岩土力学 ›› 2026, Vol. 47 ›› Issue (7): 2224-2234.doi: 10.16285/j.rsm.2025.0730CSTR: 32223.14.j.rsm.2025.0730

• 基础理论与实验研究 • 上一篇    下一篇

丁香假单胞菌作用下高温冻土-混凝土界面强化机制研究

唐丽云1，许森军1，郑娟娟1，郑建国2，林战举3，杜晓奇1，邱培勇1   

  1. 1．西安科技大学 建筑与土木工程工程学院，陕西 西安 710054；2．机械工业勘察设计研究院有限公司，陕西 西安 710043； 3．中国科学院西北生态环境资源研究院，甘肃 兰州 730000
  • 收稿日期:2025-07-14 接受日期:2025-12-11 出版日期:2026-07-13 发布日期:2026-07-08
  • 作者简介:唐丽云，女，1977年生，博士，教授，博士生导师，主要从事冻土及岩土工程等方面的教学与科研工作。E-mail: tangly@xust.edu.cn
  • 基金资助:
    国家自然科学基金项目（No.42271144）；陕西省秦创原“科学家+工程师”队伍建设项目（No.2022KXJ-086）

Strengthening mechanism of warm frozen soil-concrete interface under the action of Pseudomonas syringae

TANG Li-yun1, XU Sen-jun1, ZHENG Juan-juan1, ZHENG Jian-guo2, LIN Zhan-ju3, DU Xiao-qi1, QIU Pei-yong1   

  1. 1.School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, China; 2. China Jikan Research Institute of Engineering Investigation and Design Co., Ltd., Xi’an, Shaanxi 710043, China; 3. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
  • Received:2025-07-14 Accepted:2025-12-11 Online:2026-07-13 Published:2026-07-08
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (42271144) and Shaanxi Province Qin Chuangyuan “Scientist+Engineer” Team Construction Project (2022KXJ-086).

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摘要：

随全球气温升高，高温冻土-混凝土界面冰晶易消融，导致冰胶结力下降，进而引起界面强度劣化，影响基础设施的稳定性。丁香假单胞菌（Pseudomonas syringae，简称P. syringae）可诱导水分子有序排列，从而促进冰晶在高温下生长。然而，将其用于高温冻土-混凝土界面促生冰膜进而增强界面强度的研究尚属空白。为此，开展核磁共振和直剪试验，研究不同P. syringae浓度（0、1 g/L）对温度为0、−0.5、−1.0 ℃下高温冻土-混凝土界面剪切应力-水平位移曲线、剪切强度及强度指标的影响。添加P. syringae后，冻土含冰量增加了38%，界面黏聚力提高了29.1%，界面强度增加了19%，残余强度提升了7%。基于摩尔-库仑准则和广义达西定律，将P. syringae作用下的高温冻土-混凝土界面强化机制概括为P. syringae随水分迁移至界面处富集，在较高温度下诱导冰晶生成，进而填充孔隙，最终实现界面互锁增强，显著提升界面强度。首次揭示了P. syringae在增强高温冻土-混凝土界面强度中的潜力，为P. syringae运用于高温冻土区基础设施的设计与施工提供了理论支持。

关键词: 高温冻土-混凝土界面, 丁香假单胞菌, 摩尔-库仑准则, 冰胶结力

Abstract:

With the increase of global temperature, the ice crystals at the warm frozen soil-concrete interface are easy to melt, resulting in the decrease of ice cementation force, which in turn leads to the deterioration of interface strength and affects the stability of infrastructure. Pseudomonas syringae (P. syringae) can induce the orderly arrangement of water molecules to promote the growth of ice crystals at elevated temperatures. However, research regarding its application in promoting ice film formation at the warm frozen soil-concrete interface and further enhance the interface strength remains notably absent. Therefore, in this paper, nuclear magnetic resonance and direct shear tests were carried out to study the effects of P. syringae concentrations (0, 1 g/L) on the shear stress-horizontal displacement curve, shear strength and strength index of warm frozen soil-concrete interface at 0,−0.5 ℃ and−1 ℃. After the addition of P. syringae, the ice content of frozen soil increased by 38 %, the interfacial cohesion improved by 29.1 %, the interfacial strength increased by 19 %, and the residual strength enhanced by 7 %. Based on the Mohr-Coulomb criterion and the generalized Darcy 's law, the strengthening mechanism of the warm frozen soil-concrete interface under the action of P. syringae can be summarized as follows: the enrichment of P. syringae occurs due to the migration of water towards the interface, which subsequently induces the formation of ice crystals at relatively elevated temperatures. These ice crystals then then fills the pores, ultimately leading to interface interlocking enhancement and a significant improvement in interface strength. This study initially unveils the potential of P. syringae in augmenting the strength of warm frozen soil-concrete interface, thereby offering theoretical underpinnings for the application of P. syringae in the design and construction of infrastructure in warm frozen soil areas.

Key words: warm frozen soil-concrete interface, Pseudomonas syringae, interface ice film, ice bond strength

中图分类号: TU 445
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