Wyniki wyszukiwania - Biblioteka Nauki

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Numerical modelling of the landslide processes using discontinuous approach

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Zabuski L. , Marcato G.

Polish Geological Institute Special Papers

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2005

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tom Vol. 20

119--124

EN

Principles and examples of discontinuous numerical modelling of the landslide slopes are presented in the paper. In many cases, rock mass is composed of relatively strong and competent rock blocks, which are intersected with discontinuities, such as joints, faults, fault zones, bedding planes, etc. Deformation process of such system is modelled numerically, using UDEC (Universal Distinct Element Code) computer programme. This approach is explained in the paper, and two examples of numerical simulation of the landslide development illustrate its main features. The first example is concerned with the landslide modelling in a diabase quarry, whereas the second one presents the simulation of the process in the Italian Dolomites. The results prove the appropriateness and usefulness of the discontinuous modelling approach.

PL

W artykule przedstawiono zasady i przykłady numerycznego modelowania zboczy podatnych na osuwiska metodą elementów oddzielnych. W wielu przypadkach skały budujące te zbocza składają się ze stosunkowo wytrzymałych i zwięzłych bloków pociętych nieciągłościami, takimi jak spękania, uskoki, strefy uskokowe, płaszczyzny warstwowania itp. Proces deformowania takiego systemu przemodelowano numerycznie, przy użyciu programu komputerowego UDEC, co wyjaśniono na przykładzie dwóch symulacji numerycznych rozwoju osuwisk. Przykład pierwszy dotyczy modelowania osuwiska w kamieniołomie diabazu, natomiast drugi przedstawia symulację procesu osuwiskowego we włoskich Dolomitach. Uzyskane wyniki udawadniają właściwość stosowania modelowania metodą elementów oddzielnych i jego przydatność w tego rodzaju badaniach.

2

Analiza procesów deformacji zboczy z uwzględnieniem nieciągłego charakteru masywu

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Zabuski L. , Marcato G.

Przegląd Geologiczny

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2014

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tom Vol. 62, nr 6

308--316

EN

Principles of the rock massif modelling of the slopes as a discontinuous medium and examples of the numerical simulations of the deformation processes in such a medium are presented in the paper. The massif is modelled as a set of blocks, contacting themselves along the joints, so called "interfaces". Four examples of the deformation processes on the slopes using distinct element model and numerical code UDEC are described. The first example concerns the group of the rock blocks in Sudety Mts. The second presents the principles and the results of the slope deformation analysis in Carnian Alps in Italy, whereas in the third one the analysis of the landslide deformations of the rock wall in diabase quarry is presented. Fourth example concerns the analysis of the soil embankment. The possibilities, advantages and disadvantages of the discontinuous approach in jointed rock and soil media modelling are discussed. Popularisation of the discontinuous approach is suggested.

3

Influence of the Geometry Alteration of the Landslide Slope on its Stability: A Case Study in the Carnian Alps (Italy)

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Zabuski L. , Bossi G. , Marcato G.

Archives of Hydro-Engineering and Environmental Mechanics

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2017

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tom Vol. 64, nr 2

101--114

EN

The paper presents the principles of the slope reprofiling and proves the effectiveness of this stabilization measure. The case study of two adjacent landslides in the National Road 52 “Carnica” in the Tagliamento River valley, the Carnian Alps (462304900N, 124205100E) are the example allowing for illustration of this approach. The phenomena have been studied for more than a decade, making it possible to carry out a detailed geological and geomorphological reconstruction. That was done on the basis of a large amount of monitoring data collected during that period. Since the landslides are threatening an important road, countermeasure works to ameliorate the stability conditions of the slides need to be designed. The paper focuses on the creation of a numerical model consistent with monitoring data and capable of reconstructing the dynamics of both landslides. Two cross-sections, one for each landslide, were selected for the analysis. The geometry of the slip surface was determined on the basis of control points, such as slip surface readings from inclinometers, and geomorphological evidence for the contour. The FLAC2D code was used to evaluate the current stability of these landslides and to determine the effectiveness of changing the slope geometry by removing material from the upper part of the slope and putting it to the lowest part as reinforcement.