Reliability analyses of rock slope stability

Vessia, G.; Cherubini, Claudia

doi:10.1201/9780203867310.ch8

Cited by 2 publications

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“…According to Eurocode 7, the following partial factors (Tables A.2 and A.3 in [17]) were added: permanent unfavorable action γ G = 1.0; variable unfavorable action γ Q = 1.3; coefficient of shearing resistance γ Φ = 1.25. Such values are introduced by the Eurocode for limit state design but no suggestions are provided about the way to compute them [19,20].…”

Section: Over-design Factor (Odf) Calculationmentioning

confidence: 99%

Some Remarks on the Use of Deterministic and Probabilistic Approaches in the Evaluation of Rock Slope Stability

Budetta

2020

Geosciences

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The rock slope stability assessment can be performed by means of deterministic and probabilistic approaches. As the deterministic analysis needs only representative values (generally, the mean value) for each physical and geo-mechanical parameter involved, it does not take into account the variability and uncertainty of geo-structural and geo-mechanical properties of joints. This analysis can be usually carried out using different methods, such as the Limit Equilibrium method or numerical modeling techniques sometimes implemented in graphical tests to identify different failure mechanisms (kinematic approach). Probabilistic methods (kinetic approach) aimed to calculate the slope failure probability, consider all orientations, physical characters and shear strength of joints and not only those recognized as kinematically possible. Consequently, the failure probability can be overestimated. It is, therefore, considered more realistic to perform both kinematic and kinetic analyses and to calculate a conditional probability given by the product of the kinematic and kinetic probabilities assuming that they are statistically independent variables. These approaches have been tested on two rock slopes in the Campanian region of Southern Italy affected by possible plane and wedge failures, respectively. Kinematic and kinetic probabilities have been evaluated both by means of the Markland’s test and the Monte Carlo simulation. Using the Eurocode 7, also a deterministic limit equilibrium analysis was performed. The obtained results were compared and commented on.

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Section: Over-design Factor (Odf) Calculationmentioning

confidence: 99%

Some Remarks on the Use of Deterministic and Probabilistic Approaches in the Evaluation of Rock Slope Stability

Budetta

2020

Geosciences

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“…As a result, technological developments for utilizing and processing biomass feedstocks for fuel production have now been the center of attention worldwide. Lignocellulosic biomass is one of the most promising alternatives because of the current large world supply (1.2–1.7 × 10 11 tons per year) of biomass from plants . Lignocellulosic biomass, or biomass that contains cellulose, hemicelluloses, and lignin as the main constituents, is basically the most abundant organic matter derived from agricultural residues, especially in agricultural countries such as Thailand.…”

Section: Introductionmentioning

confidence: 99%

Application of Sulfonated Carbon-Based Catalyst for Solvothermal Conversion of Cassava Waste to Hydroxymethylfurfural and Furfural

Daengprasert

Boonnoun

Laosiripojana

et al. 2011

Ind. Eng. Chem. Res.

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This study aims to investigate the production of hydroxymethylfurfural (HMF) and furfural from cassava waste using a sulfonated carbon-based catalyst and to determine the suitable conditions for the reaction. With the use of the catalyst, the appropriate reaction medium for the production of HMF and furfural was a mixture of acetone/DMSO (70/30% w/w) and water at a ratio of 10/90% w/w. The reaction temperature and time were 250◦C and 1 min, respectively, and the corresponding weight ratio of the catalyst to cassava waste was 0.05:1. Furthermore, the carbon-based catalyst was found to be highly stable and thus can potentially replace the conventional homogeneous acid catalysts such as sulfuric acid for biomass conversion to liquid alkane. Particularly, the catalyst plays an important role in enhancing hydrolysis of cellulose and hemicelluloses and promoting the dehydration of xylose and glucose to form HMF and furfural.

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Reliability analyses of rock slope stability

Cited by 2 publications

References 0 publications

Some Remarks on the Use of Deterministic and Probabilistic Approaches in the Evaluation of Rock Slope Stability

Some Remarks on the Use of Deterministic and Probabilistic Approaches in the Evaluation of Rock Slope Stability

Application of Sulfonated Carbon-Based Catalyst for Solvothermal Conversion of Cassava Waste to Hydroxymethylfurfural and Furfural

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