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Hamburg, Germany

Oumeraci H.,Leichtweiss Institute for Hydraulic Engineering and Water Resources | Staal T.,Hamburg Port Authority AoR | Pfortner S.,Leichtweiss Institute for Hydraulic Engineering and Water Resources | Ludwigs G.,Leichtweiss Institute for Hydraulic Engineering and Water Resources
European Journal of Environmental and Civil Engineering

Polyurethane bonded aggregate (PBA) revetments are highly porous structures made of crushed stones durably and elastically bonded by polyurethane (PU). Despite their advantages compared with conventional revetments and the experience available from more than 25 pilot projects, design formulae to predict their hydraulic performance, wave loading and response are still lacking. Therefore, the paper addresses the analysis of large-scale tests performed in the Large Wave Flume (GWK) of Hanover/Germany. The study aims at improving the understanding of the processes involved in the interaction between wave, revetment and foundation and at developing the missing design formulae for a broad range of wave conditions. The analysis of an observed failure due to transient soil liquefaction under regular waves is also described. © 2012 Taylor & Francis. Source

Rudolph C.,TU Hamburg - Harburg | Mardfeldt B.,Hamburg Port Authority AoR | Duhrkop J.,IMS Ingenieurgesellschaft MbH

In Germany dolphins are commonly designed using a procedure after Blum, 1932, proposed in the EAU 2004. However, internationally the p-y-method is applied more widely for dolphin design. In future, legislature in Germany will change towards allowing the p-y-method besides the Blum-method. For the practioning engineer this raises the question of advantages and disadvantages of both methods. This paper contrasts the underlying principles and presents examples for design calculations to allow for comparison of the two methods. © 2011 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

Due to their high bearing capacity, their economic efficiency and their flexible operation conditions driven open ended piles are a commonly used foundation type. Notwithstanding a wide experience regarding this type of pile, the bearing behavior is not explicitly known. During the construction of the bridges "Niedernfelder Brücken" in the port of Hamburg extensive dynamic pile load tests were carried out at open ended piles with and without reinforcement. The resulting data and experiences gained in this project will be summarized in this paper. © 2011 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

From a European perspective, the port of Hamburg offers the best conditions for sea trade with the growth regions in the East and Far East. The Hamburg Port Authority (HPA) has taken the serious worldwide economic crisis as an opportunity to implement its planned developments for the adaptation of handling and transport infrastructure facilities in good time, so that customers of the port of Hamburg can benefit from ideal conditions in the future upturn. Owing to its important commercial position, and in order to secure this position, the HPA is pursuing a number of measures which are intended to cope with the projected upturn. The overall plan includes a multitude of individual measures; here we want to elaborate on just a few outstanding engineering projects. The idea is to offer a small insight into current and future developments of the port of Hamburg. Copyright © 2012 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

Sothmann J.,Helmholtz Center Geesthacht | Schuster D.,Hamburg Port Authority AoR | Kappenberg J.,Helmholtz Center Geesthacht | Ohle N.,Hamburg Port Authority AoR
6th Chinese-German Joint Symposium on Hydraulic and Ocean Engineering, CGJOINT 2012

The tidal system of the Elbe Estuary has changed significantly in the past. Due to anthropogenic interventions and natural changes flood plains were reduced and the friction of the Elbe Estuary decreased. As a result tidal range and sediment transport increased upstream. Furthermore the tidal wave propagates faster through the estuary and produces an increased tidal range in Hamburg. This leads to a heightening of the flooding risk along the Elbe Estuary. In the framework of the European Project THESEUS the efficiency of five different artificial sandbank scenarios in the mouth of the Elbe Estuary for attenuating the incoming tidal energy by reflection itself or by increasing the friction is investigated by means of a hydrodynamical numerical model. The results show that the effect of sandbanks above mean sea level on the currents and water elevations is rather local, the sandbanks are only relevant during flood-tide, and will not change the hydrodynamics along the Estuary significantly. Another option, the introduction of underwater sandbanks in tidal creeks, seems to be more effective. Source

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