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Influence of force ratio and frequency on vibratory surface compaction
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Jord- och bergmekanik.ORCID-id: 0000-0002-7361-0729
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Jord- och bergmekanik.ORCID-id: 0000-0001-9615-4861
2016 (engelsk)Inngår i: Geotechnics for Sustainable Infrastructure Development / [ed] Phung Duc Long, 2016Konferansepaper, Publicerat paper (Fagfellevurdert)
sted, utgiver, år, opplag, sider
2016.
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-187311OAI: oai:DiVA.org:kth-187311DiVA, id: diva2:929642
Konferanse
3rd International Conference on Geotechnics for Sustainable Infrastructure Development, Hanoi, 24th-25th Nov 2016, Vietnam
Merknad

QC 20160614

Tilgjengelig fra: 2016-05-19 Laget: 2016-05-19 Sist oppdatert: 2017-08-28bibliografisk kontrollert
Inngår i avhandling
1. Frequency Optimization of Vibratory Rollers and Plates for Compaction of Granular Soil
Åpne denne publikasjonen i ny fane eller vindu >>Frequency Optimization of Vibratory Rollers and Plates for Compaction of Granular Soil
2016 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Vibratory rollers are commonly used for compaction of embankments and landfills. This task is time consuming and constitutes a significant part of most large construction and infrastructure projects. By improving the compaction efficiency, the construction industry would reduce costs and environmental impact.

This research project studies the influence of the vibration frequency of the drum, which is normally a fixed roller property, and whether resonance can be utilized to improve the compaction efficiency. The influence of frequency on roller compaction has not before been studied but the concept of resonance compaction has previously been applied successfully in deep compaction of fills and natural deposits.

In order to examine the influence of vibration frequency on the compaction of granular soil, small-scale compaction tests of sand were conducted under varying conditions with a vertically oscillating plate. Subsequently, full-scale tests were conducted using a vibratory soil compaction roller and a test bed of crushed gravel. The results showed that resonance can be utilized in soil compaction by vibratory rollers and plates and that the optimum compaction frequency from an energy perspective is at, or slightly above, the coupled compactor-soil resonant frequency. Since rollers operate far above resonance, the compaction frequency can be significantly reduced, resulting in a considerable reduction in fuel consumption, environmental impact and machine wear.

The thesis also presents an iterative equivalent-linear method to calculate the frequency response of a vibrating foundation, such as a compacting plate or the drum of a roller. The method seems promising for predicting the resonant frequency of the roller-soil system and can be used to determine the optimum compaction frequency without site- and roller-specific measurements.

sted, utgiver, år, opplag, sider
KTH Royal Institute of Technology, 2016. s. 40
Serie
TRITA-JOB PHD, ISSN 1650-9501 ; 1022
Emneord
compaction, vibratory roller, frequency, resonance, vibration, sand, gravel, soil dynamics
HSV kategori
Forskningsprogram
Byggvetenskap
Identifikatorer
urn:nbn:se:kth:diva-187352 (URN)978-91-7729-042-1 (ISBN)
Disputas
2016-08-26, F3, Lindstedtsvägen 26, Stockholm, 13:00
Opponent
Veileder
Merknad

QC 20160613

Tilgjengelig fra: 2016-06-13 Laget: 2016-05-20 Sist oppdatert: 2016-06-13bibliografisk kontrollert

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