Stability analysis of soft–hard-interbedded anti-inclined rock slope

Guo, Jian‐jun; Wu, Zhenwei; Li, Kai

doi:10.1038/s41598-023-28657-2

Cited by 4 publications

(1 citation statement)

References 22 publications

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“…Studies have investigated the borehole stability in shale 15 – 22 , hydration models and the influence of salinity on hydration 23 , 24 , factors affecting the mechanical properties of shale 25 – 32 , and failure criteria of shale 33 , 34 . Additionally, other studies have explored the impact of shale and other rock characteristics on underground openings 21 , 35 – 38 in various regions. However, in the current works, the engineering geological approach has been used primarily to explore the shale's instability mechanism.…”

Section: Introductionmentioning

confidence: 99%

Potential of carboxymethyl cellulose solution to increase the shale stability

Alam,

Fujii,

Dipu

et al. 2023

Sci Rep

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Slope failures in Bangladesh's Chittagong division are a growing concern, with fatalities increasing from 19 in 2000 to 162 in 2017 and projected to rise further. This study aims to identify the most vulnerable rock formation and assess Carboxymethyl Cellulose (CMC) as a solution for enhancing shale strength and mitigating slope failures. The research began by evaluating weathering susceptibility and stability of different rock layers, revealing the high instability of shale in the Bhuban Formation. Slake durability tests measured cation concentration to understand shale instability mechanisms. Laboratory experiments, including immersion tests and grained-and-molded shale specimens, examined CMC's potential to improve shale stability. Results indicated that the shale of the Bhuban Formation had the highest hammer value variations, indicating increased weathering susceptibility. Shale instability was attributed to illite layer dissolution, releasing K+. Intact shale specimens treated with CMC showed enhanced penetration resistance, shear strength, and deformation behavior, suggesting CMC's potential in increasing shale stability. Grained-and-molded shale specimens treated with CMC demonstrated increased shear strength, critical shear displacement, and contraction deformational behavior. Optical microscopy and scanning electron microscopy revealed the formation of cross-links between shale grains, contributing to improved shale stability. Further research is needed to explore the application of CMC for enhancing in situ rock slope stability. This study emphasizes the importance of addressing slope failures in the Chittagong division and provides insights into mitigating the risks through CMC-based interventions.

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Section: Introductionmentioning

confidence: 99%

Potential of carboxymethyl cellulose solution to increase the shale stability

Alam,

Fujii,

Dipu

et al. 2023

Sci Rep

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Theoretical study on stability evolution of soft and hard interbedded bedding reservoir slopes

Wu,

Zhang,

Tang

et al. 2023

J. Mt. Sci.

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A nonlinear creep model of hard structural planes

Cui,

Dai,

Jia

et al. 2024

PLoS ONE

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Hard structural planes mainly exist in rock slopes and their creep characteristics largely determine slope stability. Traditional models have some shortcomings in describing the creep characteristics of hard structural planes, such as poor adaptability and unclear physical meaning of parameters. In order to overcome these shortcomings, based on the creep failure mechanism of hard structural planes, an element combination model is adopted in the study. In the instantaneous deformation stage, the plastic deformation proportional coefficient n is introduced based on the strain rebound theory of loading-unloading tests. In the attenuation creep stage, the hardening coefficient C and creep index m are introduced. In the viscoelastic-plastic failure stage, the weakening factor k is introduced. By improving traditional elements, a new piecewise nonlinear constitutive relationship of hard structural planes is established and then the creep equation is obtained with integration method. The adaptability of the established model and the way to solve parameters are analyzed and the correctness of the model is proved theoretically. The data of creep tests of the prefabricated serrated interpenetrated green sandstone structural plane and the concealed non-interpenetrated marble structural plane are further fitted and verified, yielding a fitting result exceeding 0.95, thereby indicating a strong correlation. By optimizing the whole creep process of the hard structural plane in stages and demonstrating the difference in the creep mechanism of the hard structural plane at different depths in a rock mass in the high and low stress fields in the form of piecewise function, the physical meaning of the improved model is clearer. In addition, the improved model allows the higher accuracy of nonlinear characteristics in attenuation creep stage and acceleration creep stage and provides the theoretical basis for the stability analysis of rock slopes.

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Stability analysis of soft–hard-interbedded anti-inclined rock slope

Cited by 4 publications

References 22 publications

Potential of carboxymethyl cellulose solution to increase the shale stability

Potential of carboxymethyl cellulose solution to increase the shale stability

Theoretical study on stability evolution of soft and hard interbedded bedding reservoir slopes

A nonlinear creep model of hard structural planes

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