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Spruit, R. (author), van Tol, A.F. (author), Broere, W. (author), Doornenbal, Pieter (author), Hopman, Victor (author)Distributed temperature sensing (DTS) can be used to monitor the production process of diaphragm walls. DTS is able to differentiate between already present or fresh bentonite suspensions during refreshing of the bentonite slurry in the trench. During concrete casting, DTS is able to differentiate between the bentonite suspension and concrete...journal article 2017
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Sadeghi Tehrani, F. (author), Thi Viet Phuong, N. (author), Brinkgreve, R.B.J. (author), van Tol, A.F. (author)In this study, installation of jacked piles in sand is simulated using Press-Replace Method (PRM) and Material Point Method (MPM) and the results are compared together. This comparison is important because a realistic and yet efficient simulation of installation of jacked piles is an appealing step towards the design and analysis of this type of...journal article 2016
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Rui, Rui (author), van Tol, A.F. (author), Xia, YY (author), van Eekelen, SJM (author), Hu, G (author)A trapdoor system has frequently been used to study soil arching and its development in recent years. The load transfer in the fill of piled embankments is very similar to a trapdoor system with multiple trapdoors. There are multiple arching models described in different standards and guidelines for piled embankments that can be subdivided into...journal article 2016
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- Korff, M. (author), Mair, R (author), van Tol, A.F. (author) journal article 2016
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Yao, Y. (author), van Tol, A.F. (author), van Paassen, L.A. (author), Vardon, P.J. (author)To evaluate the disposal technology for fine oil sands tailings, the appropriate engineering properties of the tailings should be ascertained. A laboratory study was conducted by Delft University of Technology (the Netherlands) on the geotechnical properties and dewatering behavior of the fine oil sands tailings (MFT, TT), obtained from Shell...conference paper 2016
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Vardon, P.J. (author), Yao, Y. (author), van Paassen, L.A. (author), van Tol, A.F. (author)This paper presents a comparison between blind predictions of field tests of atmospheric drying of mature fine tailings (MFT) presented in IOSTC 2014 and field results. The numerical simulation of the consolidation and atmospheric drying of selfweight consolidating fine material is challenging and requires significant knowledge of the material,...conference paper 2016
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Vardon, P.J. (author), Yao, Y. (author), Van Paassen, L.A. (author), Van Tol, A.F. (author)Thin-lift atmospheric fine drying (AFD) is a technique used to dewater mine and oil sand tailings, which utilises both self-weight consolidation and atmospheric evaporation. The disposed layers undergo a cyclic drying and rewetting process due to precipitation and deposition of additional lifts on top of the dried layer. The current research...conference paper 2015
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Yao, Y. (author), Van Tol, A.F. (author), Van Paassen, L.A. (author), Vardon, P.J. (author)In the atmospheric fines drying technique, mature fine tailings (MFT) are treated with polymers and deposited in thin layers on a sloped surface for sub-aerial drying. During the whole drying period, the tailings deposits can experience rewetting during periods of rainy weather or as result of the the placement of new layers. This paper...conference paper 2014
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Vardon, P.J. (author), Nijssen, T. (author), Yao, Y. (author), Van Tol, A.F. (author)As a promising technology in disposal of mature fine tailings (MFT), atmospheric fines drying (AFD) is currently being implemented on a commercial scale at Shell Canada’s Muskeg River Mine near Fort McMurray, Alberta. AFD involves the use of a polymer flocculent to bind fine particles in MFT followed by thin lift sub-aerial drying. Upon...conference paper 2014
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Van Eekelen, S.J.M. (author), Bezuijen, A. (author), Van Tol, A.F. (author)Van Eekelen et al., 2012a, Van Eekelen et al., 2012b and Van Eekelen et al., 2013) have introduced an analytical model for the design of the geosynthetic reinforcement (GR) in a piled embankment. This paper further validates this model with measurements from seven full-scale tests and four series of scaled model experiments. Most of these...journal article 2014
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Lupea, C. (author), Thijssen, R. (author), Van Tol, A.F. (author)Offshore wind turbine projects have been characterised by an increase in costs, sizes and distances from shore, EWEA 2012 This created a need of investigating the adequacy of alternative and more fìnancially attractive foundation types such as suction caissons. Within a multi-footing configuration, such as a three-leg jacket structure, these...journal article 2014
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Van Eekelen, S.J.M. (author), Bezuijen, A. (author), Van Tol, A.F. (author)Most analytical models for the design of piled embankments or load transfer platforms with geosynthetic reinforcement (GR) include two calculation steps. Step 1 calculates the arching behaviour in the fill and step 2 the load-deflection behaviour of the GR. A calculation method for step 2 based on the results of model tests has been published by...journal article 2013
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Nguyen, T.C. (author), Van Lottum, H. (author), Holscher, P. (author), Van Tol, A.F. (author)Rapid and static load tests were conducted on open-ended and close-ended piles in the Deltares GeoCentriflige. hi flight, a pile was driven into the soil. Both fme-grained sand and silt beds were tested. Both the rapid and static soil resistances o f a close-ended pile were higher than the soil resistance o f an open-end pile in both sand and...conference paper 2012
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- Dijkstra, J. (author), Broere, W. (author), van Tol, A.F. (author) conference paper 2012
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Van der Meulen, J. (author), Van Tol, A.F. (author), Van Paassen, L.A. (author), Heimovaara, T.J. (author)The extraction and processing of many mineral ores result in the generation of large volumes of fine-grained residue or tailings. These fine sediments are deposited as a slurry with very high water contents and lose water after deposition due to self-weight consolidation. When the surface is exposed to the atmosphere they dry due to evaporation....conference paper 2012
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Yao, Y. (author), Van Tol, A.F. (author), Van Paassen, L.A. (author)When oil sands tailings are deposited in a tailing pond, they settle and segregate to create a layer of stagnant water on top that is reused in oil extraction and a dense mixture of clay, silt and water on the bottom which is referred to as mature fine tailings (MFT). Dewatering of MFT is a problem due to its very high fines content and...conference paper 2012
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Spruit, R. (author), Broere, W. (author), Van Tol, A.F. (author), Hopman, V. (author)In Nederland werden diepwanden beschouwd als een veilige en bewezen technologie voor de kerende constructie van een diepe ontgraving. Door de grote lekkages die zich in de metro bouwprojecten in Amsterdam en Rotterdam voordeden, is de perceptie van het risicoprofiel van de diepwand veranderd.journal article 2012
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Holscher, P. (author), Van Tol, A.F. (author), Huy, N.Q. (author)Centrifiige experiments were carried out to gain insight into the factors that affect the mobilized resistance during rapid load testing on piles in sand. The influence of generated pore water pressure during rapid load tests is shidied, and its effect on the commonly used unloadmg point method to derive the staticpile capacity. This paper...conference paper 2012
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Beijer Lundberg, A. (author), Dijkstra, J. (author), Van Tol, A.F. (author)The use of a geotechnical centrifuge for properly capturing the mechanisms in the sand adjacent to a foundation pile is well established. Larger centrifuge facilities were previously preferred over small centrifuges, because of the difficulties of the required miniature instrumentation. The technology since then has moved on and recent technical...conference paper 2012
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Spruit, R. (author), Hopman, V. (author), Van Tol, A.F. (author), Broere, W. (author)Recent incidents with leaking diaphragm walls during construction of subway lines in Amsterdam and Rotterdam (Netherlands) have led to reconsideration of the diaphragm wall as a retaining wall construction for deep excavations. In our opinion the joints between the panels are the weak spot. During concrete pouring the concrete should replace the...conference paper 2011
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