Investigate the mechanical property of weak interlayers based on micro-RME and AGBM

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-28 DOI:10.1007/s10064-024-03979-1

Jingjing Xu, Jiangmei Qiao, Fei Gao, Xin Huang, Dong Yuan, Xuhai Tang

引用次数: 0

Abstract

Weak interlayers are difficult to be measured using the traditional macroscale Rock Mechanics Experiment, which requires intact and standard rock samples. Because the zones of weak interlayers are usually narrow and variable, and the geomaterials in weak interlayers are fragmented and muddy. This work combines the microscale Rock Mechanics Experiment (micro-RME) and Accurate Grain-Based Models (AGBM), in order to investigate the mechanical property of the weak interlayer found during the construction of Sichuan-Tibet Railway. The composition and mechanical property of rock-forming minerals in weak interlayers were tested using micro-RME, TESCAN Integrated Mineral Analyzer and nanoindentation testing. Based on the results of micro-RME, the AGBM was established to achieve the macroscale property of weak interlayers. The influence of weak interlayers on the deformation of surrounding rocks was discussed numerically.

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研究基于微 RME 和 AGBM 的弱夹层的机械性能

传统的宏观岩石力学实验需要完整和标准的岩石样本，很难对软弱夹层进行测量。因为软弱夹层的区域通常比较狭窄且多变，而且软弱夹层中的岩土材料比较破碎、浑浊。本研究将微尺度岩石力学实验（micro-RME）和精确晶粒模型（AGBM）相结合，研究川藏铁路建设过程中发现的软弱夹层的力学性质。采用显微-RME、TESCAN 综合矿物分析仪和纳米压痕测试法测试了软弱夹层中成岩矿物的组成和力学性能。根据显微 RME 的结果，建立了 AGBM，以实现弱夹层的宏观特性。数值讨论了弱夹层对围岩变形的影响。

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.