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Authored
3 records found
On the design of bank revetments at inland waterways subjected to ship-induced water level drawdown
A probabilistic infinite slope analysis
To protect embankments along German inland waterways against local slope sliding failure caused by ship-induced water level drawdown, they are mainly secured by bank revetments. Often, large embankment sections are designed on the basis of a limited number of field and laboratory
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Modelling the multiscale behaviour of claystone
Deformation, rupture, and hydro-mechanical phenomena around underground galleries
In the context of underground exploitation, the behaviour of rocks near galleries and tunnels conditions their stability. Underground drilling generates deformations, damage, fracturing, and significant modification of flow characteristics in the surrounding rock. However, the in
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Variability in spatial distribution of mineral phases in the Lower Bowland Shale, UK, from the mm- to μm-scale
Quantitative characterization and modelling
The microstructure of a highly laminated Lower Bowland Shale sample is characterized at the micron-to millimeter scale, to investigate how such characterization can be utilized for microstructure-based modelling of the shale's geomechanical behavior. A mosaic of scanning electron
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Contributed
17 records found
Geotechnical Seismic Design Code Calibration
A probabilistic study of seismic design code safety
Seismic design codes are currently moving from a force-based design approach to a performance-based design approach. For example, in a performance-based design approach it could be specified how many lanes must be available during the lifetime of a bridge given a certain earthqua
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Schematization uncertainties in the macrostability safety assessment
Case study for primary dikes in the Alblasserwaard
The current macrostability safety assessment for primary river dike trajectories in the Netherlands is applied to approach the failure probability of a dike during high water events. However, in the current schematization process that is described in the Wettelijk Beoordelings In
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Deeper piping erosion
Finding how to model it and what contributes to the emergence of a deeper pipe
The Netherlands is a country that is being
threatened by water, both from the rivers and from the sea. The Dutch have
built dikes to keep their lands from inundation. To ensure the strength and
stability of these dikes, they are being assessed on the basis of several
failure mech
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Verification, Validation and Application of the NorSand Constitutive Model in PLAXIS
Single-stress point analyses of experimental lab test data and finite element analyses of a submerged landslide
As the construction of sub-aerial and submarine geotechnical structures increase in amount, rate and size, so do their associated risks. Often, with use constitutive models, finite element analyses (FEAs) are performed in order to identify and mitigate these risks. NorSand, which
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Integral Probabilistic Reliability Assessment for Flood Defences
The Impact of Correlations
Since 2017, Dutch flood defences are assessed according to
new safety standards. These standards are based on flooding probabilities and
rely on several assumptions and approximations. There are concerns that the
combination of these assumptions leads to conservative results. Rec
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Assessment of macro-instability using SHANSEP in RFEM
The application of SHANSEP in combination with RFEM for safety assessment of dikes.
The Dutch Water board revised their guidelines for the safety assessment of dikes in 2017. A major change for the assessment of macro-stability is the use of the SHANSEP method to estimate the strength of impermeable cohesive layers. The failure probabilities are estimated with a
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The increase of dike stability due to unsaturated soil strength
A study of the spatially and temporally varying presence of matric suction
River dikes in the eastern part of the Netherlands are characterized by a relatively low daily water table. In the unsaturated zone above the water table, a negative pore pressure (matric suction) is present that binds the soil particles together. Suction can be especially large
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Reliability Studies of Slope Stability
Effect of various approaches to derive distributions of soil properties in reliability studies of slope stability
In the past few decades, the use of Bayes' theorem in geotechnical engineering has increased significantly. A good amount of work is done on implementing this theorem for improving the knowledge on soil properties, identification of soil strata, and quantifying different uncertai
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Schematization of shear strength
The influence of the schematization of the shear strength on the macro-stability safety assessment
The Water Authority Rivierenland is responsible for periodically assessing the safety of the dike trajectories in the Alblasserwaard region. In 2012, the safety assessment for inner slope macro-stability was performed based on stress dependent design values for the shear strength
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The reconstruction of Riskeer
WBI2017 assessment tool focused on hydraulic structures
The reliability assessment of hydraulic structures, in primary water defences before 2017, is characterised by exceedance probabilities and implicit uncertainty. In January of 2017, the new water law enforces a change in the assessment of primary water defences. The water law req
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Flood Risk Assessment Isiolo River Basin, Kenya
Feasibility of the SLAMDAM in the Isiolo River Basin using the FIS Tool
This report provides a flood risk assessment of the Isiolo River Basin, in collaboration with Nelen & Schuurmans (3Di, FIS Tool) and Zephyr Consulting (SLAMDAM). This flood risk assessment includes a study of the current flood risk management in Kenya, and in the Isiolo River Bas
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Reliability Benchmarking of Eurocode 7 Design Examples
CIE5050-09: Additional Thesis Project 2021
The application of reliability analysis in geotechnical engineering is relatively new compared to the other sections of civil engineering such as structural engineering and hydraulic engineering. However, due to its increases use in recent years, reliability analysis is planned t
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A cohesive-frictional mechanical constitutive law for zero-thickness interface elements
Expanding the cohesive zone model by including friction to better model fracture development along discontinuities in geomaterials
Discontinuities have an important influence on the bulk behaviour of geomaterials. Discontinuities can be physical openings like fractures and joints, interfaces between different material types, or zones with different material behaviour like mortar or reinforcement material. Bu
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An analysis of the influence of the flood duration on slope stability
What is the influence of the flood duration on slope stability and in what degree affects the flood duration the design?
In most current dike assessments only the stationary water levels are investigated in the assessment of the stability of the inner slope, while there are differences for all kind of dikes between the stationary and transient pore water pressures and therefore in the stability. Th
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In this master thesis the current Dutch method of combining failure probabilities at different spatial scales is researched. This method is used in the Dutch flood risk analysis of earthen dikes to assess the probability of flooding. Currently, probabilities of flooding for geote
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Site characterization is indispensable in the design phase of geotechnical engineering projects. As a key factor in site characterization, the characterization of soil undrained shear strength (Su) is always in the spotlight. Various methods, including laboratory and in-situ test
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Levees are earthen structures that are designed to protect land from flooding and are commonly composed of impervious soils and built on sandy foundations. They are sensitive to an erosion process that is known as piping. After several years of investigation into piping, Sellmeij
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