| Journal Call no. | TA1.H62 |
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| Author | Berner, Petra. |
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| Article Title | Ground improvement at Chek Lap Kok : review of vibrocompaction at Hong Kong's new airport / Petra Berner. |
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| Is Part Of | HKIE transactions ; v.5, no.1, Apr 1998, p.1-5, illus. |
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| Abstract | The new Hong Kong airport at Chek Lap Kok is being constructed on a 1248 hectare site of which 928 hectares is reclaimed land. Vibrocompaction was carried out at three different areas of the reclamation in order to increase the relative density of sand fill, thereby increasing its' stiffness and strength, and creating an improved and more uniform material for follow on construction. The article presents the results of the vibrocompaction and discusses some of the factors encountered during the compaction that can lead to apparent non-conformance with the specification. Conclusions are drawn from the work with recommendations that should be considered for future vibrocompaction works. A knowledge of the initial state of the sand including index properties, relative density and compressibility, is important when selecting an acceptance criterion. An inappropriate acceptance criterion may cause unnecessary delays of the work and increased costs as a result. The use of shear wave velocity measurements as a compliment to the Cone Penetration Testing (CPT) is also discussed as valuable information on the state of the sand can be derived from this method of testing. |
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