Innovative Soft Clay Improvement Technique Using Vacuum and Dynamic Compaction (HVDM)

Robert Y. Liang, S. Xu

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Ground Improvement/Remediation

ABSTRACT: Recent advances in soft clay improvement that involves the use of vacuum dewatering and deep dynamic compaction are described in this paper. The working principles of the series of invention termed fiHigh Vacuum Densification Methodfl are described, followed by a discussion of advantages in terms of cost and time saving. Two case studies are presented to elucidate the practical HVDM process. Detailed observations from instrumentation at the Ningbo Port Project provided in-depth knowledge of the soil improvement mechanisms associated with HVDM.

RÉSUMÉ: Este artículopresentaavancesrecientes en el mejoramiento de arcillassuavesinvolucrando el usode ladeshidrataciónbajovacío yla compactacióndinámicaprofunda. Los principios de operación de la técnicadenominadafiMétodo de Densificación de Alto Vacío-MDAVfl son descritos y lasventajasasociadasaésta en términos de disminución de tiempo y costosson discutidas. Con el fin de elucidar el procesopráctico de operacióndel MDAV, dos casos de estudioson presentados. Elartículoincluyeobservacionesdetalladasde la instrumentaciónutilizada en el proyectodel Puerto de Ningbo, lascualessuministraronelementospara el entendimiento a profundidad de los mecanismos de mejoramiento delsueloasociados con el MDAV.

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