ANALYSIS ON CHARACTERISTICS OF LONG-TERM SETTLEMENT OF BORED PILE FOUNDATION OF HIGH-RISE BUILDING

Based on long-term settlement monitoring data of bored pile foundations in 26 high-rise buildings in Shanghai,analysis is made on the effects of the types of pile toe bearing strata,sand layer depth ratios in compressible layers under pile tip and soil properties surrounding the pile shaft on the long-term settlement characteristics of bored pile foundations.And the result shows that the pile toe bearing strata and the sand layer depth ratio are the major factors affecting the foundation settlement while the settlement of the bored piles is apparently less affected by surrounding soil than that of driven pile foundation is.