Report No. : GEO Report No. 58

Report Title : Appraisal of Performance of Recompacted Loose Fill Slopes (1999), 86 p.

Author : K.T. Law, C.F. Lee, M.T. Luan, H. Chen & X. Ma


Since 1977 more than 200 loose fill slopes in Hong Kong have been upgraded under the Landslip Preventive Measures Programme. Approximately half of these upgraded slopes involved recompaction of the top 3 m in accordance with the recommendations of the 1976 Independent Review Panel for Fill Slopes. Surface recompaction has become the standard approach for rectifying substandard loose fill slopes where site conditions permit.

The main objective of this study is to carry out a systematic review of the performance of loose fill slopes upgraded using the surface recompaction technique and to review the adequacy of the recompaction approach.

The study has concluded that there is general improvement in the performance of the slopes after recompaction. The constraints and difficulties associated with the application of the recompaction method are generally surmountable and the hazard potential appears to have been reduced. Areas which require further attention or improvement are suggested by the consultants.

This Report, which contains the main text, is Volume 1 of the Main Report Series. Appendices 1 to 3 are contained in Volumes 2 to 5 which are available for inspection in the Civil Engineering Library.

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