A novel method to evaluate the time-dependent stability of reservoir landslides: exemplified by Outang landslide in the Three Gorges Reservoir

Zou, Zongxing; Luo, Tao; Zhang, Shu; Duan, Haojie; Li, Shuwen; Wang, Jinge; Deng, Yedan; Wang, Jian

doi:10.1007/s10346-023-02056-0

Cited by 31 publications

(5 citation statements)

References 49 publications

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“…Secondly, due to the drawbacks of the direct shear test, the further study may be implemented by the triaxial compression or ring shear apparatus, with emphasis on observing the change in stress-strain during the test, as well as stiffness and residual shear strength. Moreover, the shear strength of the geomaterials in the study area can be estimated based on the estimation model so that stability analysis can be launched to analyze the spatial-temporal landslide hazard [35,36].…”

Section: Discussionmentioning

confidence: 99%

Investigating the Shear Strength of Granitic Gneiss Residual Soil Based on Response Surface Methodology

Zeng¹,

Zhang

Zhao

et al. 2023

Sensors

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The shear strength of granitic gneiss residual soil (GGRS) determines the stability of colluvial landslides in the Huanggang area, China. It depends on several parameters that represent its structure and state as well as their interactions, and therefore requires accurate assessment. For an effective evaluation of shear strength parameters of GGRS based on these factors and their interactions, three parameters, namely, moisture content, bulk density, and fractal dimension of grain size, were selected as influencing factors in this study based on a thorough investigation of the survey data and physical property tests of landslides in the study area. The individual effects and interaction of the factors were then incorporated by implementing a series of direct shear tests employing the response surface methodology (RSM) into the regression model of the shear parameters. The results indicate that the factors affecting shear parameters in the order of greater to lower are bulk density, moisture content, and fractal dimension, and their interactions are insignificant. The proposed model was validated by applying it to soil specimens from other landslide sites with the same parent bedrock, showing the validity of the strength regression model. This study demonstrates that RSM can be applied for parameter estimation of soils and provide reliable performance, and is also significant for conducting landslide investigation, evaluation, and regional risk assessment.

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Section: Discussionmentioning

confidence: 99%

Investigating the Shear Strength of Granitic Gneiss Residual Soil Based on Response Surface Methodology

Zeng¹,

Zhang

Zhao

et al. 2023

Sensors

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“…. The Outang landslide in Fengjie County, a largescale ancient landslide, has recently experienced considerable deformation and reactivation due to the combined effects of rainfall and RWL fluctuations (Yin et al, 2010;Zou et al, 2023). Consequently, the reactivation of large-scale ancient landslides along the TGR area has become a critical issue, substantially impacting the reservoir's safe operation (Huang et al, 2020;Liao et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Mechanism of large-scale reservoir landslides with double-sliding zones: insights from long-term field monitoring

Yang,

Zhang,

et al. 2024

Front. Ecol. Evol.

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A significant number of ancient landslides with double or multi-sliding zones exist in reservoir areas. However, understanding large-scale reservoir landslides with double-sliding zones remains limited due to the challenges of studying deformation along the sliding zone independently from surface deformation. In this study, the seepage and deformation characteristics of the Taping landslide were obtained through field investigations and long-term in-situ monitoring. For the first time, hydrological factors influencing double-sliding zones were revealed using an attribute reduction algorithm based on long-term field data. The results indicate that the Taping landslide undergoes significant step-like consistent creep deformation, exhibiting failure along double-sliding zones. For the toe part, reservoir water level (RWL) and precipitation are two critical hydrological factors triggering deformation. Shallow sliding is more susceptible to rainfall, while the deep sliding zone is more affected by RWL variations. In the rear part, precipitation has a greater impact than RWL. Daily precipitation is the primary hydrological factor affecting slope movement along the shallow sliding zone. However, accumulated precipitation over the previous seven days is the most crucial factor influencing slope movement along the deep sliding zone. During the RWL drawdown period, shallow sliding initially occurs at the toe, induced by the de-buttressing effect, while deep sliding occurs after the RWL reaches 145 m, induced by the downslope seepage force. Local damage and failure at the toe provide space for the instability of the rear part, reducing the anti-sliding force. Consequently, failure extends to the rear part. The findings of this study hold significant implications for gaining a deeper understanding of the deformation mechanisms of large-scale reservoir landslides with double-sliding zones and improving landslide management and mitigation strategies in reservoir area.

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“…Shield tunneling may lead to stratum loss and changes in the internal forces of the rock and soil, resulting in the deformation and displacement of the rock, soil (Benmebarek S [1], Chen Y [2], Hasanpour R et al [3], Mohammed J et al [4]) and surrounding buildings (structures). Therefore, many researchers have studied the influence of rock and soil mass (Finno R.J et al [5], Lou P et al [6], Wang J et al [7]), surface (Bouayad D et al [8], Cattoni E et al [9], Hosseini S.A.A et al [10], Li B et al [11], Sharghi M et al [12], Wang X et al [13]) and adjacent building (Katebi H et al [14], Peng F et al [15], Shahin H.M.d et al [16], Sirivachiraporn A et al [17], Wang C et al [18]) deformation on subsurface construction (Zhang J et al [19], Zheng G et al [20]), based on the study of the mechanical properties of rock and soil mass (Zou Z et al [21,22]). Similarly, when a shield tunnel passes existing tunnels, railways, and pipelines, the displacement of the surrounding rock and soil will adversely affect the existing buildings (structures).…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Influence of Super-Large-Diameter Shield Tunneling on Nearby Existing Metro Tunnels and the Protection Scheme

Li,

Zou

2023

Applied Sciences

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To reduce traffic congestion and meet the demand for rail transportation, the diameters of shield tunnels are constantly expanded. The super-large diameter, deep depth and long distance of super-large-diameter shield tunnels, coupled with the limitation of existing structures on underground construction space, cause many problems in the construction of these tunnels, such as affecting existing structures. This study takes a shield project in Wuhan as the research object, uses the finite element method to simulate the influence of super-large-diameter shield tunnelling on the displacement of the existing Line 5 tunnel segments, and analyzes the influence of the isolation pile arrangement and length on the isolation effect. The analysis indicates that (1) the displacement of Line 5 decreases with an increasing horizontal center distance between the tunnels and increases with an increasing vertical center distance between the tunnels, with a maximum displacement of 17.9 mm; (2) the displacement direction and position of the maximum displacement of Line 5 vary with changes in the vertical center distance between the tunnels, but remain essentially constant with changes in the horizontal center distance; and (3) the isolation piles closer to the shield tunnel improve support, with its isolation effect on the Line 5 segment becoming limited.

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A novel method to evaluate the time-dependent stability of reservoir landslides: exemplified by Outang landslide in the Three Gorges Reservoir

Cited by 31 publications

References 49 publications

Investigating the Shear Strength of Granitic Gneiss Residual Soil Based on Response Surface Methodology

Investigating the Shear Strength of Granitic Gneiss Residual Soil Based on Response Surface Methodology

Mechanism of large-scale reservoir landslides with double-sliding zones: insights from long-term field monitoring

Numerical Investigation on the Influence of Super-Large-Diameter Shield Tunneling on Nearby Existing Metro Tunnels and the Protection Scheme

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