This International Symposium on Ground Improvement Technologies and Case Histories (ISGI09), held at the Furama Riverfront Hotel in Singapore from 9–12 December 2009, is the first international conference organized by the Geotechnical Society of Singapore with the support from 11 national societies or organisations.

The Geotechnical Society of Singapore (GeoSS) was officially formed in January 2008 and is now a member society of the International Society of Soil Mechanics and Geotechnical Engineering (ISSMGE). GeoSS has over 200 members and 18 founding corporate members. Before this international symposium, the Society has organized a good number of geotechnical seminars and workshops on a regular basis.

This proceeding contains 8 keynote lectures written by international renowned researchers and specialists which reflect the state-of-the-practice on the topics discussed in this Symposium. It is heartening to note that 94 papers from 22 countries are included in this Proceeding. These papers were selected from more than 150 abstract submissions after a rigorous review process. The papers cover a range of topics including Recent Development in Ground Improvement Technologies; Case Histories involving Major Infrastructure Projects; Design and Analytical Methods in Ground Improvement; Instrumentation and Monitoring in Ground Improvement; Variability/Quality Control Issues in Ground Improvement; Laboratory and Centrifuge Model Testing on Ground Improvement Studies; and Case Studies on Ground Improvement.

It is hoped that this Proceeding will be a useful source of reference to geotechnical engineers and professionals.

C. F. Leung, J. Chu and R. F. Shen