According to the Danish Energy Agency’s latest projection, the Danish power grid will reach 100% renewable energy no sooner than 2028. However, we can already now see a demand for a more flexible and secure power distribution due to the fluctuating energy production and consumption. Most experts suggest energy storage systems as the most sustainable, ideally suited and lasting solution.
The aim of this project is to develop and test critical parameters for a technology that enables storing energy in water according to the well-known principle of Pumped Hydro Storage (PHS) – but in an underground geomembrane, i.e. by installing a 10 x10 meter mock-up. The project focuses on geotechnical conditions and membrane design and will include the conduction of a range of examinations including the technological adaptation in the energy market in combination with various renewable energy sources and business cases.Beskrivelse
01/09-2020 → 28/02-2022
Soil-membrane interface testing and modelling in connection to underground Pumped Hydro Storage systemBeskrivelse
01/02-2019 → 30/06-2019
DHRTC Radical Innovation Sprint ProjectBeskrivelse
01/09-2018 → 30/11-2018
Industrial PhD project:
According to the Danish National Annex to Eurocode 7, part I, the shaft resistance for a bored cast-in-place pile should not be assumed to be greater than 30 per cent of the shaft resistance of the corresponding driven pile, and the toe resistance is maximised to 1000 kPa. Since 1977 this principle has been enforced (code requirement) in Denmark, allegedly due to execution problems encountered in one or two un-documented case histories.
Hence, it is widely recognised that this reduction in bearing capacity is believed to be overly conservative. If the bored cast-in-place pile is established correct, the reduction of the shaft resistance is still applicable due to limited understanding of the governing mechanism and limited knowledge of the complex soil-pile interaction.
A consequence of this lack of understanding is that bored cast-in-place piles are often designed too conservative, and the bored cast-in-place piles are built more expensive than what is required.
This Industrial PhD project will investigate the shaft and toe resistance of bored cast-in-place piles based on full-scale field tests, model field tests, geotechnical and structural monitoring, and develop a first order analytical method for determination of the shaft (and toe) resistance for bored cast-in-place piles.Beskrivelse
01/06-2018 → 31/05-2021
01/10-2017 → 31/07-2018
Industrial PhD project:
Precast driven piles or cast-in-place bored piles are often used in connection to construction work on sites with soft soil conditions. If the upper layers of soft soil later experience settlement, then the piles will, in addition to the building load, also be affected by a downwards acting force (termed negative skin friction or down drag) resulting from the adhesion between the soil and the pile in those layers which settle relative to the pile.
Hence, a reliable assessment of negative skin friction is a vital part of pile design when piles are installed in soft ground conditions. However, current guidelines and design practice in Denmark are believed to be overly conservative due to limited understanding of the governing mechanism and limited knowledge regarding the effect of pile material and ground conditions on the development of negative skin friction. Especially the influence of bitumen coating on the development of negative skin friction is poorly understood and in Denmark and also generally in the Nordic countries, there exist only very limited documentation to prove the actual effect of bitumen coating.Beskrivelse
01/10-2016 → 30/09-2019
01/02-2012 → 01/05-2013
Verification/investigation into the correlation between the angle of shearing resistance and the plasticity index of heavily overconsolidated Danish claysBeskrivelse
01/02-2012 → 09/01-2013