尼泊尔Jure岩崩的工程地质特征及破坏机理

IF 3.8 Q2 ENVIRONMENTAL SCIENCES Geoenvironmental Disasters Pub Date : 2023-10-29 DOI:10.1186/s40677-023-00256-3
Suman Panthee, Suman Dulal, Vishnu Himanshu Ratnam Pandey, Vikas Yadav, Prakash Kumar Singh, Ashutosh Kainthola
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引用次数: 0

摘要

岩石雪崩是喜马拉雅山和其他山脉中频繁发生的破坏性现象。为尽量减少今后的损失,有必要研究这些大规模浪费事件的工程地质成因和机制。本研究旨在评估2014年尼泊尔北部Araniko公路沿线Jure岩崩的破坏机制。这一事件阻断了Sunkoshi河,并阻断了一条通往中国的重要经济路线。首先,确定岩体特征和完整强度属性,对破坏区域进行分类。从现场和实验室测量和获得的参数被整合到分析模型中,以获得对破坏机制的结论性解释。进行了构造、运动学和关键块体理论分析,以破译破坏区的演化。结果与讨论岩体质量尚可,但结构不稳定和水的存在导致了岩体的逐渐破坏。关键块的移动和随后的楔形滑动和脚破坏似乎是一种可能的破坏机制。结论本研究从工程地质角度探讨了汝尔岩崩的成因。调查结果可用于类似地质地形的类似大型岩石雪崩的处理,从而最大限度地减少损失。
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Engineering geological characteristics and failure mechanics of Jure rock avalanche, Nepal
Abstract Introduction The rock avalanches are a frequent and disruptive phenomenon in the Himalayas and other mountain chains. To minimize future losses, it is essential to investigate the engineering geological causative factors and mechanism of these mass wasting events. Study area The present work is aimed at assessing the failure mechanism of the disastrous 2014 Jure rock avalanche along Araniko Highway, Northern Nepal. The event had blocked the Sunkoshi River and blocked an economically significant route to China. Geotechnical properties and analysis Initially, rockmass characterization and intact strength attribute were determined for the site to classify the failure zone. The parameters measured and obtained from the field and laboratory were integrated into the analytical models to obtain a conclusive interpretation of the failure mechanism. Structural, kinematic, and key block theory analyses have been carried out for decipher the evolution of the failure zone. Results and discussion Rock mass was found to be of fair quality, however, the structural instabilities and the presence of water has led to a progressive failure. Movement of the key block and subsequent sliding of wedges and foot failure appears to be a possible failure mechanism. Conclusion The present research explores the contributory engineering geological aspects of the Jure rock avalanche. The investigation results can be used to tackle similar large scale rock avalanches in similar geological terrains and thus minimizing the losses.
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来源期刊
Geoenvironmental Disasters
Geoenvironmental Disasters Social Sciences-Geography, Planning and Development
CiteScore
8.90
自引率
6.20%
发文量
22
期刊介绍: Geoenvironmental Disasters is an international journal with a focus on multi-disciplinary applied and fundamental research and the effects and impacts on infrastructure, society and the environment of geoenvironmental disasters triggered by various types of geo-hazards (e.g. earthquakes, volcanic activity, landslides, tsunamis, intensive erosion and hydro-meteorological events). The integrated study of Geoenvironmental Disasters is an emerging and composite field of research interfacing with areas traditionally within civil engineering, earth sciences, atmospheric sciences and the life sciences. It centers on the interactions within and between the Earth''s ground, air and water environments, all of which are affected by climate, geological, morphological and anthropological processes; and biological and ecological cycles. Disasters are dynamic forces which can change the Earth pervasively, rapidly, or abruptly, and which can generate lasting effects on the natural and built environments. The journal publishes research papers, case studies and quick reports of recent geoenvironmental disasters, review papers and technical reports of various geoenvironmental disaster-related case studies. The focus on case studies and quick reports of recent geoenvironmental disasters helps to advance the practical understanding of geoenvironmental disasters and to inform future research priorities; they are a major component of the journal. The journal aims for the rapid publication of research papers at a high scientific level. The journal welcomes proposals for special issues reflecting the trends in geoenvironmental disaster reduction and monothematic issues. Researchers and practitioners are encouraged to submit original, unpublished contributions.
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