Abstract:The ground vibrationin in LNG storage tank foundation reinforcement of Caofeidian industrial zone is studied. By the statistical analysis, frequency domain analysis and the law fitting based on dynamic compaction vibration observation records in the field, the attenuation law of ground vibrationin caused by dynamic compaction, the variation of amplitude (vibration velocity) changing with the frequency of tamping and the main frequency variation of dynamic compaction are shown. The safety assessment of vibration is made on the existing seawall and gas tank projects around the field to provide theoretical support for the selection of dynamic compaction parameters, which also makes up the researches on the similar ground vibration characteristics in China.

Abstract:Shougang Jingtan Co. is a large modernization outstanding quality iron and steel base in Caofeidian Island, which was newly built on a ground developed by hydraulic fill sand. Analysis was made on the geological conditions and commonly used methods of foundation pit support and dewatering in construction site; and the suggestions were also put forward to the foundation pit support and dewatering design for the existing buildings in construction site as well as the scheme selection.

Abstract:Analysis was made on the dynamic consolidation design, construction parameters and reinforcement effects by the application and successful experience of hydraulic fill sand foundation treatment with dynamic compaction method in Shougang Jingtang Caofeidian Steel United Company, which could be the reference for the similar projects.