
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100048, China
3.
Power China Construction Group Ltd, Beijing 100120, China

More Information

Received Date: July 05, 2023
Available Online: November 23, 2023

Graphical Abstract

Abstract

Abstract

Due to its strong hydrophilicity, the expansive soil will show significant volume expansion when soaked in water, which can cause hazard to the structures such as channels and embankments. Based on the capability of microbial induced calcite precipitation (MICP) to stabilize and improve the structure of soil body, the experimental and mechanism researches are conducted on the expansive soil treatment by Sporosarcina pasteurii through MICP. The results show that treating the expansive soil with Sporosarcina pasteurii can effectively suppress the swelling deformation of the expansive soil. The swelling inhibition can be up to 99.8% under the optimized microbial solution dosage. The free ions such as sodium, calcium, manganese and aluminum from the expansive soil mineral will form calcite particles through the reactions with the bacteria solution which can cement the soil particles, while the bacteria activities will induce the transformation of montmorillonite in the expansive soil into illite, which significantly inhibits the swelling capability and volume deformation of the expansive soil.
- expansive soil,
- MICP,
- deformation control,
- swelling mechanism

FullText(HTML)

References (8)

References

[1]	古家文. 浅析公路特殊土路基的病害及防治措施[J]. 四川建材, 2020, 46(9): 136-137. https://www.cnki.com.cn/Article/CJFDTOTAL-SCJZ202009079.htm Gu Jiawen. Analysis on diseases and prevention measures of highway special soil subgrade[J]. Sichuan Building Materials, 2020, 46(9): 136-137. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SCJZ202009079.htm
[2]	刘伟, 梁栋, 杨仲田, 等. 蒙脱石含量对膨润土膨胀行为影响的试验研究[J]. 辐射防护, 2018, 38(6): 511-516. https://www.cnki.com.cn/Article/CJFDTOTAL-FSFH201806016.htm LIU Wei, LIANG Dong, YANG Zhongtian, et al. Experimental study on influence of montmorillonite content on expansion behavior of bentonite[J]. Radiation Protection, 2018, 38(6): 511-516. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-FSFH201806016.htm
[3]	贾景超. 膨胀土膨胀机理及细观膨胀模型研究[D]. 大连: 大连理工大学, 2010. JIA Jingchao. Study on expansion Mechanism and Meso-Expansion Model of Expansive Soil[D]. Dalian: Dalian University of Technology, 2010. (in Chinese)
[4]	HOWER J, MOWATT T C. The mineralogy of illites and mixed-layer illite/montmorillonites[J]. American Mineralogist: Journal of Earth and Planetary Materials, 1966, 51(5/6): 825-854.
[5]	周张健. 蒙脱石伊利石化的控制因素、转化机制及其转化模型的研究综述[J]. 地质科技情报, 1994, 13(4): 41-46. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ404.008.htm ZHOU Zhangjian. Summary of the studyng for illitization of the smectite on its controlling factors, transformation mechanism and models[J]. Geological Science and Technology Information, 1994, 13(4): 41-46. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ404.008.htm
[6]	PETRY T M, ARMSTRONG J C. Stabilization of expansive clay soils[J]. Transportation Research Record, 1989(1219).
[7]	覃永富, 卢望, 袁梦祥, 等. 巨大芽孢杆菌改良邯郸强膨胀土试验研究[J]. 西南师范大学学报(自然科学版), 2020, 45(8): 87-95. https://www.cnki.com.cn/Article/CJFDTOTAL-XNZK202008013.htm QIN Yongfu, LU Wang, YUAN Mengxiang, et al. An experimental study of handan strong expansive soil enhanced by bacillus megaterium[J]. Journal of Southwest China Normal University (Natural Science Edition), 2020, 45(8): 87-95. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XNZK202008013.htm
[8]	NEUPANE S. Evaluating the Suitability of Microbial Induced Calcite Precipitation Technique for Stabilizing Expansive Soils[D]. Boise: Boise State University, 2016.