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Analysis of constitutive models for peat under deviatoric loading

Camino Rios, Alberto (author)

The comprehensive assessment of the deviatoric behaviour in peats is paramount in ensuring the resilience of soil structures. The understanding of this material is riddled with intricacies, given its highly complex fabric, which includes organic matter such as fibers. This thesis evaluates the capabilities of a recent constitutive model (JMC) to...

master thesis 2023

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A critical review of arsenic occurrence, fate and transport in natural and modified groundwater systems in The Netherlands

Stuyfzand, Pieter Jan (author), Bonte, Matthijs (author)

Arsenic is a common trace element in groundwater and its fate and transport are controlled by combination of (i) natural processes, including redox conditions, salinity and pH, (ii) sedimentary and geochemical environment, and (iii) anthropogenic influences such as groundwater extraction, managed aquifer recharge (MAR), Aquifer Thermal Energy...

journal article 2023

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(re)Carbon City: Westergouwe as example of living in a wetland in the western Netherlands

van Oevelen, Lotte (author)

As the climate is changing, the need to mitigate and adapt to the climate is getting more urgent every day. One of the biggest causes of global warming is the greenhouse gas carbon dioxide. Simultaneously, we are destroying one of our biggest carbon sinks; our peat soil. Peat soil in the Netherlands is destroyed by the Dutch polder system and...

master thesis 2022

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Testing and modeling of sheet pile reinforced dikes on organic soils: Insights from the Eemdijk full-scale failure test

Lengkeek, H.J. (author)

The Netherlands is inherently challenged by water, as a large part of the country lies below sea level and several major rivers in North-western Europe cross the country. The most prevalent form of protection from coastal and river floods in the Netherlands includes approximately 22,000 km of earthen dikes, of which 3800 km are primary flood...

doctoral thesis 2022

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Consequences of drying on the hydro-mechanical response of fibrous peats upon compression

Zhao, H. F. (author), Jommi, C. (author)

Peats are encountered in waterlogged deltaic areas, where degradation is delayed by favourable environmental conditions. The recent increase in frequency and severity of droughts is expected to accelerate peat degradation, in turn increasing subsidence and flood risk, urging better understanding of the response of peats to drying events. To...

journal article 2022

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Collaboration through a game: A design-based research on the controversy in the case of peat meadow areas in the Netherlands

van Liemt, Julia (author)

A fair part of the surface of the Netherlands consists of peat grounds. A large part of these grounds is used for livestock farming. However, the peat needs to be dried to prevent cows and other cattle from sinking with their hooves into the soft, wet peat. This drying starts a process called oxidation. This reaction with oxygen in the air and...

master thesis 2021

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Food forests on peat soil: An exploration and assessment of the potential of a food forest on peat soil in the Vrouwe Vennepolder in the Netherlands

Lucker, Ceriel (author)

Food forests are gaining attention in the Netherlands as a concept that holds the promise of delivering a variety of ecosystem services our society depends upon. However, there are no insights available what a food forest could look like on peat soils nor what its environmental benefits could be. At the same time the Dutch peat area represents...

master thesis 2021

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Detecting local surface motion of pas­tures on peat soils using laser scanning technology

Li, Ze (author)

Subsidence can be observed at various locations in the Netherlands. While it can be due to both shallow and deep subsurface processes, the shallow subsidence is mainly a result from compaction, oxidation and/or groundwater drainage. Moreover, for grasslands on organic soils, in particular pastures on drained peat soils, the vertical position of...

master thesis 2021

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Developing a constitutive approach for peats from laboratory data

Jommi, C. (author), Chao, C. (author), Muraro, S. (author), Zhao, H.F. (author)

Recent research effort carried out at Delft University of Technology to improve the experimental knowledge and develop a comprehensive modelling approach for fibrous organic soils is summarised. Experimental results and numerical analyses are combined to discuss some contradictory results which have delayed advanced characterisation of peats....

journal article 2021

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Secondary settlement of dikes in peat areas based on CPTu

Dick, Joost (author)

This study aims for a software tool that predict secondary settlements in soft layers on which secondary dikes are founded based on cone penetration test data. In the literature study five equations have been found that relate cone resistance and friction ratio to volumetric weight and over consolidation ratio. With the volumetric weight and...

