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隧道建设(中英文) ›› 2025, Vol. 45 ›› Issue (9): 1664-1683.DOI: 10.3973/j.issn.2096-4498.2025.09.005

• 研究与探索 • 上一篇    下一篇

Corrosion Resistance of Curtain Grouting Reinforcement Rings in Submarine Tunnels(海底隧道帷幕注浆加固圈抗侵蚀研究)

邓嘉1, 2, 张庆松1, 2, *, 刘亚南1, 2, 刘衍凯1, 2   

  1. (1. 山东大学 隧道工程灾变防控与智能建养全国重点实验室, 山东 济南 250061; 2. 山东大学岩土与地下工程研究院, 山东 济南 250061)
  • 出版日期:2025-09-20 发布日期:2025-09-20
  • 作者简介:邓嘉(1999—),男,山东青岛人,2024年毕业于北京工业大学,岩土工程专业,硕士,助理研究员,现从事隧道与地下工程灾害防治方向的科研工作。 E-mail: tomdengjia1999@sdu.edu.cn。 *通信作者: 张庆松, E-mail: zhangqingsong@sdu.edu.cn。

Corrosion Resistance of Curtain Grouting Reinforcement Rings in Submarine Tunnels

DENG Jia1, 2, ZHANG Qingsong1, 2, *, LIU Yanan1, 2, LIU Yankai1, 2   

  1. (1. State Key Laboratory for Tunnel Engineering, Shandong University, Jinan 250061, Shandong, China; 2. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, Shandong, China)
  • Online:2025-09-20 Published:2025-09-20

摘要: 为研究海水侵蚀条件下隧道半帷幕注浆加固圈长期稳定性,首先,基于菲克第二定律和美国Life-365标准设计程序,设计适用于离子侵蚀的加速室内试验方法,通过调控表面离子质量分数与养护温度,实现在较短时间内重现注浆加固体长期受侵蚀过程中的性能演化;其次,通过离子侵蚀条件下注浆加固体抗压性能试验,建立基于等效厚度的加固体性能折减方法和基于损伤因子的加固体耐久性预测模型,提出厚度折减方程和损伤演变方程,建立基于损伤因子的加固体损伤破坏准则,用以评估加固圈在长期服役过程中的劣化风险;最后,建立考虑材料劣化过程的多物理场耦合模型,将厚度折减方程和损伤演变方程嵌入,开展青岛地铁13号线海底隧道典型富水砂层段半帷幕注浆加固圈在80年服役周期内的应力、变形及渗透压演化规律模拟分析。结果表明: 海水离子对结构内部的侵蚀为全方位侵入,隧道服役60年左右时,注浆加固圈及衬砌呈现出明显的变形和应力变化,衬砌拱顶、拱脚和注浆加固圈拱肩为保证海底隧道抗侵蚀长期服役的关键位置。

关键词: 海底隧道, 加速离子侵蚀, 侵蚀劣化, 长期稳定性, 注浆加固圈

Abstract: To investigate the long-term stability under marine ion erosion of the semi-curtain grouting reinforcement zone in submarine tunnels, an accelerated laboratory testing method was first developed based on Fick′s second law of diffusion and the Life-365 standard design protocol. By adjusting the surface ion concentration and curing temperature, the long-term deterioration of grouted material under seawater ion intrusion was effectively reproduced within the duration of a short experiment. Subsequently, a series of uniaxial compression tests under ion erosion conditions were conducted to quantify the deterioration characteristics of grouted specimens having varying water-cement ratios. Based on the concept of equivalent thickness reduction and damage evolution, a performance degradation model and a durability prediction model were established. A thickness reduction equation and a damage evolution equation were proposed, and a damage-based failure criterion was developed to assess the long-term risk of deterioration in the reinforcement zone. Finally, a multiphysics coupling model that considers material deterioration was established using COMSOL Multiphysics software. The proposed thickness reduction and damage evolution models were embedded to simulate the evolution of stress, deformation, and pore pressure in the semi-curtain grouting reinforcement zone of a typical water-rich sandy section of the Qingdao metro line 13 over an 80-year service period. The results indicate that seawater ions penetrate the structure omnidirectionally, rather than strictly from the exterior inward. At approximately 60 years of service, significant deformation and stress redistribution occur in both the grouting zone and the tunnel lining. The lining crown, invert, and the shoulder region of the grouting zone are identified as areas critical to the long-term durability of submarine tunnels subject to marine erosion.

Key words: submarine tunnel, accelerated ion erosion, erosion and deterioration, long-term stability, grouting reinforcement ring