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戴國(guó)亮，  龔維明
（東南大學(xué)土木工程學(xué)院，南京 210096）

[摘要]  為了研究壓樁和托樁下的摩阻力相關(guān)關(guān)系，在廣東佛山某公路橋梁樁基的同一根鉆孔灌注樁上分別進(jìn)行了自平衡靜載試驗(yàn)（模擬托樁加載）以及傳統(tǒng)靜載原位試驗(yàn)（模擬壓樁加載），對(duì)樁側(cè)摩阻力、荷載一位移曲線(xiàn)等進(jìn)行了比較，結(jié)果表明托樁加載的平均摩阻力為壓樁加載的0. 72倍，可為類(lèi)似工程提供參考。
[關(guān)鍵詞]  樁；自平衡測(cè)試法；靜載試驗(yàn)；摩阻力

Field test of friction resistance and negative skin friction of cast-in-situ piles
Dai  Guoliang, Gong Weiming
(College of Civil Engineering, Southeast University, Nanjing 210096, China)
   
Abstract: To research the relationship between friction resistance of top-loaded pile and that of down-loaded pile, self-balanced load test (to simulate down-loaded pile) and traditional static load test(to simulate top-loaded pile) were conducted on the same pile of a highway bridge in Foshan, Guangdong. On the basis of test results, the friction resistance of pile and curve of load versus displacement were compared. The ratio of friction resistance of down-loaded pile to that of top-loaded pile is O.72, which can provides reference for other related projects.
Keywords: pile; self-balanced test method; static load test; friction resistance of pile