Experimental study on the influence of wetting deformation on the strength and deformation characteristics of rockfill materials

IF 4.2 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2025-09-25 DOI:10.1007/s10064-025-04468-9

Zhitao Zhang, Enyue Ji, Zhongzhi Fu, Shengshui Chen

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引用次数: 0

Abstract

This study investigates the loading-wetting relationship of rockfill materials through oedometric and triaxial compression tests on two types of rockfill materials during the loading-wetting cycle. Despite significant differences in lithology, it was observed that the initial reloading phase following wetting in both oedometer and triaxial tests consistently involved a degree of plastic hardening, indicating a strong coupling effect between loading and wetting. The universality of this plastic hardening was further validated using a weakening model for rockfill materials. Notably, the hardening caused by the sliding, crushing and rearrangement of rock particles will always dominate, rather than the softening of rock particles. In terms of strength parameters, subsequent loading primarily influenced the cohesion of the material, while the internal friction angle remained largely unchanged. Finally, a conceptual model of the loading-wetting coupling was developed based on the elastic-plastic hardening theory. This model is straightforward and offers potential as a framework for expanding into a more comprehensive elastic-plastic constitutive model.

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润湿变形对堆石料强度及变形特性影响的试验研究

通过对两种堆石料在加载-润湿循环过程中的尺寸试验和三轴压缩试验，研究了堆石料的加载-润湿关系。尽管在岩性上存在显著差异，但在粘度计和三轴试验中观察到，润湿后的初始再加载阶段始终涉及一定程度的塑性硬化，这表明加载和润湿之间存在很强的耦合效应。通过对堆石料的弱化模型进一步验证了这种塑性硬化的普遍性。值得注意的是，岩石颗粒的滑动、破碎和重排引起的硬化总是占主导地位，而不是岩石颗粒的软化。在强度参数方面，后续加载主要影响材料的黏聚力，内摩擦角基本保持不变。最后，基于弹塑性硬化理论建立了加载-润湿耦合的概念模型。这个模型是直接的，并提供了扩展到一个更全面的弹塑性本构模型的框架潜力。

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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.