Deformation distribution characteristics of a tunnel–slope system and its reinforcement measures

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-06 DOI:10.1007/s10064-025-04297-w

Xiaoxu Tian, Zhanping Song, Yun Cheng, Junbao Wang

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引用次数: 0

Abstract

Mountain tunnel portals unavoidably traverse slopes, forming tunnel–slope systems. During the construction of these systems, engineering disasters such as slope deformation and sliding induced by tunnel excavation and collapse often occur. Using the Hanshankou tunnel as an engineering case, the deformation and force occurring during the entire construction process of the tunnel–slope system were monitored. The daily variation in tunnel vault settlement was 1.85 mm, and after 48 days, the cumulative settlement reached 84.1 mm. Tunnel–slope system disasters involve progressive instability failure processes, and deformation does not converge before a disaster can occur. Under the action of slope deformation, a deep buried side liner can experience extrusion deformation into the tunnel, and a shallow buried side can experience extrusion deformation outside the tunnel. During the tunnel design process, the tunnel–slope system should not be simply regarded as a conventional biased tunnel, and the influence of slope deformation on the bearing capacity of the liner should be considered. Finally, on the basis of the numerical analysis and monitoring results, the causes of slope sliding and the effectiveness of reinforcement measures were analyzed, and lessons to prevent similar events in the future were summarized.

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某隧道边坡体系变形分布特征及加固措施

山地隧道洞口不可避免地要穿过斜坡，形成隧道-斜坡体系。在这些系统的施工过程中，经常会发生隧道开挖和坍塌引起的边坡变形和滑动等工程灾害。以汉山口隧道为工程实例，对隧道-边坡体系在整个施工过程中发生的变形和受力进行了监测。隧道拱顶沉降的日变化量为1.85 mm， 48 d后累积沉降量达到84.1 mm。隧道边坡系统灾害是一个渐进的失稳破坏过程，在灾害发生前变形不会收敛。在边坡变形的作用下，深埋侧衬在隧道内发生挤压变形，浅埋侧衬在隧道外发生挤压变形。在隧道设计过程中，不能简单地将隧道-边坡体系视为传统的偏置隧道，而应考虑边坡变形对衬砌承载力的影响。最后，在数值分析和监测结果的基础上，分析了边坡滑动的原因和加固措施的效果，总结了防止今后类似事件发生的经验教训。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.