Quantitative damage evaluation of galleries under rockfall impact: a generalized pressure-impulse diagram

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-05 DOI:10.1007/s10064-025-04253-8

Zhi Gao, Shuaixing Yan, Dongpo Wang, Hani Meree, Wei Li, Qiwei He, Xuanmei Fan

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Abstract

Galleries are commonly implemented to protect tunnel entrances from rockfall impacts. This study proposes a novel approach for the quantitative damage evaluation of galleries, leveraging a generalized Pressure-Impulse (P-I) diagram. The dynamic responses and damage evolution under the influence of different rockfall mass, velocity, shape, cushion density and thickness are analyzed. On this basis, a displacement-based damage index (D = u/u_d) is formulated and correlated with the mean damage value ψ computed using the validated Concrete Damaged Plasticity (CDP) model. The damage was quantitatively categorized into four levels, with the primary independent control variables identified through dimensionless analysis. Using this method, the damage function and failure modes of the binaural integral galleries are derived. Finally, this method was validated by using single pressure galleries. The findings provide a robust framework for assessing rockfall impacts on galleries.

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岩崩冲击下廊道损伤定量评价：广义压力-冲量图

通常采用廊道来保护隧道入口免受岩崩的冲击。本研究提出了一种利用广义压力-脉冲（P-I）图定量评价廊道损伤的新方法。分析了不同落石质量、速度、形状、垫层密度和厚度影响下的动力响应和损伤演化过程。在此基础上，建立了基于位移的损伤指数（D = u/ud），并将其与经过验证的混凝土损伤塑性（CDP）模型计算的平均损伤值ψ相关联。通过无量纲分析确定了主要的独立控制变量，并将其定性为4个等级。利用该方法推导了双耳积分廊道的损伤函数和破坏模式。最后，用单个压力通道对该方法进行了验证。这些发现为评估岩崩对画廊的影响提供了一个强有力的框架。

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.