The Important Role of Execution and CQA/CQC Plans in Building with Geosynthetics

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

Matteo Lelli1, Gouw Tjie-Liong2, Riccardo Laneri3, Marco Cerro

Abstract: The use of geosynthetics for the construction of mechanically stabilized earth retaining structures is constantly growing in Indonesia. These structures have shown economic advantages if compared to traditional mass gravity retaining structures. However, the importance of their execution is sometimes underrated. Construction Quality Control and Quality Assurance plans are often meagre and sometimes even missing. Mechanically stabilized earth structures rely on the collaboration between the compacted soil and the geosynthetic reinforcement. If one of these two components is not properly installed or other factors such as drainage system do not comply with the project specifications, unsuitable structure deformations or even failures may occur. This paper aims to share some good construction practices in order to build reinforced earth structures using geosynthetics. Furthermore, the Authors propose some simple but effective testing procedures which can be included in CQC and CQA plans. The scope of this paper is therefore to give guidance to project Owners, Designers and Construction Companies to deliver cost effective, safe and durable geotechnical structures built with geosynthetics.

Full paper download: 171003s-GeonsintetikIndonesia2017

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

Mr. 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 intrumentation, 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 a senior lecturer at Bina Nusantara University, Jakarta, 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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