上海高层建筑打入桩基长期沉降影响因素分析

Analysis of Effect Factors on Long-term Settlement of Driven Piles in Shanghai High-rise Buildings

结合上海地区25栋高层建筑打入桩基长期沉降观测资料,分析桩端持力层的种类、桩端压缩层砂土比、桩周土层特性以及建筑物施工速率对打入桩桩基长期沉降特性的影响,并探讨了桩周砂土层的存在对软土地区打入桩沉降影响的机理。

Based on the long-term settlement monitoring data of driven piles in twenty-five high-rise buildings in Shanghai, the effects of the type of pile toe bearing strata, sand layer depth ratio in compressible layers under pile tip, properties of soil round the pile shaft and construction speed rate on the long-term settlement characteristics are analyzed. The mechanisms of effect of the sand layer along the pile shaft on driven pile settlement in soft soil are discussed.