Direct and reversal shear behaviors of three kinds of slip zone soil in the Northwest of China

Chen, Wenwu; Song, Binghui; Wu, Weijiang; Sun, Yongfu; Song, Yupeng

doi:10.1007/s10064-021-02174-w

Cited by 11 publications

(3 citation statements)

References 77 publications

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“…The accuracy of prediction and monitoring in moisture-induced landslide environments may be improved by combining groundwater mapping with modulus distributions [93]. Strain-softening behavior observed in direct shear tests of these media has been linked to sudden collapse events in loess landslides [94]. Figure 6 shows the relationship between shear strength parameters and water content for different slip zone soils.…”

Section: Shear Strengthmentioning

confidence: 99%

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Factors Affecting the Stability of Loess Landslides: A Review

Wei,

Zeng,

Yan

2024

Applied Sciences

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The stability of loess landslides affects the production and livelihood of the people in its vicinity. The stability of loess landslides is influenced by various factors, including internal structure, collapsibility, water content, and shear strength. The landslide stability of loesses can be analyzed by several geophysical methods, such as seismic refraction tomography (SRT), electrical resistivity tomography (ERT), micro-seismic technology, and ground penetrating radar (GPR). Geotechnical tests (compression and shear tests) and remote sensing techniques (Global Navigation Satellite System (GNSS), Interferometric Synthetic Aperture Radar (InSAR) and airborne 3D laser technology) are used for studying the landslide stability of loesses as well. Some of the methods above can measure parameters (e.g., fractures, water content, shear strength, creep) which influence the stability of loess landslides, while other methods qualitatively indicate the influencing factors. Integrating parameters measured by different methods, minimizing disturbances to landslides, and assessing landslide stability are important steps in studying landslide hazards. This paper comprehensively introduces the methods used in recent studies on the landslide stability of loesses and summarizes the factors which affect the landslide stability. Furthermore, the relationships between different parameters and methods are examined. This paper enhances comprehension of the underlying mechanisms of the stability of loess landslides to diminish disastrous consequences.

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Section: Shear Strengthmentioning

confidence: 99%

“…Therefore, the key determinant of slope failure may be the Reprinted/adapted with permission from Ref. [94]. 2021, Springer Nature.…”

Section: Pore Water Pressurementioning

confidence: 99%

Factors Affecting the Stability of Loess Landslides: A Review

Wei,

Zeng,

Yan

2024

Applied Sciences

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“…These tests aided in constructing a hydraulic mechanical database of phyllite weathered soil and assessing its engineering suitability. Chen et al (2021) examined the direct and reverse shear characteristics of weathered phyllite and different soil types, and observed that the ductile shear behavior of weathered phyllite matched the creep deformation of the landslides it was associated with. Yin et al (2023) studied the effects of dry-wet cycling on the shear strength of phyllite weathered soil, and found that the shear strength of the soil weakened as the number of cycles increased.…”

Section: Introductionmentioning

confidence: 99%

Swelling pressure of phyllite residual soil during saturation

Zhang,

Qin,

Tang

et al. 2024

Front. Mater.

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Phyllite residual soil is a typical regional soil formed from the weathering of phyllite rock formations, characterized by poor engineering properties. The swelling pressure could pose a threat to roadbed stability and other geological engineering disasters during the rainy season. Therefore, studying the swelling pressure of phyllite residual soil is critical for ensuring the sustainable development of both human society and the natural environment. In this study, a series of swelling pressure tests were conducted on the phyllite residual soil to determine its swelling pressure, and nuclear magnetic resonance (NMR) test was applied to assess the evolution of soil fabric in both the initial unsaturated state and saturated state. The results indicate that the swelling rate of phyllite residual soil is negatively correlated with the initial water content and positively correlates with the dry density. The denser or drier the phyllite residual soil is in its initial state, the higher the equilibrium swelling pressure will be. The analysis of T2 distribution curves reveals that during the wetting process in phyllite residual soil, water fills micropores prior to macropores until water fills up all pores.

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