26
May

Vibrocompaction Proposed Design Guideline for Practicing Engineers

Written by Gouw Tjie Liong, Ir., M.Eng, ChFC, PhD. Posted in Geotechnic, GTL Paper, Publication

ABSTRACT

Vibrocompaction is one of the suitable methods to improve liquefiable sand layer. Due to the relatively young age of this technology in Asia, not many engineers are familiar with vibrocompaction design techniques. This paper aims to provide design guidelines for practicing engineers on vibrocompaction. The paper covers the vibrocompaction working principles, its different types, its applicability to soil types, as well as its design and execution methods. Two case studies are presented. The first case study was the application of vibroflotation to compact reclaimed sand up to 17 m thick in Batam, an island nearby Singapore. The reclamation process caused the upper 3 m of sand above the seawater level reached dense condition inducing difficulty for the vibroflot to penetrate and densifying the loose sand below it. The solution to overcome this difficulty is discussed in this paper. The second case study was the densification of 12m thick loose silty fine sand in East Borneo to prevent differential settlement of a 44 m diameter oil tank to be constructed on the site. On this site, a problem was encountered during backfilling, the backfill material could not flow out of the probe. The solution to this problem, and other problems encountered during execution of the project are presented. Conclusions and recommendations drawn from the case studies are presented.
Full Paper Download: GOUW-2019-16ARC_Vibrocompaction Proposed Design Guideline for Practicing Engineers

Gouw Tjie Liong, Ir., M.Eng, ChFC, PhD

Dr. Gouw is a certified Professional Geotechnical Engineer. He has been working in the field of Geotechnical Engineering since 1984. His expertise covering geotechnical investigation, soil instrumentation, deep foundation and excavation for high rise buildings, pile load testing (Static and PDA), pile integrity testing (PIT), sonic logging test, vibration monitoring, slope stability, ground anchors, pumping test, dewatering, micropiles, tunnelling and ground improvement works, e.g. dynamic compaction, vertical drain, vibro-compaction, geosynthetic and grouting. The jobs cover more than 180 projects in Indonesia, Singapore and Srilanka. He has a great passion in the teaching and disseminating of geotechnical engineering knowledge. He serves as lecturer since late 1984. Currently, he serves as Associate Professor at Podomoro University, Jakarta for undergraduate study, and for post graduate students at Universitas Katolik Parahyangan, Bandung, Indonesia. He also conduct regular geotechnical training for engineers. He also chaired the Indonesian Chapter of International Geosynthetics Society since 2006. He has published 80 papers and 22 technical notes.

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