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TC-211 5th Louis Menard Lecture: Ground Improvement of Large Tanks Using Innovative Dynamic Replacement Techniques


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Storage tanks are typically massive, heavily loaded structures that rarely experience bearing failure due to their extensive foundation footprints. Nonetheless, localized shear failure and differential settlements can induce significant ground deformations that can compromise tank serviceability and potentially lead to structural distress. On sites characterized by loose, soft, or compressible soils, pile foundations are traditionally employed; however, ground improvement techniques—particularly dynamic compaction—have emerged as cost-effective and technically viable alternatives. This paper reviews the mechanisms of ground deformation affecting tank performance and presents two case studies illustrating the application of dynamic compaction for tank foundation enhancement: one at the Tsing Yi Tank Farm in Hong Kong, and another at the Palm Jumeirah Sewage Water Treatment Plant in Dubai.

Presenter

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Mr Serge Varaksin, TC211 member, Apageo Scientific Advisor, Menard retired Deputy General Manager

Serge Varaskin was admitted to a work–study program at Northwestern University in Evanston, USA, after completing his civil engineering degree. He earned his master’s degree under Professor Jorj Osterberg and published his research on relative density below the groundwater table in ASTM STP 523.

He joined Menard in 1973 and subsequently dedicated his career to building the company’s global network, advancing the concepts of Louis Menard and Jean Marie Cognon. Serving first as Overseas Manager and later as Deputy General Manager, he played a central role in the international development of the Menard group. Since retiring from Menard in 2014, he has remained scientifically active through contributions to TC211, TC102, the French national project ARSCOP, and through his work as an advisor, expert, and lecturer in ground improvement.

Author of more than 100 international publications, Serge Varaskin has specialized in ground improvement techniques including Dynamic Consolidation, Dynamic Replacement, Vacuum Consolidation, CMC, and Stone Columns, and has advanced the understanding of man made fills that are not normally consolidated. His expertise spans major harbour and airport projects worldwide, and he has delivered numerous keynote lectures at international conferences as well as touring lectures. In 2006, he was appointed Co Chair of ISSMGE TC211 on Ground Improvement. In 2010, he was reconfirmed as Chair and, together with Professor Jan Maertens and Noel Huybrechts, organized the International Symposium on Ground Improvement (IS GI 2012) in Brussels.

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