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Csicsek, A. (author)
The assessment of rock mechanical data is a fundamental step in the process of evaluating the profitability of an open pit mine. The steepness of bench, interramp and resulting overall slope angles have a direct effect on the stripping ratio, therefore on the profitability of the mining operation. With the recently challenging metal prices in...
master thesis 2016
document
Wong, J. (author), Berkelaar, R. (author), Pekelharing, H. (author)
This paper presents an overview of an integral risk management approach with emphasis on the relationships with the costing and scheduling processes. Forms of uncertainty related to project planning are classified and implemented in the probabilistic costing and scheduling processes. Furthermore, the importance of the integral probabilistic...
conference paper 2015
document
Effati Daryani, M.B. (author), Bahadori, H. (author), Daryani, K.E. (author)
The paper contrasts results obtained by the partially factored limit state design method and a more advanced Random Finite Difference Method (RFDM) in a benchmark problem of slope stability analysis with random undrained shear strength parameter. Local Average Subdivision method was used to simulate a non-Gaussian random variable. The key...
conference paper 2015
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Al-Bittar, T. (author), Michael, M. (author), Soubra, A.-H. (author)
In this paper, a probabilistic analysis is presented to compute the ultimate bearing capacity of a strip footing resting on a spatially varying rock mass. The rock is assumed to follow the generalized Hoek-Brown failure criterion. The uniaxial compressive strength of the intact rock (σc) was considered as a random field and the Geological...
conference paper 2015
document
Wong, J. (author), Berkelaar, R. (author), Pekelharing, H. (author)
This paper presents an overview of an integral risk management approach with emphasis on the relationships with the costing and scheduling processes. Forms of uncertainty related to project planning are classified and implemented in the probabilistic costing and scheduling processes. Furthermore, the importance of the integral probabilistic...
conference paper 2015
document
Jonkman, S.N. (author), Mooyaart, L.F. (author), Van Ledden, M. (author), Stoeten, K.J. (author), De Vries, P.A.L. (author), Lendering, K.T. (author), Van der Toorn, A. (author), Willems, A. (author)
The Houston - Galveston area is at significant risk from hurricane induced storm surges. This paper summarizes ongoing studies on flood risk reduction for the region. Firstly, based on a simplified probabilistic hurricane surge model , the return periods of surges within the bay have been estimated. This model framework can be used to assess the...
conference paper 2014
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Nguyen, D.V. (author), Van Gelder, P.H.A.J.M. (author), Verhagen, H.J. (author), Vrijling, J.K. (author)
In order to avoid failure in its lifetime, a breakwater system has to be inspected and, if necessary, has to be repaired. In this paper, a comprehensive maintenance strategy with optimal inspection planning is formulated. Rational maintenance decision-making approaches are discussed. The proposed maintenance strategy combines time-dependent and...
conference paper 2010
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Nguyen, D.V. (author), Van Gelder, P.H.A.J.M. (author), Verhagen, H.J. (author), Vrijling, J.K. (author)
This paper presents a comprehensive maintenance strategy with optimal inspection planning and its application to rubble mound breakwaters. In order to fulfil designated functions, a breakwater has to be inspected during its lifetime and has to be repaired if necessary. Actions of inspecting and repairing form a maintenance strategy. In the paper...
conference paper 2010
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Buykx, S.M. (author), Delfgaauw, S. (author), Bosch, J.W. (author)
The excavation of deep building pits often requires a check against failure by uplift of low permeability ground layers below excavation level. Whenever the weight of these soil layers is less than the pore-water pressure underneath, measures to resist buoyancy are to be considered. The measures most commonly adopted include: decreasing the...
conference paper 2009
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Roubos, A. (author), Verhagen, H.J. (author)
Design formulas for bed protections in the port of Rotterdam were investigated. Using depthsoundings, the actual level of stability of a quay wall can be compared with the design formulas. The loads on a bottom protection differ, because of diversity in shipping and tidal motion. Therefore a better comparison can be made by resembling the...
conference paper 2007
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Janssen, J.W.F.A. (author)
De aanleiding voor dit afstudeerwerk was de constatering van Holland Railconsult dat hun begrotingen vaak lager waren dan het laagste bod bij een aanbesteding en dat zij vermoedden dat er een grotere marge rondom de begroting benodigd is om met een bepaalde betrouwbaarheid het laagste bod te vangen dan men in eerste instantie dacht. Men wilde...
master thesis 2003
document
Verhagen, H.J. (author)
In a classical design approach to breakwaters a design wave height is determined, and filled in into a design formula. Some undefined safety is added. In the method using partial safety coefficients (as developed by PIANC [1992] and recently also adopted by the Coastal Engineering Manual of the US Army Corps of Engineers [CEM [2003]) the degree...
conference paper 2003
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Verhagen, H.J. (author)
In history PIANC has paid quite some attentions to breakwaters, in ancient years results of practical experience have been published in the country presentations at the Conferences, but later some of these papers started to have a more scientific basis. One of the first papers giving a good background on the processes of stability of breakwaters...
conference paper 2002
document
Verhagen, H.J. (author)
One of the major problems in the design of coastal structures is that the design has to be based on very uncertain input data. This implies that the degree of uncertainty is an important value for the designer. In traditional design the uncertainty is not really quantified, but an overall “safety factor” is included. The problem of this approach...
conference paper 2000
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Oumeraci, H. (author), Allsop, N.W.H. (author), De Groot, M.B. (author), Crouch, R.S. (author), Vrijling, J.K. (author)
Final report and appendices of the European project Proverbs on tools for the design of vertical breakwaters (caisson type breakwaters) and similar hydraulic structures in the coastal zone. It includes the loads (waves) as well as the strength of the structure (geotechnial aspects, structural aspects)
book 1999
document
Hussaarts, M. (author)
In dit rapport is getracht op een inzichtelijke en realistische manier de economisch optimale elementdikte van een steenzetting te bepalen. Dit is gebeurd op probabilistische wijze, aan de hand van het bezwijkmechanisme "Instabiliteit van de elementen in de toplaag" Dit bezwijkmechanisme houdt in dat onder bepaalde condities elementen in de...
master thesis 1999
document
Verhagen, H.J. (author)
Basic lecture on risk analysis for the design of coastal structures.
conference paper 1998
document
Chouchena, D.M. (author)
Dit afstudeeronderzoek richt zich op de ontwikkeling van de verwachte kosten van grote waterbouwkundige en infrastructurele projecten en de onzekerheden omtrent deze kosten gedurende de verschillende projectfasen. Uit diverse onderzoeken van het ministerie van Verkeer en Waterstaat [1] blijkt dat kostenramingen van dergelijke projecten vaak...
master thesis 1997
document
Anonymus, A. (author)
The 10 year struggle of the Rijkswaterstaat (State Department of Public Works) and contractors with the task to build a permeable sea defence structure in the Oosterschelde, has been registered in sixteen successive project reports which contain thousands of documents. These documents are sometimes complete part-project papers and sometimes not...
report 1994
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Calle, E.O.F. (author), Dillingh, D. (author), Meermans, W. (author), Vrouwenvelder, A.W.C.M. (author), Vrijling, J.K. (author), De Quellerij, L. (author), Wubs, A.J. (author)
De kruinhoogte van de dijk wordt verkregen door bij de genoemde maatgevende waterstand, een waakhoogte (inclusief de golfoploop) op te tellen. De kruinhoogte van de dijk is echter slechts een van de kenmerkende grootheden van een dijkprofiel. De overige grootheden worden bepaald op grond van eisen met betrekking tot de stabiliteit, de aanleg,...
report 1985
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