波浪作用下海底隧道氯离子侵蚀劣化时变分析

张治国; 叶铜; 朱正国; PanY T; 吴钟腾

doi:10.11779/CJGE20220513

波浪作用下海底隧道氯离子侵蚀劣化时变分析 English Version

张治国^{1, 2, 3, 4, 5,},
叶铜¹,
朱正国²,
PanY T⁵,
吴钟腾⁴

1.
上海理工大学环境与建筑学院, 上海 200093
2.
石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室, 河北石家庄 050043
3.
国家海洋局北海预报中心山东省海洋生态环境与防灾减灾重点实验室, 山东青岛 266061
4.
自然资源部丘陵山地地质灾害防治重点实验室, 福建省地质灾害重点实验室, 福建福州 350002
5.
新加坡国立大学土木与环境工程系, 新加坡 119077

基金项目:

国家自然科学基金项目 41977247

国家自然科学基金项目 42177145

山东省海洋生态环境与防灾减灾重点实验室课题 201703

省部共建交通工程结构力学行为与系统安全国家重点实验室课题 KF2022-07

自然资源部丘陵山地地质灾害防治重点实验室课题 FJKLGH2020K004

详细信息

作者简介:
张治国（1978—）男，博士，博士后，教授，博士生导师，主要从事岩土地下工程方面的研究工作。E-mail：zgzhang@usst.edu.cn

中图分类号: TU443
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出版历程
- 收稿日期: 2022-04-26
- 网络出版日期: 2023-02-23
- 刊出日期: 2023-06-30

Time-varying analysis of deterioration by chloride ion erosion for subsea tunnels under wave loads

ZHANG Zhiguo^{1, 2, 3, 4, 5,},
YE Tong¹,
ZHU Zhengguo²,
PAN Y T⁵,
WU Zhongteng⁴

1.
School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
2.
State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
3.
Shandong Provincial Key Laboratory of Marine Ecological Environment and Disaster Prevention and Mitigation, North Sea Marine Forecast Center of State Oceanic Administration, Qingdao 266061, China
4.
Key Laboratory of Geohazard Prevention of Hilly Mountains, Ministry of Natural Resources, Fujian Key Laboratory of Geohazard Prevention, Fuzhou 350002, China
5.
Department of Civil and Environmental Engineering, National University of Singapore, Singapore 119077

摘要

摘要: 浅水区海底隧道处于复杂波动水力环境中，既有理论研究一般只在静水环境中计入氯离子自由扩散对隧道衬砌的侵蚀作用，而较少考虑海洋波浪力对衬砌结构腐蚀的促进作用。首先采用适用于浅水区的Stokes二阶波浪理论确定了海床表面的波浪压力，基于Biot固结理论获得了隧道衬砌周围的水压响应；接着利用改进的Fick第二定律同时考虑水压和浓度梯度驱动下的氯离子扩散，并采用指数型强度劣化模型描述服役时间内衬砌混凝土的劣化效应；最后结合波浪作用下衬砌氯离子侵蚀效应进行了海底隧道衬砌承载力计算，并将理论解析解与数值模型和既有的试验结果进行了对比，获得了较好的一致性。结果表明，忽略动态波浪压力对衬砌混凝土中氯离子渗流的促进作用，将低估衬砌混凝土内部的氯离子扩散速度，随着波浪周期增加，衬砌内部氯离子侵蚀入渗的最大深度明显增大；而不考虑衬砌强度劣化效应会明显高估隧道结构的服役寿命，不利于海底隧道服役期间的安全储备。
- 海底盾构隧道 /
- Stokes二阶波 /
- 氯离子侵蚀 /
- 衬砌劣化 /
- 时变解析
Abstract: The subsea tunnel in shallow water is in a complex fluctuating hydraulic environment. The existing theoretical researches generally reckon in the corrosion effects of free diffusion of chloride ions on the tunnel linings in the hydrostatic environment, and seldom consider the promotion effects of ocean wave force on the corrosion of the lining structures. Firstly, the wave pressure on the seabed surface is determined by using the Stokes second-order wave theory which is suitable for the shallow water, and the hydraulic response around the tunnel linings is obtained based on the Biot consolidation theory. Then, the improved Fick's second law is used to consider the diffusion of chloride ions driven by the water pressure and concentration gradient, and the exponential strength deterioration model is used to describe the deterioration effects of lining concrete during service time. Finally, considering with the erosion effects of chloride ions under wave action, the bearing capacity of the linings of the subsea tunnel is calculated. The theoretical solution for this study is compared with the numerical models and existing test results, and the solutions are in good agreement. The results show that when the promoting effects of the dynamic wave pressure on chloride ion seepage in lining concrete are neglected, the diffusion velocity of chloride ions in lining concrete will be underestimated. With the increase of wave period, the maximum depth of erosion infiltration of chloride ions inside the lining increases significantly. Without considering the deterioration effects of lining strength, the service life of tunnel structures will be obviously overestimated, which is not conducive to the safety reserve of subsea tunnel during service.
- subsea shield tunnel /
- Stokes second-order wave /
- chloride ion erosion /
- lining deterioration /
- time-varying analysis

HTML全文

图 1 波浪动压作用下隧道衬砌氯离子侵蚀模型

Figure 1. Chloride ion erosion model for tunnel linings under wave dynamic pressure

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图 2 水压作用下离子侵蚀计算模型

Figure 2. Computational model for ion erosion under water pressure

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图 3 衬砌截面计算模型

Figure 3. Computational model for lining section

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图 4 试验值与理论值对比

Figure 4. Comparison between test and theoretical values

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图 5 波浪-海床数值模型及验证

Figure 5. Numerical model for wave-seabed and verification

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图 6 海床-隧道数值模型及验证

Figure 6. Numerical model for seabed-tunnel and verification

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图 7 隧道衬砌-氯离子侵蚀数值模型及验证

Figure 7. Numerical model for chloride ion erosion of tunnel linings and verification

下载: 全尺寸图片幻灯片

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