| 1. |
- Alfredsson, Magnus, et al.
(författare)
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Funktionskriterier för vägkonstruktioner : Förstudie
- 2010
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Det projekt som här rapporteras har som syfte att identifiera och beskriva de svårigheter och möjligheter som totalentreprenader medför, respektive erbjuder, för alla parter. Målet är att utveckla totalentreprenader på ett sådant sätt att branschens effektivitet ökas. Denna rapport är en förstudie där det studerats vilka krav som byggherren ska ställa på utföraren av en vägkonstruktion i en totalentreprenad med funktionsansvar och hur utföraren ska verifiera kraven. Arbetet har genomförts med medlemmar från olika aktörer i branschen och omfattat främst litteraturstudier och intervjuer. Kunskaper och erfarenheter har sammanställts och analyserats för att slutligen kondenseras ned till ett antal förslag till fortsatt arbete.Förstudien har pekat ut ett antal områden som viktiga för att påskynda framtida utveckling av totalentreprenader:Terminologi – idag råder viss begreppsförvirringAnalys av funktionella krav i tidigare projektTrafikantkravMiljökravUtveckling av funktionella krav i samverkanVäghållarekonomiRegelbetingade begränsningar av funktionella kravUppföljning och underlättande av erfarenhetsackumuleringImplementering av nya mått och mätmetoder
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| 2. |
- Carlsson, Mats, et al.
(författare)
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On risk management in large infrastructure projects
- 2005
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Ingår i: Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering, Vols 1-5. - 9789059660274 ; , s. 2785-2788
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Konferensbidrag (refereegranskat)abstract
- Large infrastructure projects are in general unique as the conditions and demands vary from one project to another. Furthermore, these projects are often related to risks of different nature due to high technological level, high environmental, public and political focus, long lead and project times, large and complex organizations, complex contracts etc. This paper aims to give some guidelines how to perform a successful management of risks in a large infrastructure project. The main conclusion is that the key to a successful risk management in a large infrastructure projects is early planning and a strict and continuous execution during the entire life-cycle of the project. Good planning and control of the risks enable an organized, comprehensive and iterative approach for identifying and evaluating the risks and give handling options necessary to optimize the project strategy. The management of risks should be performed as early as possible in the life-cycle of a project in order to ensure that critical risks are incorporated into the project plan and addressed with mitigation actions.
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| 3. |
- Deckner, Fanny, et al.
(författare)
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Aspects of Ground Vibrations due to Pile and Sheet Pile Driving
- 2015
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Ingår i: Electronic Journal of Geotechnical Engineering. - : E-Journal of Geotechnical Engineering. - 1089-3032. ; 20:19, s. 11161-11176
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Tidskriftsartikel (refereegranskat)abstract
- Vibrations due to pile and sheet pile driving are part of a complex process involving several factors that influence both vibration magnitude and frequency. Better understanding and prediction of the vibrations generated will greatly benefit the civil engineering practice as well as the construction industry. An important component in understanding vibrations due to pile driving is to comprehend and understand working procedures and the influence of different factors. The objective is to present and discuss factors and working procedures that influence vibrations caused by pile driving, based on three current field tests and formerly presented experience from literature. It is concluded that the factors have the highest impact on ground vibrations due to pile driving are the geotechnical conditions, the vibration generated at the source, the distance from the source and the installation method.
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| 4. |
- Deckner, Fanny, et al.
(författare)
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Factors influencing vibrations due to pile driving
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Vibrations due to pile and sheet pile driving are part of a complex process involving many elements and factors that influence both vibration magnitude and frequency. Better understanding and prediction of the vibrations generated will greatly benefit the civil engineering practice as well as the construction industry. An important component in understanding vibrations due to pile driving is to comprehend and recognise the factors that influence these vibrations. The objective of the present study is to identify factors that influence vibrations caused by pile driving. Furthermore, current models for prediction of vibrations are discussed and evaluated. Based on the literature study conducted it is concluded that the most important factors are the geotechnical conditions, the energy generated at the source and the distance from the source. The identified factors should be included in order to create a reliable prediction model for vibrations caused by pile and sheet pile driving
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| 5. |
- Deckner, Fanny, 1984-
(författare)
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Ground vibrations due to pile and sheet pile driving : influencing factors, predictions and measurements
- 2013
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Ground vibrations due to pile driving are part of a complex process. Vibration is generated from the pile driver to the pile. As the pile interacts with the surrounding soil, vibrations are transferred at the pile-soil interface. The vibration propagates through the ground and interacts with structures, both above ground and underground. The vibration continues into the structure where it may disturb occupants and/or damage the structure.In this thesis the study of the vibration transfer process due to pile driving is limited to the vibration source and the wave propagation in the soil. Vibration transmission to adjacent buildings and structures is not studied. However, impact of vibrations on buildings is briefly discussed in the literature study.It is important to accurately predict the magnitude of ground vibrations that result from pile driving in urban areas, both over- and underestimated vibration levels lead to increased costs. A lot of research has been performed within this field of knowledge, but a reliable and acknowledged prediction model for vibrations induced by pile or sheet pile driving is still needed.The objective of the research project is to increase the knowledge and understanding in the field of ground vibrations due to impact and vibratory driving of piles and sheet piles. This research project also aims to develop a reliable prediction model that can be used by practising engineers to estimate vibration due to pile driving. This licentiate thesis presents the first part of the research project and aims to increase the knowledge and understanding of the subject and to form a basis for continued research work.The most important findings and conclusions from this study are:The main factors influencing vibrations due to pile and sheet pile driving are; (1) the vibrations transferred from the pile to the soil, (2) the geotechnical conditions at the site and (3) the distance from the source.The vibrations transmitted from the pile to the soil depend on the vibrations transferred to the pile from the hammer, the pile-soil interaction and the wave propagation and attenuation in the plastic/elasto-plastic zone closest to the pile.There is today no prediction model that fulfils the criteria of the “perfect” prediction model; reliable but yet easy to apply.Future research should study the transfer of vibrations at the pile-soil interface, including the generation of a plastic/elasto-plastic zone in the area closest to the pile and how that affects the transfer of vibrations from the pile to the soil.
