Failures in loess slope-tunnel system: An overview of trigging sources, acting mechanism and mitigation strategies

IF 4.4 2区 工程技术 Q1 ENGINEERING, MECHANICAL
Yiwen Qin , Yuhua Chen , Jinxing Lai , Junling Qiu , Zhichao Wang , Tong Liu , Wenbo Zan
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引用次数: 1

Abstract

A profound understanding of the interaction between loess slopes and tunnels, along with the mastery of protective measures for tunnels crossing loess slopes, is crucial for ensuring the excavation and operation safety of tunnels in loess slope areas. This article summarizes research findings on the loess slope-tunnel system, concentrating on sources triggering failures, the acting mechanism of failures, and strategies for failure mitigation. Loess slopes, serving as the tunnel's bearing medium, may suffer from engineering disturbances during construction and operation, significantly affecting their stability. This is reflected in the intensification of crack formation, water infiltration, and vibration propagation in the slope. The degree of slope-tunnel interaction depends on relative spatial positioning, slope characteristics, and construction parameters. Although extensive research has focused on tunnel deformation in orthogonal systems, oblique systems require additional investigation. At different stages, preventing failure involves three levels: proactive avoidance, proactive mitigation, and passive reinforcement. Traditional approaches involve “divide and conquer,” but considering tunnels and slopes as an integrated whole is an emerging research area. Innovative technologies, like Negative Poisson's ratio anchor cables and Steel-Concrete Composite Support for challenging loess terrains, are introduced. Applying these technologies in practical engineering is recommended to accumulate experience and support their mature application. This review can offer valuable support for designing, operating, and managing tunnels crossing areas prone to loess landslides.

黄土坡-隧道系统的故障:触发源、作用机制和缓解策略概述
深刻理解黄土边坡与隧道之间的相互作用,掌握穿越黄土边坡隧道的防护措施,对于确保黄土边坡地区隧道的开挖和运营安全至关重要。本文总结了有关黄土坡-隧道系统的研究成果,主要集中在引发失效的源头、失效的作用机理以及失效缓解策略等方面。黄土坡作为隧道的承载介质,在施工和运营过程中可能会受到工程干扰,严重影响其稳定性。这体现在斜坡裂缝形成、渗水和振动传播的加剧上。斜坡与隧道相互作用的程度取决于相对空间定位、斜坡特征和施工参数。尽管大量研究集中于正交系统中的隧道变形,但斜交系统还需要更多的研究。在不同阶段,预防坍塌涉及三个层面:主动避免、主动缓解和被动加固。传统的方法是 "分而治之",但将隧道和斜坡视为一个整体是一个新兴的研究领域。介绍了一些创新技术,如负泊松比锚索和用于挑战性黄土地形的钢-混凝土复合支撑。建议在实际工程中应用这些技术,以积累经验并支持其成熟应用。本综述可为穿越黄土滑坡易发区的隧道设计、运营和管理提供有价值的支持。
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来源期刊
Engineering Failure Analysis
Engineering Failure Analysis 工程技术-材料科学:表征与测试
CiteScore
7.70
自引率
20.00%
发文量
956
审稿时长
47 days
期刊介绍: Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.
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