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Sheet pile behavior during vibratory driving: numerical study based on a field test
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.ORCID iD: 0000-0002-7763-0348
Norwegian Geotechnical Institute.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics. Trafikverket.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
2017 (English)In: Soil Dynamics and Earthquake Engineering, ISSN 0267-7261, E-ISSN 1879-341XArticle in journal (Refereed) Submitted
Abstract [en]

Vibrations due to sheet pile driving are a problem in many urban areas today. Increased knowledgeof the vibration transfer process from source to nearby objects is important in order to enableminimization of induced vibrations. The transfer of vibrations from sheet pile to soil is dependent onthe sheet pile behaviour during driving. This paper presents a 3D finite element study of thebehaviour of a vibratory driven sheet pile, complementing results from a full-scale field test. Thefinite element model accounts for strain dependent soil stiffness using an equivalent linear soilmodel. The conclusion is that the sheet pile bends considerably during driving with eccentricclamping. Furthermore, it is shown that the bending mode is similar irrespective of sheet pilepenetration depth.

Place, publisher, year, edition, pages
2017.
Keyword [en]
sheet pile, vibratory driving, 3D finite element modelling, sheet pile vibrations, ground vibrations
National Category
Geotechnical Engineering
Research subject
Civil and Architectural Engineering
Identifiers
URN: urn:nbn:se:kth:diva-203936OAI: oai:DiVA.org:kth-203936DiVA: diva2:1083076
Funder
SBUF - Sveriges Byggindustriers Utvecklingsfond, 12896
Note

Qc 20170320

Available from: 2017-03-20 Created: 2017-03-20 Last updated: 2017-11-29Bibliographically approved
In thesis
1. Vibration transfer process during vibratory sheet pile driving: from source to soil
Open this publication in new window or tab >>Vibration transfer process during vibratory sheet pile driving: from source to soil
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Alternative title[sv]
Överföring av vibrationer i samband med vibrodrivning av spont - från källa till jord : från källa till jord
Abstract [en]

Vibratory driven sheet piles are a cost-effective retaining wall structure, and in coming decades the continued use of this method will be crucial for minimising costs within the construction sector. However, vibratory driven sheet piles are a source of ground vibrations, which may harm structures or induce disturbance. Most urban construction projects face strict limits on permissible vibration level. Being able to reliably predict the expected vibration level prior to construction is therefore highly important. Reliable prediction demands a profound knowledge of the vibration transfer process, from source to point of interest. This thesis focuses on clarifying the vibration transfer process and will serve as a platform for the future development of a reliable prediction model. The vibration transfer process is divided into two main parts: vibration source and vibrations in soil. The different parts in the vibration transfer process are studied and investigated with the help of a literature review, field tests and numerical modelling. Within the scope of this thesis, three field tests have been conducted and a new instrumentation system has been developed. The new instrumentation system enables recording of both sheet pile vibrations and ground vibrations at depth during the entire driving. The field tests aimed to study the vibration transfer from sheet pile to soil and the vibration transfer within a sheet pile wall, as well as the wave pattern in soil. To study sheet pile behaviour during driving a numerical model was developed, which is also meant to serve as a basis for further studies. The main scientific contribution of this thesis is the identification of the sheet pile behaviour during driving. For practical application, the main contribution is the development of an increased knowledge of the vibration transfer process from source to soil, together with the new instrumentation system and the development of the numerical model.

Abstract [sv]

Vibrodriven spont är en kostnadseffektiv stödkonstruktion och i framtiden kommer den fortsatta användningen av denna metod att vara nödvändig för att minimera kostnader för byggprojekt. Vibrodriven spont är dock en källa till markvibrationer, som kan skada byggnader eller orsaka störningar. De flesta byggprojekt måste förhålla sig till strikta krav gällande vibrationsnivåer. Möjligheten att på ett tillförlitligt sätt förutsäga vibrationsnivåerna innan bygget startar är därför av största vikt. Tillförlitlig prognos av vibrationsnivåer i samband med vibrodrivning av spont kräver god kännedom om vibrationsöverföringsprocessen, från källan till det potentiella skadeobjektet. Denna avhandling fokuserar på att förtydliga vibrationsöverföringsprocessen och fungera som en plattform för framtida utveckling av en tillförlitlig prognosmodell. Vibrationsöverföringsprocessen delas in i två huvuddelar; vibrationskällan och vibrationer i jord. De olika delarna av vibrationsöverföringsprocessen studeras och undersöks med hjälp av litteraturstudie, fältförsök och numerisk modellering. Inom ramarna för denna avhandling har tre fältförsök utförts och ett nytt instrumenteringssystem har utvecklats. Det nya instrumenteringssystemet möjliggör mätning av både spontvibrationer och vibrationer på djup i jorden, under hela neddrivningsfasen. Fältförsöken syftade till att studera vibrationsöverföringen mellan spont och jord, vibrationsöverföringen inom en spontvägg samt vågmönstret i jorden under drivning. För att studera spontens beteende under neddrivning utvecklades en numerisk modell, som också kan fungera som en bas för framtida studier. Avhandlingens huvudsakliga vetenskapliga bidrag är identifieringen av spontens beteende under neddrivning. För praktisk tillämpning är det huvudsakliga bidraget förklaringen av vibrationsöverföringsprocessen från källa till jord, det nya instrumenteringssystemet samt utvecklingen av den numeriska modellen.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2017. 64 p.
Series
TRITA-JOB PHD, ISSN 1650-9501 ; 1026
Keyword
ground vibrations, sheet piles, vibratory driving, vibration transfer process, instrumentation system, field tests, numerical modelling, vibration prediction, markvibrationer, spont, vibrodrivning, vibrationsöverföringsprocessen, instrumenteringssystem, fältförsök, numerisk modellering, vibrationsprognosticering
National Category
Geotechnical Engineering
Research subject
Civil and Architectural Engineering
Identifiers
urn:nbn:se:kth:diva-203946 (URN)978-91-7729-315-6 (ISBN)
Public defence
2017-05-05, Kollegiesalen, Brinellvägen 8, Stockholm, 13:00 (English)
Opponent
Supervisors
Funder
SBUF - Sveriges Byggindustriers Utvecklingsfond, 12896
Available from: 2017-03-20 Created: 2017-03-20 Last updated: 2017-04-07Bibliographically approved

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