Wmic-GMTS and Wmic-GMERR criteria for micron-scale crack propagation in red-bed soft rocks under hydraulic action

扫码查看

原文链接

万方数据
维普

外文摘要：Micron-scale crack propagation in red-bed soft rocks under hydraulic action is a common cause of en-gineering disasters due to damage to the hard rock-soft rock-water interface.Previous studies have not provided a theoretical analysis of the length,inclination angle,and propagation angle of micron-scale cracks,nor have they established appropriate criteria to describe the crack propagation process.The propagation mechanism of micron-scale cracks in red-bed soft rocks under hydraulic action is not yet fully understood,which makes it challenging to prevent engineering disasters in these types of rocks.To address this issue,we have used the existing generalized maximum tangential stress(GMTS)and generalized maximum energy release rate(GMERR)criteria as the basis and introduced parameters related to micron-scale crack propagation and water action.The GMTS and GMERR criteria for micron-scale crack propagation in red-bed soft rocks under hydraulic action(abbreviated as the Wmic-GMTS and Wmic-GMERR criteria,respectively)were established to evaluate micron-scale crack propagation in red-bed soft rocks under hydraulic action.The influence of the parameters was also described.The process of micron-scale crack propagation under hydraulic action was monitored using uniaxial compression tests(UCTs)based on digital image correlation(DIC)technology.The study analyzed the length,propagation and inclination angles,and mechanical parameters of micron-scale crack propagation to confirm the reliability of the established criteria.The findings suggest that the Wmic-GMTS and Wmic-GMERR criteria are effective in describing the micron-scale crack propagation in red-bed soft rocks under hy-draulic action.This study discusses the mechanism of micron-scale crack propagation and its effect on engineering disasters under hydraulic action.It covers topics such as the internal-external weakening of nano-scale particles,lateral propagation of micron-scale cracks,weakening of the mechanical properties of millimeter-scale soft rocks,and resulting interface damage at the engineering scale.The study pro-vides a theoretical basis for the mechanism of disasters in red-bed soft-rock engineering under hydraulic action.

外文关键词：

Red-bed soft rocksHydraulic actionMicron-scale cracksGeneralized maximum tangential stress(GMTS)criterionGeneralized maximum energy release rate(GMERR)criterionDigital image correlation(DIC)

作者：

Guangjun Cui、Chunhui Lan、Cuiying Zhou、Zhen Liu、Chang Xia

展开 >

作者单位：

Institute of Estuarine and Coastal Research,School of Ocean Engineering and Technology,Sun Yat-sen University,Guangzhou,510275,China

Guangdong Provincial Engineering Research Center of Coasts,Islands and Reefs,Sun Yat-sen University,Guangzhou,510275,China

Guangdong Engineering Research Center for Major Infrastructure Safety,Sun Yat-sen University,Guangzhou,510275,China

The Hong Kong Polytechnic University,Hong Kong,China

展开 >

基金：

National Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)

项目编号：

422933544229335142277131

出版年：

2024

DOI：

10.1016/j.jrmge.2023.12.031

岩石力学与岩土工程学报(英文版)

中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD

影响因子：0.404

ISSN：1674-7755

年,卷(期)：2024.16(9)