bachelor thesis 2020

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Drowning Deltas: A strategical spatial approach to soil subsidence in delta regions

Claassen, Teun (author)

Delta cities all around the world are under pressure from different forms of climate change effects. Soil subsidence as a result of peat oxidation, and anthropogenic loading of the soil. The soil in many of the heavily urbanised deltas around the world is subsiding faster than the see level is rising as a result of climate change. Few people are...

master thesis 2020

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Pre-failure behaviour of reconstituted peats in triaxial compression

Muraro, S. (author), Jommi, C. (author)

This paper discusses the results of an experimental programme designed to investigate the deviatoric behaviour of peats. The results are obtained from triaxial experiments carried out on reconstituted peat samples. The interpretation of the experimental results follows a hierarchical approach in an attempt to derive the ingredients that an...

journal article 2020

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Remaking "Nature": An Ecological Transition Towards A Sustainable Landscape

Liu, Danyan (author)

Wetlands are the most important ecosystems on Earth, which can be found in many parts of the world. However, demand for food and economic development in the last century had driven many wetlands in the world being completely drained for cultivation and to the extent that no longer retain any natural wetland characteristics such as the Everglades...

master thesis 2019

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Imaging peat using neutron and X-ray CT

Dicker, Sjors (author)

Peat is formed by biochemical processes and the accumulation of the soil depends on the aerobic and anaerobic conditions. The soil covers five to eight percent of the land surface of the earth. For this thesis a peat coming from a site called Markermeeer, which is a lake between the provinces Noord-Holland and Flevoland in the Netherlands, is...

master thesis 2019

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The deviatoric behaviour of peat: a route between past empiricism and future perspectives

Muraro, S. (author)

The geotechnical description of peats represents one of the main challenges in the Netherlands to assure the required safety standard and performance of the flood defence infrastructure. Almost a third of the country is situated below the sea and the rivers level with about 60% to 70% of the population and economic assets concentrated in low...

doctoral thesis 2019

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Advances in Modelling the Deviatoric Response of Peat

Chatzis, Konstantinos (author)

The term peat is commonly used to describe organic soils, composed of fragmented plant remains and fibers. Despite the extensive research on the behaviour of peat during the last 50 years, the vast majority of the attention was devoted to the volumetric behaviour. Only few attempts are reported to model the deviatoric behavior of peat, which is...

master thesis 2018

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Conceptual models for short-eccentricity-scale climate control on peat formation in a lower Palaeocene fluvial system, north-eastern Montana (USA)

Noorbergen, Lars J. (author), Abels, H.A. (author), Hilgen, Frederik J. (author), Robson, Brittany E. (author), de Jong, Edwin (author), Dekkers, Mark J. (author), Krijgsman, Wout (author), Smit, Jan (author), Collinson, Margaret E. (author), Kuiper, Klaudia F. (author)

Fluvial systems in which peat formation occurs are typified by autogenic processes such as river meandering, crevasse splaying and channel avulsion. Nevertheless, autogenic processes cannot satisfactorily explain the repetitive nature and lateral continuity of many coal seams (compacted peats). The fluvial lower Palaeocene Tullock Member of...

journal article 2017

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Review and validation of settlement prediction methods for organic soft soils, on the basis of three case studies from the Netherlands

Houkes, C.B. (author)

Organic soft soils pose technical challenges in construction industry due to their extraordinary compressibility and deformability, which is an issue of particular relevance in the densely populated Netherlands, of which more than half of the land surface is covered by such soft soils. Uncertainty and variability in settlement predictions for...

master thesis 2016

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Modelling of Peat Compressed under Sand Bodies: Experimental and Numerical Approach

Papadaki, E. (author)

This study being part of the Weesp Bloemendalerpolder Project, is concentrated on the compression of a peat layer under the weight of a trial sand embankment; examined under two scopes, the laboratory K0-CRS test and the field settlements. Their interconnection is also evaluated. Peat being an organic material with many distinctive...

master thesis 2013

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Field tests for operational shear strength assessment in peat at Uitdam, The Netherlands

Zwanenburg, C. (author)

Stability assessment of existing dikes build on soft soil generates questions on the available stability calculation techniques and material models. Especially peat behaviour is not easily captured by standard design methods. This has led to disapproval, based on calculations, of dikes that have been in operation for several hundreds of years....

conference paper 2012