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（1 福建省建筑科學(xué)研究院， 福州 350025； 2 福建省綠色建筑技術(shù)重點(diǎn)實(shí)驗(yàn)室, 福州 350025）

［摘要］介紹了軟土地區(qū)平均長徑比約為62且在樁頂、樁端和各土層分界面均埋設(shè)鋼弦式鋼筋計(jì)的12根沖孔灌注樁的靜荷載試驗(yàn)結(jié)果。根據(jù)試驗(yàn)結(jié)果，分析了沖孔灌注樁的荷載傳遞的特性以及其極限側(cè)阻力和極限端阻力的變化規(guī)律。討論了沖孔灌注樁的施工工藝以及持力層性狀、沉渣厚度、嵌巖深度、沉渣成分和樁端后注漿等樁端嵌固情況對(duì)其承載力的影響。

［關(guān)鍵詞］沖孔灌注樁; 荷載傳遞; 極限側(cè)阻力; 極限端阻力; 樁端嵌固

中圖分類號(hào)：TU753.3      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：1002-848X(2014)03-0079-05

Load transfer characteristics of punched cast-in-situ pile in soft soil area

Shi Feng1,2, Lin Qingyi1,2, Zhang Dong1,2, Liang Xi1,2

(1 Fujian Academy of Building Research, Fuzhou 350025, China; 2 Fujian Green Building Technology Key Laboratory, Fuzhou 350025, China)

Abstract: The static load test results of 12 punched cast-in-situ piles in soft soil area, which have average length-diameter ratio of 62 and steel-string transducer at pile tip, at the side of pile and at the interfaces of soil layer were introduced. According to the test results, the characteristics of load transfer and variation law of ultimate side resistance and ultimate top resistance were analyzed. The influences of construction technique, the embedded situation such as bearing strata, thickness of residue,socket length,sediment composition,pile tip post-grouting on bearing capacity of piles were discussed.

Keywords: punched cast-in-situ pile; load transfer; ultimate side resistance; ultimate top resistance; pile tip embedded situation

作者簡介：施峰，教授級(jí)高級(jí)工程師，Email：fengshisf@163.com。

參考文獻(xiàn)

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［6］施峰.嵌巖樁承載力取值的探討［J］.建筑結(jié)構(gòu),2005,35(12)：9-11.