论文标题：Investigation on identification of structural anomalies from polluted data sets using an unsupervised learning method

期刊：Frontiers of Structural and Civil Engineering

作者：Junchen YE, Zhixin ZHANG, Ke CHENG, Xuyan TAN, Bowen DU, Weizhong CHEN

发表时间：15 Oct 2024

DOI：10.1007/s11709-024-1065-3

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爱思唯尔2024中国高被引作者

陈仁朋

教授、博士生导师

湖南大学

引用格式

Huai-Na WU, Lei LIU, Yuan LIU, Ren-Peng CHEN, Hai-Lin WANG, Shi-Qiang RUAN, Meng FAN. Weakening behavior of waterproof performance in joints of shield tunnels under adjacent constructions. Front. Struct. Civ. Eng., 2023, 17(6): 884–900 https://doi.org/10.1007/s11709-022-0912-3

摘要

盾构隧道作业对相邻建筑的频繁扰动会导致隧道衬砌变形和接缝渗漏，而地下水渗漏又会对隧道结构的安全性和耐久性构成严重威胁。因此，研究临近施工对衬砌防水性能的影响对于保护盾构隧道至关重要。本文探讨了临近施工引起盾构隧道接缝横向变形导致防水性能劣化特性。首先，通过精细化数值模拟，研究了三种典型临近施工（上部堆载、上部开挖和侧面开挖）下接缝开口与横向变形之间的关系。随后，建立了欧拉-拉格朗日接缝渗流耦合模型，分析了带有接缝开口的密封垫防水性能演变，量化了防水性能与接缝开口之间的关系，揭示了防水性能劣化规律。研究结果可为制定防水性能控制变形标准提供直接参考。

邻近建筑扰动下节段环的横向变形和渗漏：（a）上部荷载;（b）上部挖掘;（c）侧面开挖

Abstract

Groundwater leakage in shield tunnels poses a threat to the safety and durability of tunnel structures. Disturbance of adjacent constructions during the operation of shield tunnels frequently occurs in China, leading to deformation of tunnel lining and leakage in joints. Understanding the impact of adjacent constructions on the waterproofing performance of the lining is critical for the protection of shield tunnels. In this study, the weakening behavior of waterproof performance was investigated in the joints of shield tunnels under transverse deformation induced by adjacent construction. First, the relationship between the joint opening and transverse deformation under three typical adjacent constructions (upper loading, upper excavation, and side excavation) was investigated via elaborate numerical simulations. Subsequently, the evolution of the waterproof performance of a common gasket with a joint opening was examined by establishing a coupled Eulerian–Lagrangian model of joint seepage, and a formula describing the relationship between waterproof performance and joint opening was proposed. Finally, the weakening law of waterproofing performance was investigated based on the results of the aforementioned studies. It was determined that the joints with the greatest decline in waterproof performance were located at the tunnel shoulder in the upper loading case, tunnel crown in the upper excavation case, and tunnel shoulder in the side excavation case. When the waterproof performance of these joints decreased to 50% and 30%, the transverse deformations were 60 and 90 mm under upper loading, 90 and 140 mm under upper excavation, and 45 and 70 mm under side excavation, respectively. The results provide a straightforward reference for setting a controlled deformation standard considering the waterproof performance.

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https://journal.hep.com.cn/fsce/EN/10.1007/s11709-022-0912-3

2023年以前发表在FSCE期刊的论文

Renpeng CHEN, Pin ZHANG, Huaina WU, Zhiteng WANG, Zhiquan ZHONG. Prediction of shield tunneling-induced ground settlement using machine learning techniques. Front. Struct. Civ. Eng., 2019, 13(6): 1363–1378 https://doi.org/10.1007/s11709-019-0561-3

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