中文核心期刊
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中国科技核心期刊
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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2026, Vol. 45 ›› Issue (7): 42-49.DOI: 10.3969/j.issn.1674-0696.2026.07.05

• 智慧交通基础设施 • 上一篇    

高聚物注浆材料在混凝土裂缝中挤压流动扩散过程研究

李鑫鑫1，罗航1，陈熹2，郑丹1，方宏远3   

  1. (1. 重庆交通大学 河海学院, 重庆 400074; 2. 嘉兴大学 建筑工程学院，浙江 嘉兴 314001； 3. 郑州大学 水利与交通学院，河南 郑州 450001)
  • 收稿日期:2025-10-23 修回日期:2026-05-15 发布日期:2026-07-21
  • 作者简介:李鑫鑫(1985—)，男，湖北宜昌人，教授，博士，主要从事混凝土断裂力学方面的研究。E-mail：xinxinli@cqjtu.edu.cn 通信作者：郑丹(1979—)，男，重庆人，教授，博士，主要从事混凝土断裂力学方面的研究。E-mail：zhengdan@cqjtu.edu.cn
  • 基金资助:
    国家自然科学基金项目(52479116)；重庆水利科技重点项目(CQSLK-2024008)

Extrusion flow and diffusion process of high polymer grouting material in concrete cracks

Li Xinxin1, Luo Hang1, Chen Xi2, Zheng Dan1, Fang Hongyuan3   

  1. (1. College of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. School of Civil Engineering, Jiaxing University, Jiaxing 314001, Zhejiang, China; 3. School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, Henan, China)
  • Received:2025-10-23 Revised:2026-05-15 Published:2026-07-21

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摘要： 高聚物注浆防渗加固技术近年来被广泛应用于地下混凝土结构的渗漏和沉降修复中，自膨胀高聚物注浆材料在混凝土裂缝中的流动扩散规律对注浆参数的确定至关重要。现有研究尚未明确高聚物在不同粗糙度裂缝中的扩散固化过程。基于此，采用相场法构建了考虑高聚物黏度时变特性与裂缝粗糙度的自膨胀高聚物流动扩散模型。研究发现：粗糙度对扩散及应力响应影响显著，当Z2≥0.195时，裂缝应力与变形出现突增，可将Z2=0.195视为高聚物流动扩散与裂缝力学响应转变的临界阈值，低于该值时浆液扩散接近平行板模型，超过该值后，应力集中和局部损伤明显增强；当注浆速度为5 mm/s时，Z2=0.413的粗糙裂缝最大位移较平滑裂缝增大48.7%，流体压力达1.07×105 Pa；不同裂缝剖面对比表明，Z2越大，损伤产生越早、扩展越快，L4较L3提前0.7 s出现损伤，并在约2.63 s达到完全破坏，应力增幅达226.2%。

关键词: 岩土工程；注浆；高聚物；相场方法；混凝土；粗糙度

Abstract: High polymer grouting technology for seepage control and reinforcement has been widely applied to the leakage and settlement repair of underground concrete structures in recent years. The flow and diffusion rule of self-expanding high polymer grouting material in concrete cracks is crucial for determining grouting parameters. However, the diffusion and solidification processes of high polymers in cracks with different roughness levels have not yet been clearly defined. Based on this, a self-expanding high polymer diffusion model considering the time varying viscosity characteristics and crack roughness of high polymers was established by the phase-field method. The research results show that crack roughness has a significant effect on polymer diffusion and stress response. When Z2≥ 0.195, crack stress and deformation increase sharply, indicating that Z2=0.195 can be regarded as the critical threshold for the transition of high polymer flow diffusion and crack mechanical response. Below this threshold, slurry diffusion is close to that of the parallel-plate model; above it, stress concentration and local damage are significantly intensified. At a grouting velocity of 5 mm/s, the maximum displacement of the rough crack with Z2=0.413 is 48.7% higher than that of the smooth crack, and the fluid pressure reaches 1.07×105 Pa. Comparisons among different crack profiles show that the larger the Z2, the earlier and faster the damage occurs and spreads. Compared with L3, L4 occurs damage 0.7 s earlier and reaches complete destruction in approximately 2.63 seconds, with a stress increase of 226.2%.

Key words: geotechnical engineering; grouting; high polymer; phase-field method; concrete; roughness

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