Practical passive fire protection in TBM driven road tunnels

Fires in tunnels are known for their violent nature, their effects pose a major threat to the tunnel and its users. Protection of the tunnel users against the effects of a fire can be achieved by providing sufficient ventilation combined with prevention of collapse of the tunnel within a period of time. However, tunnel structures are important...

Bentonite cavities in diaphragm walls: Case studies, process decomposition, scenario analysis and laboratory experiments

This report is part of my master thesis research for the master ‘Underground Space Technology’ at the faculty of Civil Engineering and Geosciences at Delft University of Technology. Recent calamities e.g. at Vijzelgracht station, part of the North/South line in Amsterdam, triggered the need for research on diaphragm walls and the occurrence of...

Verbetering door isolatie: Na-isolatie aan de binnenzijde van bestaande woningen

Het doel van dit afstudeeronderzoek is het verkrijgen van inzicht in het ontwerpen van isolatie aan de binnenzijde van verschillende bestaande woningen, rekening houdend met de eisen aan het isolatiepakket en de veranderingen in temperatuurverloop en vochthuishouding die het aanbrengen van het isolatiepakket met zich meebrengen....

Concrete armour units for breakwaters: A study on the structural integrity

One of the most basic types of breakwaters is the rubble mound breakwater which in essence is a heap of stones consisting of a core of fine material covered by an armour layer of big rock or concrete elements. Mostly unreinforced, these concrete elements exist in different sizes and geometries varying from massive concrete cubes to more...

A clay layer as a revetment for sea dikes: The behaviour of clay under wave loading

Environmental awareness and sustainable development have been popular themes over the last few years. To improve dikes along the estuaries in Zeeland (The Netherlands) where a high foreland with natural areas of salt marshes is present, alternatives to stone revetments are examined. From a natural and aesthetic point of view, a slope covered...

Hygro-thermal properties of sheep wool insulation

The primary energy use for house heating has increased strongly in the second half of the previous century. The environmental and economical impact of this high energy consumption has augmented the use of affordable insulation materials which have moderate environmental impact. Sheep wool is one of these natural products which are becoming more...

Duurzame bron of onnodig risico? Verkennend onderzoek naar de mogelijkheid om het secondair effluent van de nieuwe RWZI Amsterdam-West te gebruiken als bron voor de drinkwaterproductie van WLB Amsterdam

Application of timber groynes in coastal engineering

Timber groynes have been used for centuries to retain and control beaches. They are found throughout Europe but little information is available about the design or detailing of the structures. During recent years alternatives such as beach renourishment, detached breakwaters and rock groynes have been used increasingly, however timber groynes...