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(1上海建科建設(shè)監(jiān)理咨詢有限公司  200032;2 同濟(jì)大學(xué)地下建筑與工程系  上海 200092)
【提要】  結(jié)合上海地區(qū)十多組鉆孔樁靜載試驗(yàn)資料，分析鉆孔樁側(cè)摩阻力性狀，研究了鉆孔樁樁側(cè)土體臨界位移值的分布特征，并與打入樁進(jìn)行對(duì)比，分析了其影響因素，探討了鉆孔樁與打入樁承載力發(fā)揮過(guò)程的不同。統(tǒng)計(jì)計(jì)算了上海地區(qū)鉆孔樁樁側(cè)摩阻力分布系數(shù)，指出該值由于受施工工藝的影響而較傳統(tǒng)值偏小。
【關(guān)鍵詞】  鉆孔樁  樁土臨界位移  樁側(cè)摩阻力分布系數(shù)  施工工藝 荷載傳遞
Study on Behavior of Side Resistance of Bored Pile in Shanghai/Zhou Hongbo1,Chen Zhuchang2 (1 Shanghai Jianke Project Management Co.,Ltd.,Shanghai 200032,China; 2 Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China)
Abstract:Based on the load test data of over ten bored piles in Shanghai, the behavors of side resistance of bored piles are analyzed.The distribution characteristics of critical slip between bored pile and soil are studied and the effect factors are presented according to the comparison with the behaviors of driven piles.The difference of development process of bearing capacity between driven pile and bored pile is discussed.Based on the load tests,the distribution coefficient of skin friction is calculated and the average of calculated value is lower than the traditional value induced by the construction technology.
Keywords:bored pile; critical slip; distribution coefficient; skin friction; construction technology; load transfer