Scale tests on bearing capacity soil displacement (screw) piles
A.J. van der Geest, B.J. Admiraal, P. IJnsen, Geotechnical Engineering No 2, June 2020, page 7
For soil displacement screw piles, the influence of the shape of the screw tip on the pile class factor is debated. To conduct targeted research on the influence of screw tip shape on the failure rate of foundation piles, ten foundation companies joined forces. Pile tests were first carried out at scale, comparing soil displaced, screw-tipped foundation piles with different tip shapes to driven piles in a specially prepared soil profile. Full article
Piling test Glauconite-containing sand and Boom clay at Terneuzen
P. Ganne, J. Couck, A.J. Snethlage, A. Jacobs, Geotechnics No. 2, June 2020, page 20
Prior to the tender for the construction of the New Lock at Terneuzen, piling tests were carried out in 2016. The tests demonstrate the feasibility of the reference design. In addition, the environmental impact of vibration and piling activities, such as noise and vibration, is investigated. This article discusses the main conclusions of the 2016 piling test and includes some points of interest for future piling tests. Full article
Design and construction of pile foundations up to 1991 - Part 2
H. Keijer, Geotechnics No 2, June 2020, page 26
This article covers the design and construction of pile foundations until 1991, when no standards existed for them. This second part covers the early period of calculations from 1952 to 1991, when concrete piles were increasingly used instead of wooden piles. Thanks to the availability of a calculation method based on CPT graphs, it became easier to apply piles with higher loads without having to carry out test loads. Full article
Damage prediction in dyke reinforcement project KIJK
R.R. van Buuren, J.K. Haasnoot, Geotechniek no. 2, June 2020, page 28
The dike reinforcement project Krachtige IJsseldijken Krimpenerwaard (KIJK) consists of a stretch of 10km of dike with 1250 properties on and adjacent to the dike. For this project, an extensive neighbourhood survey was carried out using data from the municipal archives. InSAR satellite measurements were also used. The satellite measurements were used to determine the settlement rate per building, which can be linked to, for example, the foundation type of the building. Simultaneously with the embankment study, several alternatives were designed for the dyke reinforcement task. Full article
Water storage in pavement structures
Y. Dirne, M. Hazenkamp, Geotechnics No 2, June 2020, page 58
Water storage under a tramway is a technical challenge that the City of Amsterdam, GVB and Waternet have taken up. The Rooseveltlaan pilot demonstrated that it is possible to build a tramway on 35% hollow space and also meet the structural requirements of the managers. The pilot project has taught us that we should be cautious about the huge growth in apparent possibilities of water-storage structures under essential parts of Dutch infrastructure. Full article
Application of geosynthetics in GWW: knowledge sharing works better
I. Klein, Geotechniek No 2, June 2020, page 62
NGO promotes knowledge sharing and proper applications of geotextiles and geosynthetics in the Netherlands. On 19 February 2020, NGO organised a joint knowledge afternoon together with Rijkswaterstaat and Prorail. At this knowledge afternoon, a large number of topics were presented on relevant applications of geosynthetics at roads and railway lines. Topics included quality assurance, reinforced soil retaining structures, foundation reinforcement, application of EPS and systems for drainage and vibration damping. Full article