Large-Scale Test Model of the Progressive Deformation and Failure of Cracked Soil Slopes

Zhou, Zhongxing; Zhang, Jiaming; Ning, Fulong; Chong, Lily; Sun, Kuangbiao

doi:10.1007/s12583-020-1342-6

Cited by 20 publications

(3 citation statements)

References 28 publications

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“…They observed cracks around the loading plate during the tests, and they also concluded that reinforcements could improve slope performance. Zhou et al (2020) reported large-scale model tests results on the progressive failure of cracked slopes Flowchart to calculate F. subjected to rainfall. They found that the preferential flow in the cracks had a significant influence on the instability of slopes.…”

Section: Introductionmentioning

confidence: 99%

Stability analysis of slopes with cracks using the finite element limit analysis method

Hu,

Zeng,

Yao

2024

Front. Earth Sci.

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There are numerous slope projects involved in railway and highway constructions, and ensuring the stability of slopes, especially those with cracks, is very important. Compared with the limit equilibrium method, the limit analysis method takes into account the soil’s stress-strain behavior and boundary conditions, thereby yielding more rigorous and accurate results. The stability of slopes with cracks was examined using the finite element limit analysis method in this study. Results indicate that the stability of the slope decreases with the crack length, especially for slope with small slope ratio (i.e., α ≤ 1:1.5) and when lc/H exceeds 25%. The influence of crack inclination angle on slope stability increases with crack length, and the safety factor is larger in cases of negative inclination value cases as compared to those in positive inclination value cases when lc/H ≥ 0.33. Values of safety factor are larger in cases of slope with reinforcement as compared to those without reinforcement, and the values of F increase by about 20%. Additionally, the slip planes for slopes with reinforcement are located 10% further away from the slope surface compared to those without reinforcement, and reinforcements enhance the slope integrity.

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Section: Introductionmentioning

confidence: 99%

Stability analysis of slopes with cracks using the finite element limit analysis method

Hu,

Zeng,

Yao

2024

Front. Earth Sci.

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“…One important characteristic of the Asian monsoon is the typhoon (Webster et al, 1998), which commonly causes very heavy precipitation that can trigger cluster landslides in the hilly coastal region (Zhuang et al, 2022). In eastern China, typhoon rainfall-triggered landslides are major geomorphological activities, causing damage to infrastructure and the environment each year to the extent of millions of RMB (Wang and Yin 2018;Zhou et al, 2020;Li et al, 2021). Hence, it is of great importance to determine the developmental mechanisms behind these landslides for both the scientific community and local authorities.…”

Section: Introductionmentioning

confidence: 99%

Developmental characteristics of rainfall-induced landslides from 1999 to 2016 in Wenzhou City of China

Qin¹,

Guo

et al. 2022

Front. Earth Sci.

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Many landslides are triggered by excess precipitation. In the eastern part of China, landslides caused by extreme rainfall from typhoons in the monsoon season are the main geomorphological process with catastrophic impacts on society and the environment. In this study, Wenzhou City in eastern China was taken as the study area, and we compiled a detailed inventory of rainfall-triggered landslides between 1999 and 2016. The developmental characteristics of these landslides were determined with an emphasis on temporo-spatial distribution. The results showed that most of the landslides were located in the mountainous area of the western part of Wenzhou City. Landslides triggered by typhoon rainfall were commonly concentrated in a short period from July to September, when more than 70% of the landslides occurred. The landslides in this region were mainly of the debris-flow type, most of which were on a small scale, but had severe effects because of large elevation differences and long runout distances. Because the precipitation in typhoon events was commonly extreme, the initiation area of most landslides coincided with the region of highest hourly precipitation. Our results can provide reference data and guidelines for developing an early warning system for landslides and risk reduction in the study area.

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“…The occurrence of soil desiccation cracking has a significant effect on structure safety as it causes crucial implication in the performance of soil such as leakage of nuclides in compacted bentonite [3][4][5][6], landslides and mudslides in clayey soil [7,8]. Understanding the phenomena is also of significant importance in the field of eco-geo construction such as raw earth building [9] which, despite being a prominent new technique, it faces the risk of desiccation cracking because of severe exposure to dry conditions, [10] especially during preparation of the material.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Desiccation Cracking In Clayey Soil: A New FEM-MPM Coupling Method.

Jihen

Salma

Trabelsi

et al. 2021

Preprint

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Desiccation cracking is a critical phenomenon soliciting the soil hydro-mechanical behavior, and significantly affects the performance of soil in geotechnical engineering. For this reason, an increasing interest toward studying and simulating the soil crack propagation, after a severe exposure to dry conditions (induced by desiccation), has been noticed during the recent years. However, major gaps remain in the previously developed models to properly provide a realistic prediction of the cracks pattern scheme especially when using the classical Finite Element Method (FEM), widely used in the geotechnical application. In this study, owing to the limitation of this method in re-meshing and dealing with large deformation, the authors were prompted to couple FEM with a mesh-free method: The Material Point Method (MPM) to overcome the individual drawbacks of each method. The dominant influencing factors on soil desiccation cracking have been assessed through a desiccation test performed in climatic chamber and using a digital image processing technique (image analysis) for a quantitative description of the studied sample. A model that relates porosity with suction and tensile strength was used to study the effect of the shrinkage phenomena in desiccation term, and to simulate the crack propagation in a thin clayey soil layer using the Code_Bright software. Consequently, a clear and connected crack pattern was observed, the problem of mesh dependency was clearly overcome proving the validity of the approach and providing a further insight into the behavior of clayey soil exposed to desiccation factors.

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Large-Scale Test Model of the Progressive Deformation and Failure of Cracked Soil Slopes

Cited by 20 publications

References 28 publications

Stability analysis of slopes with cracks using the finite element limit analysis method

Stability analysis of slopes with cracks using the finite element limit analysis method

Developmental characteristics of rainfall-induced landslides from 1999 to 2016 in Wenzhou City of China

Numerical Study of Desiccation Cracking In Clayey Soil: A New FEM-MPM Coupling Method.

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