A comprehensive investigation of engineering geological characteristics of interlayer shear weakness zones embedded within Baihetan hydropower station

Article Engineering, Geological

Comparative analysis of deformation and failure mechanisms of underground powerhouses on the left and right banks of Baihetan hydropower station

Anchi Shi et al.

Summary: This study presents a comparative analysis of the deformation and failure characteristics of the surrounding rocks of underground powerhouses on the left and right banks of the Baihetan hydropower station. The results show significant differences in failure characteristics and deformation magnitude between the left and right bank underground powerhouses.

JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING (2022)

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Article Engineering, Geological

Failure modes and excavation stability of large-scale columnar jointed rock masses containing interlayer shear weakness zones

Danchen Zhao et al.

Summary: The mechanical properties of large-scale columnar jointed rock masses (CJRMs) after excavation are influenced by unloading relaxation and cutting of interlayer shear weakness zones, which complicates the stability control of the project. The study reconstructs CJRMs with interlayer shear weakness zones and conducts 3D rock failure process analysis. The results show that the columnar joints and interlayer shear weakness zones significantly affect the mechanical properties and failure modes, leading to different types of damage in the numerical models.

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES (2022)

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Article Engineering, Environmental

A comprehensive investigation on the shear properties of interlayer shear weakness zones

Gang Han et al.

Summary: ISWZs are weak deformation zones found in stratified rock masses, posing a threat to rock engineering projects due to their poor mechanical properties and large-scale distributions. This study investigates ISWZs at the Baihetan Hydropower Station, and finds that infilling ratio plays a significant role in controlling failure modes, shear strength, and shear dilatancy of ISWZs.

BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT (2021)

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Article Engineering, Geological

An Insight into the Excavation-Induced Stress Paths on Mechanical Response of Weak Interlayer Zone in Underground Cavern Under High Geostress

Shu-Qian Duan et al.

Summary: Through experimental tests and analysis, this study reveals the mechanical response characteristics of Weak Interlayer Zone (WIZ) under different loading and unloading stress paths, indicating that its mechanical properties are influenced by the initial confining pressure and stress paths. Additionally, the study shows that WIZ exhibits sudden increases in circumferential strain and significant dilations during unloading, with certain stress paths having more pronounced effects.

ROCK MECHANICS AND ROCK ENGINEERING (2021)

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Article Computer Science, Interdisciplinary Applications