人工挖孔與機械鉆孔結(jié)合灌注樁的設(shè)計及工程應用
張琳,李晶
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張琳,李晶(深圳市華陽國際工程設(shè)計有限公司, 深圳 518038)[摘要]針對人工挖孔和機械鉆孔兩種不同工藝的施工特點、基樁成樁工藝系數(shù)、樁端阻力特征值取值及樁端擴大頭截面尺寸等的區(qū)別,通過對基樁樁身軸心受壓正截面承載力和樁端擴大頭截面設(shè)計進行分析,提出設(shè)計過程中需要綜合考慮的各種因素及施工要求,為設(shè)計人員對此類樁基設(shè)計提供處理方法及設(shè)計思路。最后,通過具體工程實例論證了文中的設(shè)計方法。[關(guān)鍵詞]人工挖孔灌注樁; 機械鉆孔灌注樁; 樁基; 基樁中圖分類號:TU4731文獻標識碼:A文章編號:1002848X(2013)12008504Design and engineering application of the combination of digging filling piles and bored pilesZhang Lin, Li Jing(Shenzhen CAPOL International & Associates Limited, Shenzhen 518038,China)Abstract:It focuses on the multiple different factors of the digging filling pile and the bored pile,such as construction features, pileforming process coefficient of foundation pile,characteristic value of resistant force of pile end,and expanding head size of pile end. By analyzing the axial compression bearingcapacity of the section of foundation pile and section design of expanding head size of pile end,various factors needed to be considered and construction requirements were put forward,which provide a reference for designers. Finally,design method presented was checked through specific engineering projects.Keywords:digging filling pile; bored pile; pile foundation; foundation pile作者簡介:張琳,高級工程師,一級注冊結(jié)構(gòu)工程師,Email:Lzhang@capol.cn。參考文獻[1]JGJ 94—2008 建筑樁基技術(shù)規(guī)范[S].北京:中國建筑工業(yè)出版社,2008.[2]粵建管字[2003]49號.廣東省建設(shè)廳關(guān)于限制使用人工挖孔灌注樁的通知[S].2003.[3]DBJ 1531—2003 建筑地基基礎(chǔ)設(shè)計規(guī)范[S].北京:中國建筑工業(yè)出版社, 2003.