Analysis of failure of high slope subjected to rainfall infiltration at Peringavu in Kerala, India

Kumar, Vaddepalli Santhosh; Chandrasekaran, S. S.

doi:10.1016/j.engfailanal.2022.106423

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…Mizoram, part of the Himalayan mobile belt, experiences significant neo-tectonic activity, making it prone to slope failures, especially near active fault zones [3,4]. The region's young geological setting consists mainly of unstable, soft sedimentary rocks, which are susceptible to landslides during intense rainfall [6,16]. Figure 3a shows that the Northeast region of India has the highest number of landslides [7,15].…”

Section: Hazardmentioning

confidence: 99%

“…Landslides are common in the Himalayas and Northeast India, posing serious threats to both infrastructure and lives due to their sudden and rapid movement [3][4][5]. Notably, the 2012 landslides in Rohtang Pass and the 2017 events in Mizoram caused significant damage, highlighting the urgent need for improved understanding and mitigation strategies for these natural hazards [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Mechanics of Rainfall-Induced Landslides after a Prolonged Dry Period Based on Laboratory Tests and Numerical Models Incorporating Soil-Water Characteristic Curves

Bhadiyadra,

Ong

2024

Geosciences

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In India, particularly within its Northeastern territories, landslides triggered by rainfall following dry periods are a major concern, consistently causing extensive damage to both life and infrastructure. This study focuses on mitigating their impact through preemptive measures, with an emphasis on analyzing slope stability to determine critical intervention points. The investigation includes experimental tests on soil samples to assess key parameters, such as soil matric suction and unconfined compressive strength, alongside an analysis of slope failures during the 2017 monsoon in Mizoram’s Lunglei district. Employing Soil-Water Characteristic Curves (SWCC) derived from ASTM D5298-10 standards and a microwave drying technique for preparing soil samples, the research evaluates the condition of the slopes before and after monsoonal rains. This study utilizes a blend of numerical modeling and empirical laboratory investigations to explore the factors contributing to slope instability. The findings underscore the necessity of advanced landslide warning systems, suggesting that a deeper understanding of rainfall-induced slope failures could significantly enhance disaster preparedness and reduce potential damages.

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Section: Hazardmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanics of Rainfall-Induced Landslides after a Prolonged Dry Period Based on Laboratory Tests and Numerical Models Incorporating Soil-Water Characteristic Curves

Bhadiyadra,

Ong

2024

Geosciences

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“…Most failures, in Rwanda as in other countries, regard road cut slopes and are caused by the natural weathering of soft rocks, which appear rather stable in the short term after excavation but become unstable and may fail in the long term [16,17]. For some cut slopes, failures are due to extreme steepness, slope height, and inadequate estimation of soil resistance.…”

Section: Introductionmentioning

confidence: 99%

Combined Effect of the Microstructure and Mechanical Behavior of Lateritic Soils in the Instability of a Road Cut Slope in Rwanda

Valentino,

Pizzati,

Mizero

2024

GeoHazards

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A very common hazard in Rwanda is represented by the instability of steep road cut slopes in lateritic soil. In its natural state, this material appears as a fine-grained weak and altered rock, generally in unsaturated conditions. Steep cut slopes made by this material could remain stable for a long time unless weathering weakens its mechanical behavior and heavy rainfall provokes a rapid landslide. This paper presents the results of an experimental investigation on the microstructural, petrophysical, and geotechnical properties of lateritic soil from a road cut slope located in Kabaya (Ngororero District—Rwanda), which was recently subjected to a landslide. The mechanical properties of the material are strictly related to the geological origin and history of the deposits, their formation environment, and weathering processes. These characteristics were revealed by peculiar microstructural features (micro-texture, porosity, and degree of alteration of original mineral paragenesis). The experimental investigations included identification and classification tests, direct shear tests on saturated samples, and swelling tests. This multidisciplinary approach provided insights into the relationship between geotechnical properties and the microstructural, petrophysical, and chemical characteristics of the altered rocks. This study showed how different levels of chemical alteration operated by weathering processes, in conjunction with brittle deformation related to the tectonic history, formed in the same site two shallow rock layers with similar macro-scale features and mechanical behaviors but markedly different microstructural and chemical properties. The innovative aspect of this research suggests an integrated multidisciplinary approach to considering microstructural aspects in addition to mechanical behavior in the slope stability analyses in lateritic soil. In particular, this study demonstrates the importance of such an approach since the failure mechanism is better explained if it is based on microstructural observations instead of considering the soil shear strength parameters only. This research helped to explain the formation of the landslide failure mechanism in a specific road cut slope, which could be assumed as representative of many other similar slopes subjected to landslides in Rwanda.

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Use of Replaceable Tubular Filter Element as a New Type of Horizontal Drains for Maintaining the Stability of Expansive Soil Slopes

He,

Jiang,

Shi

et al. 2024

Geotech Geol Eng

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Analysis of failure of high slope subjected to rainfall infiltration at Peringavu in Kerala, India

Cited by 6 publications

References 34 publications

Mechanics of Rainfall-Induced Landslides after a Prolonged Dry Period Based on Laboratory Tests and Numerical Models Incorporating Soil-Water Characteristic Curves

Mechanics of Rainfall-Induced Landslides after a Prolonged Dry Period Based on Laboratory Tests and Numerical Models Incorporating Soil-Water Characteristic Curves

Combined Effect of the Microstructure and Mechanical Behavior of Lateritic Soils in the Instability of a Road Cut Slope in Rwanda

Use of Replaceable Tubular Filter Element as a New Type of Horizontal Drains for Maintaining the Stability of Expansive Soil Slopes

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