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| 6. |
- Deckner, Fanny, 1984-, et al.
(författare)
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Ground vibrations due to pile and sheet pile driving : prediction models of today
- 2012
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Ingår i: Proceedings of the 22nd European Young Geotechnical Engineers Conference. - Gothenburg : Swedish Geotechnical Society. - 9789163714351 ; , s. 107-112
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Konferensbidrag (refereegranskat)abstract
- As part of aconstruction work pile and sheet pile driving unavoidably generates vibrations.As of today construction works are often located in urban areas and along withsociety’s increasing concern of environmental impact the need for vibrationprediction prior to construction is of immediate interest. This study presents a review of the predictionmodels existing today. For prediction of ground vibrations from pile and sheetpile driving there are roughly three different types of models; empirical models,theoretical models and engineering models. A prediction model should bereliable in all cases where it is meant to be used. It is also important thatit is relatively easy to use and that the input data is easily obtained. Thisstudy concludes that, as of today, there is a lack of such a model. Today’smodels either lack in reliability or require great amounts of input data,knowledge and skills as well as time and money. The findings within this study constitutethe initial part of an on-going research project at the division of Soil- and RockMechanics at the Royal Institute of Technology in cooperation with the DevelopmentFund of the Swedish Construction Industry and NCC Construction Sweden.
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| 7. |
- Deckner, Fanny, et al.
(författare)
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Instrumentation System for Ground Vibration Analysis During Sheet Pile Driving
- 2015
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Ingår i: ASTM geotechnical testing journal. - : AMER SOC TESTING MATERIALS. - 0149-6115 .- 1945-7545. ; 38:6
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Tidskriftsartikel (refereegranskat)abstract
- To enable the study of the sheet pile-soil interaction during driving, it was essential to have a record of the sheet pile vibrations as well as the vibrations at depth in the surrounding soil. In this paper, an instrumentation system for vibration analysis during vibratory sheet pile driving was presented. The instrumentation system was used in a full-scale field test where vibrations were measured on the sheet pile as well as at depth in the ground. The new instrumentation system and the field test were thoroughly described. As a sheet pile was driven into the ground, vibrations were transferred both at the toe and along the shaft. Whether it was the toe or the shaft that created the largest contribution to vibrations in the ground is debated in literature. Results from the field test were presented in order to investigate the effect of the position of the sheet pile toe on the ground vibrations at depth. It was shown that, within a distance of about 1.6m from the driven sheet pile, the ground vibrations at depth were affected by the passing of the sheet pile toe. The current field test also indicated that the toe contributed to more ground vibrations than the shaft.
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| 8. |
- Deckner, F., et al.
(författare)
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Major vibration source during vibratory sheet pile driving – Shaft versus toe
- 2019
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Ingår i: 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings. - : International Society for Soil Mechanics and Geotechnical Engineering. - 9789935943613
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Konferensbidrag (refereegranskat)abstract
- Due to increasing demand to maintain vibration levels below strict limits during construction, it is important to develop a better understanding of how vibrations emanate from the shaft and the toe during vibratory sheet pile driving. It is still unclear whether it is the shaft or the toe that contributes the most regarding induced ground vibration levels. A sheet pile shaft has a significantly larger area compared to the toe area. It is therefore expected that the shaft would contribute the more significantly. However, results from full scale field studies have shown that the sheet pile toe also has a large influence on ground vibration levels as the toe passes measurement points buried in the ground close to the vibrodriven sheet piles. This paper employs a numerical model developed to investigate the hypothesis that most of the ground vibrations emanate from the shaft during vibratory sheet pile driving. The results indicate during driving in clay the contribution from the toe and shaft to ground vibration depends on the sheet pile penetration depth, with the shaft dominating vertical ground vibrations for large penetration depths.
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| 9. |
- Deckner, Fanny, et al.
(författare)
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Markvibrationer vid spontning för Karlstad teater
- 2013
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Ingår i: Bygg och Teknik. - Stockholm : Förlags AB Bygg & teknik. - 0281-658X .- 2002-8350. ; :1, s. 25-29
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 10. |
- Deckner, Fanny, et al.
(författare)
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Measured ground vibrations during vibratory sheet pile driving
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The installation of piles and sheet piles in the vicinity of existing foundations requires the engineer to predict the environmental impact on nearby structures and buildings. In the presented case study an extension of Karlstad theatre was planned, the theatre and surrounding buildings are founded on loose geological deposits close to the river delta of Klarälven. The uncertainty in predicting the environmental impact on the theatre and adjacent buildings led to the decision of performing a trial sheet piling using vibratory driving. The generated ground vibrations as well as the settlement of the ground surface were measured. The results of the measurements showed that large settlements occurred in the loose sand layer. It was also observed that the horizontal vibrations were larger than the vertical vibrations close to the driven sheet piles. From the field study it was concluded that geotechnical conditions as well as distance from the source have large impact on the generated vibrations. A comparison between measured and predicted vibrations using empirical relations gave valuable insights for the development of future prediction models.
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