Mechanical and Failure Properties of Deep Grouted Fractured Rock Under Real-Time Coupling of Temperature and Dynamic Load DOI Open Access
Yuhao Jin, Shuo Yang, Hui Guo

и другие.

Processes, Год журнала: 2025, Номер 13(4), С. 1249 - 1249

Опубликована: Апрель 21, 2025

Deep grouting rock engineering is faced with the dual influence of high temperature and dynamic load, which has become a hot issue in geotechnical engineering. This study analyzes mechanical responses failure properties deep-grouted fractured under real-time coupling loads through high-temperature-split Hopkinson pressure bar (HT-SHPB), high-speed imaging, scanning electron microscopy (SEM) tests. Key findings reveal that (1) compressive strength grouted exhibits significant dependency, where increases increase temperature, been verified by relevant references. From indoor to 100 °C, moderately, while pronounced observed between °C 300 °C. (2) In contrast, peak strain demonstrates two-stage evolution, sharply rises from followed slowly rise (3) Macroscopically, impact fractures preferentially initiate as parallel lines at extremities pre-existing fractures, consistent stress concentration patterns loading. Microscopic analysis reveals materials effectively suppress micro-crack generation propagation attributed thermally enhanced cementation pore-filling effects, explaining variation macroscopic microscopic point view.

Язык: Английский

Mechanical and Failure Properties of Deep Grouted Fractured Rock Under Real-Time Coupling of Temperature and Dynamic Load DOI Open Access
Yuhao Jin, Shuo Yang, Hui Guo

и другие.

Processes, Год журнала: 2025, Номер 13(4), С. 1249 - 1249

Опубликована: Апрель 21, 2025

Deep grouting rock engineering is faced with the dual influence of high temperature and dynamic load, which has become a hot issue in geotechnical engineering. This study analyzes mechanical responses failure properties deep-grouted fractured under real-time coupling loads through high-temperature-split Hopkinson pressure bar (HT-SHPB), high-speed imaging, scanning electron microscopy (SEM) tests. Key findings reveal that (1) compressive strength grouted exhibits significant dependency, where increases increase temperature, been verified by relevant references. From indoor to 100 °C, moderately, while pronounced observed between °C 300 °C. (2) In contrast, peak strain demonstrates two-stage evolution, sharply rises from followed slowly rise (3) Macroscopically, impact fractures preferentially initiate as parallel lines at extremities pre-existing fractures, consistent stress concentration patterns loading. Microscopic analysis reveals materials effectively suppress micro-crack generation propagation attributed thermally enhanced cementation pore-filling effects, explaining variation macroscopic microscopic point view.

Язык: Английский

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