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（上海建科建設(shè)監(jiān)理咨詢有限公司 200032）
【提要】結(jié)合上海地區(qū)25棟高層建筑打入樁基長(zhǎng)期沉降觀測(cè)資料，分析樁端持力層的種類、樁端壓縮層砂土比、樁周土層特性以及建筑物施工速率對(duì)打入樁樁基長(zhǎng)期沉降特性的影響，并探討了樁周砂土層的存在對(duì)軟土地區(qū)打入樁沉降影響的機(jī)理。
【關(guān)鍵詞】 打入樁 長(zhǎng)期沉降 砂土比 負(fù)摩阻力 飽和軟粘土
Analysis of Effect Factors on Longterm Settlement of Driven Piles in Shanghai  Highrise Buildings/Zhou Hongbo (Shanghai Jianke Project Management Co., Ltd.,Shanghai 200032,China)
Abstract:Based on the longterm settlement monitoring data of driven piles in twentyfi
ve 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.
Keywords:driven pile; longterm settlement; sand layer depth ratio; negative skin fricti
on; saturated soft clay