Case study of cutting slope with progressive failure due to continuous excavation

Li, Q.; Wang, Y. M.; Zhang, K. B.

doi:10.3208/jgssp.v08.c26

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…Manmade slopes and leveled natural slopes tend to change the physical properties of the soil. The main cause of hazard in manmade slopes is excavation [54,55]; geomechanical studies of soft rock slopes state that large deformation of the slope may occur on layered excavations without retaining the structure, due to the unloading of stress, which can lead to slope instability [55,56]. Second, irrigation in fruit grove areas can maintain a high soil water content.…”

Section: Discussionmentioning

confidence: 99%

The Role of Citrus Groves in Rainfall-Triggered Landslide Hazards in Uwajima, Japan

Lusiana

Shinohara

2022

Water

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Landslides often cause deaths and severe economic losses. In general, forests play an important role in reducing landslide probability because of the stabilizing effect of the tree roots. Although fruit groves consist of trees, which are similar to forests, practical land management, such as the frequent trampling of fields by laborers and compression of the terrain, may cause such land to become prone to landslides compared with forests. Fruit groves are widely distributed in hilly regions, but few studies have examined their role in landslide initiation. This study aims at filling this gap evaluating the predisposing and triggering conditions for rainfall-triggering landslides in part of Uwajima City, Japan. A large number of landslides occurred due to a heavy rainfall event in July 2018, where citrus groves occupied about 50% of the study area. In this study, we combined geodata with a regression model to assess the landslide hazard of fruit groves in hilly regions. We developed maps for five conditioning factors: slope gradient, slope aspect, normalized difference vegetation index (NDVI), land use, and geology. Based on these five maps and a landslide inventory map, we found that the landslide area density in citrus groves was larger than in forests for the categories of slope gradient, slope aspect, NDVI, and geology. Ten logistic regression models along with different rainfall indices (i.e., 1-h, 3-h, 12-h, 24-h maximum rainfall and total rainfall) and different land use (forests or citrus groves) in addition to the other four conditioning factors were produced. The result revealed that “citrus grove” was a significant factor with a positive coefficient for all models, whereas “forest” was a negative coefficient. These results suggest that citrus groves have a higher probability of landslide initiation than forests in this study area. Similar studies targeting different sites with various types of fruit groves and several rainfall events are crucial to generalize the analysis of landslide hazard in fruit groves.

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Section: Discussionmentioning

confidence: 99%

The Role of Citrus Groves in Rainfall-Triggered Landslide Hazards in Uwajima, Japan

Lusiana

Shinohara

2022

Water

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“…According to the results, the damage was primarily caused by excavation that activated the ancient slip zone, thereby allowing external factors to impact the slope and cause a shallow slide. Therefore, as a precaution against future failures of cut slopes, it is usually necessary to study the cut slope failure after a landslide, obtain an adequate interpretation of the causes of collapses, and conduct a series of comprehensive landslide examinations [42][43][44][45][46]. As a result, the above-mentioned authors adopted different approaches and instruments to monitor landslide conditions.…”

Section: Introductionmentioning

confidence: 99%

Field and Numerical Investigation of Taihu Resort Cut Slope Failure in Suzhou, China

Raouf,

Feng,

Zhang

et al. 2024

Applied Sciences

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This study aims to determine the cause of a landslide located at Taihu Resort in Suzhou, Jiangsu Province, China. Field monitoring has been conducted, including two-dimensional finite element method (FEM) numerical analyses to examine slope stability under different working conditions. The monitoring data indicated that the slope deformation was triggered in two phases: at a certain period when the slope was cut and moderate rainfall occurred in November; and afterward, when a continuous heavy rainfall intensity hit during the monsoon rainfall, which accelerated sliding of the slope. Numerical simulations show that stress and maximum displacement distributions formed and redistributed during the excavation process, where the shear strain occurred mainly in the front layer of soil. Additionally, the factor of safety of the slope decreases gradually with the increase in the excavation rate. During 15 days of continuous rainfall infiltration, the slope under heavy rainfall indicates a minimum factor of safety (FoS). Specifically, the slope excavation followed by heavy rainfall intensities contributed significantly to the landslide.

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Topological mapping of complex networks from high slope deformation time series for landslide risk assessment

Han¹,

Bao²

2022

Expert Systems with Applications

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Case study of cutting slope with progressive failure due to continuous excavation

Cited by 5 publications

References 6 publications

The Role of Citrus Groves in Rainfall-Triggered Landslide Hazards in Uwajima, Japan

The Role of Citrus Groves in Rainfall-Triggered Landslide Hazards in Uwajima, Japan

Field and Numerical Investigation of Taihu Resort Cut Slope Failure in Suzhou, China

Topological mapping of complex networks from high slope deformation time series for landslide risk assessment

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