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Pit Bearing Capacity Effect on Status of Soil Plug During Pile Driving in Ocean Engineering
Abstract：Foundation piles of the offshore oil platforms in the Bohai Bay are usually longer than 100 m with a diameter larger than 2 m. Driving such long and large-sized piles into the ground is a difficult task. It needs a comprehensive consider ation of the pile dimensions, soil properties and the hammer energy. Thoughtful drivability analysis has to be performed in the design stage. It has been shown that judging whether the soil column inside the pile is fully plugged, which makes the pile behave as close-ended, strongly influences the accuracy of drivability analysis. Engineering practice repeatedly indicates that the current methods widely used for soil plug judgment often give incorrect results, leading the designers to make a wrong decision. It has been found that this problem is caused by the ignorance of the bearing capacity provided by the soil surrounding the pile. Based on the Terzaghis bearing capacity calculation method for deep foundation, a new approach for judging soil plug status is put forward, in which the surcharge effect has been considered and the dynamic effect coefficient is included. This approach has been applied to some practical engineering projects successfully, which may give more reasonable results than the currently used method does. 作者： Author： YAN Shu-wang ZHOU Qun-hua LIU Run DONG Wei 作者单位： School of Civil Engineering, Tianjin University, Tianjin 300072, China 期 刊： 中国海洋工程(英文版) ISTICEISCI Journal： CHINA OCEAN ENGINEERING 年，卷(期)： 2011, 25(2) 分类号： P752 Keywords： ocean platform pile pit bearing capacity plug status static equilibrium driveability 机标分类号： P7 TP3 机标关键词： Ocean Engineering Pile Driving During Soil Plug Bearing Capacity bearing capacity soil plug effect coefficient calculation method approach analysis deep foundation current methods results influences practical Bohai Bay provided practice diameter 基金项目： This research was financially supported by the National Natural Science Foundation of China【Pit Bearing Capacity Effect on Statu】相关文章：
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