From a phenomenological to a geomechanical approach to landslide hazard analysis

Cotecchia, Federica; Santaloia, F.; Lollino, Piernicola; Vitone, Claudia; Pedone, Giuseppe; Bottiglieri, Osvaldo

doi:10.1080/19648189.2014.968744

Cited by 38 publications

(15 citation statements)

References 31 publications

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“…The paper briefly introduces the Pisciolo case study [5], which is representative of the deep and slow landslide processes frequently observed in the Southern Apennines (Italy) [1][2]. A fully coupled hydro-mechanical finite element analysis confirmed that cumulated rainfall infiltration is the main factor triggering the instabilities.…”

Section: Discussionmentioning

confidence: 94%

“…The transition soils have a clay fraction of 40-60% and are characterised by high activity (0.85 on average), low mechanical strength (c'=0 kPa and φ'=20.7° for p'<300 kPa) and high saturated permeability (k in situ >10 -9 m/s) [5,8]. Such hydro-mechanical behaviour is primarily due to the fissured meso-structure of the clay, which impoverishes the mechanical strength properties and increases the hydraulic conductivity with respect to that of the same material when unfissured [1][2][3][4][8][9][10][11]. Fissuring also affects the unsaturated soil behaviour [4,5,8], as observed when subjecting the Pisciolo clay to dryingwetting cycles, during which the suctions have been measured by means of the filter paper technique [12] and the Imperial College high capacity tensiometers [13].…”

Section: Pisciolo Case Studymentioning

confidence: 99%

“…Deep and slow landslides are recurrently observed in clay slopes in the Southern Apennines (Italy) [1,2]. Despite the fact that the landslide movements are slow, the displacement rates show seasonal variations, with trends similar to those characterising the pore pressures.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Soil-Vegetation-Atmosphere Interaction on the Stability of a Clay Slope: A Case Study

et al. 2016

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Abstract. Deep and slow landslide processes are frequently observed in clay slopes located along the Southern Apennines (Italy). A case study representative of these processes, named Pisciolo case study, is discussed in the paper. The geo-hydro-mechanical characteristics of the materials involved in the instability phenomena are initially discussed. Pluviometric, piezometric, inclinometric and GPS monitoring data are subsequently presented, suggesting that rainfall infiltration constitutes the main factor inducing slope movements. The connection between formation of landslide bodies and slope-atmosphere interaction has been demonstrated through a hydro-mechanical finite element analysis, whose results are finally reported in the work. This analysis has been conducted employing a constitutive model that is capable of simulating both saturated and unsaturated soil behaviour, as well as a boundary condition able to simulate the effects of the soil-vegetation-atmosphere interaction.

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Section: Discussionmentioning

confidence: 94%

Section: Pisciolo Case Studymentioning

confidence: 99%

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Effects of Soil-Vegetation-Atmosphere Interaction on the Stability of a Clay Slope: A Case Study

et al. 2016

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“…The activities at large scale are aimed at facilitating local authorities and technical officers in selecting and scheduling the most suitable structural/non-structural interventions (among the categories planned at medium scale). This can be done by analyzing and predicting the damage severity levels-by way of empirical fragility curves-pertaining to homogeneous (in terms of structural and/or foundation typologies) buildings and infrastructure covered by very high-resolution DInSAR data and interacting with slow-moving landslides typified based on their geometric and kinematic characteristics (Cotecchia et al 2016;Ferlisi et al 2018;Gullà et al 2017b;Peduto et al 2017Peduto et al , 2018.…”

Section: The Proposed Multi-scale Methodological Approachmentioning

confidence: 99%

“…The design of risk mitigation measures at detailed scale (> 1:2000) requires input data of high quality and quantity. In particular, with reference to a given typified landslide, the knowledge of (1) the geometry and kinematics of the landslide, (2) the hydraulic and geotechnical properties of involved soils along with their stratigraphic asset, (3) the pluviometric characteristics of the area and the groundwater regime, is a prerequisite for the generation of a reliable geotechnical slope model and, therefore, for a correct application of limit equilibrium and/or numerical methods (e.g., Finite Elements Methods implementing suitable constitutive laws) aimed at modeling the different processes governing the slope stability (Cotecchia et al 2016;Gullà et al 2018). Once the triggering factors are known, the choice of the most suitable stabilization work can be associated with the evaluation of the increase of the factor of safety that, with respect to the occurrence of a failure mechanism, occurs in the transition from the condition of pre-to post-intervention (Ng et al 2002).…”

Section: Detailed Scalementioning

confidence: 99%

A multi-scale methodological approach for slow-moving landslide risk mitigation in urban areas, southern Italy

Ferlisi

Gullà

Nicodemo

et al. 2019

Euro-Mediterr J Environ Integr

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Several urban areas in Euro-Mediterranean countries are affected by slow-moving landslides that, even if rarely associated with the loss of human life, can cause damage to structures and infrastructure. In such contexts, the progressive decay of the built environment can bring along a generalized increase of the physical vulnerability and, as a result, slow-moving landslide risk increases over the time. Under these conditions, as long as suitable risk mitigation measures are lacking, the level of risk (also related to earthquakes) could turn out to be no longer acceptable within an a priori unknown time interval. This problem has a relevant social-economic impact, thus requiring the adoption of risk mitigation strategies that need to be effective and, at the same time, sustainable for the involved stakeholders. In this regard, this paper proposes a multiscale methodological approach-based on the joint use of satellite-derived displacement monitoring data and the results of building damage surveys-whose applicability is tested with reference to urban areas affected by slow-moving landslides in Calabria region (southern Italy).

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Geo‐hydro‐mechanics for quantitative landslide hazard assessment (QHA)

2018

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Landslide risk represents a strong limitation to the social and economic development of civil society in chain areas. This is particularly the case in highly urbanized regions. The need for mitigation of landslide risk prompts landslide hazard mapping. The aim of the research work presented in the paper is the use of geo‐hydro‐mechanics for the assessment of landslide hazard from the site to the small scale. The geo‐hydro‐mechanical analysis of landslide hazard is first presented to diagnose single slope. To this aim, the procedure for the deterministic analyses of the internal/external slope factors and of the possible landslide processes bringing about instability is presented. The contribution offers an overview of the key steps of the deterministic procedure with the phenomenological interpretation of a landslide mechanism as first, and the numerical validation thereafter. A representative case study of application of the methodology is discussed. The case study is representative for chain slopes in the Italian Apennines and exemplifies the geo‐hydro‐mechanical diagnosis of landslide hazard in complex geological contexts. As second, a methodology for intermediate to regional scale landslide hazard assessment, based on geo‐mechanical interpretations, is also recalled. The methodology is the Multiscalar Method for Landslide Mitigation, MMLM (Cotecchia et al. 2016b; Cafaro et al. 2016). It uses the hydro‐mechanical diagnoses of landsliding at the slope scale as reference starting point. In this contribution, a brief example of the validation of the MMLM to the geologically complex Daunia‐Lucanian Apennines (Italy) is also shown.

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From a phenomenological to a geomechanical approach to landslide hazard analysis

Cited by 38 publications

References 31 publications

Effects of Soil-Vegetation-Atmosphere Interaction on the Stability of a Clay Slope: A Case Study

Effects of Soil-Vegetation-Atmosphere Interaction on the Stability of a Clay Slope: A Case Study

A multi-scale methodological approach for slow-moving landslide risk mitigation in urban areas, southern Italy

Geo‐hydro‐mechanics for quantitative landslide hazard assessment (QHA)

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