Volume 36, Issue 3 pp. 482-497
RESEARCH ARTICLE

A Sustainable Solution Using Ice Nucleation Active Bacteria to Enhance the Strength of Permafrost Under Climatic Warming

Juanjuan Zheng

Juanjuan Zheng

School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an, China

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Liyun Tang

Corresponding Author

Liyun Tang

School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an, China

State Key Laboratory of Road Engineering Safety and Health in High-Altitude Regions, CCCC First Highway Consultants Co. Ltd, Xi'an, China

Correspondence:

Liyun Tang ([email protected])

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Jianguo Zheng

Jianguo Zheng

China Jikan Research Institute of Engineering Investigations and Design Co. Ltd., Xi'an, China

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Peiyong Qiu

Peiyong Qiu

School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an, China

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Li Han

Li Han

School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an, China

Geological Resources and Geological Engineering Postdoctoral Research Mobile Station, Xi'an University of Science and Technology, Xi'an, China

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Gaosen Zhang

Gaosen Zhang

State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China

Key Laboratory of Extreme Environmental Microbial Resources and Engineering, Lanzhou, China

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Hui Peng

Hui Peng

State Key Laboratory of Road Engineering Safety and Health in High-Altitude Regions, CCCC First Highway Consultants Co. Ltd, Xi'an, China

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Haibin Li

Haibin Li

School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an, China

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Yongtang Yu

Yongtang Yu

China United Northwest Institute for Engineering Design & Research Co. Ltd, Xi'an, China

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Hailiang Jia

Hailiang Jia

School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an, China

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First published: 28 April 2025

Funding: This work was supported by the National Natural Science Foundation of China (42271144, 42071100), Department of Science and Technology of Shaan (2022KXJ-086), and China Communications Construction (2022-ZJKJ-PTJS07).

ABSTRACT

Climatic warming accelerates permafrost ice thawing, resulting in ground subsidence and subsequent loss of load-bearing capacity. Compensating the loss of ice content by using ice nucleation active (INA) bacteria in permafrost can be efficient to solve this problem. However, the performance and work mechanism of INA bacteria catalyzing ice formation in permafrost under climatic warming remain unclear. Therefore, the effect of INA bacterium Pseudomonas syringae on the ice formation and shear strength of frozen soil is investigated by conducting nuclear magnet resonance (NMR) and direct shear tests. The unfrozen water content and the shear strength of specimens with P. syringae concentrations of 0–20 g/L under temperatures ranging from −5°C to −0.1°C are measured and compared. The classic nucleation theory is used to illustrate the work mechanism of P. syringae in permafrost. Results indicate that P. syringae can significantly increase the shear strength of frozen soil by 13%–64% during soil thawing. The enhanced shear strength is attributed to the ice-bonding cohesion at temperatures from −5°C to −1°C, and the internal friction angle from −0.5°C to −0.1°C. Adding P. syringae with a concentration of 1 g/L can slow down the permafrost warming rate and maintain the unfrozen water content at a constant value. P. syringae exhibits higher ice-triggering ability near 0°C resulting from the decreased nucleation barrier during soil thawing. Using INA bacteria provides a sustainable solution to deal with permafrost warming and thawing, and the resulting landform changes and structural instability.

Conflicts of Interest

The authors declare no conflicts of interest.

Data Availability Statement

The data used to support the findings of this study are available from the corresponding author upon request.

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