- 摘 要
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（上?，F(xiàn)代建筑設(shè)計集團工程建設(shè)咨詢有限公司， 上海 200041）
［摘要］在樁端后注漿鉆孔灌注樁的設(shè)計納入規(guī)范之前，已有不少工程實例采用了此種施工工藝，當(dāng)時其極限承載力計算主要依據(jù)地方經(jīng)驗及設(shè)計研究成果。選取多項工程實例，分別依據(jù)某單位設(shè)計研究成果、全國《建筑樁基技術(shù)規(guī)范》（JGJ 94—2008）和上海市《地基基礎(chǔ)設(shè)計規(guī)范》（DGJ 08-11—2010）來計算、比較各種計算方法單樁極限承載力和單樁注漿量的計算結(jié)果。分析結(jié)果表明，各種計算方法雖有差異，但單樁極限承載力的計算結(jié)果接近，均可作為估算單樁極限承載力的依據(jù)；而單樁注漿量的計算結(jié)果差異稍大，應(yīng)根據(jù)規(guī)范要求及地方經(jīng)驗選取，并控制好注漿終止條件。
［關(guān)鍵詞］樁端后注漿鉆孔灌注樁; 極限承載力; 注漿量; 靜載荷試驗
中圖分類號：TU470 文獻標識碼：A 文章編號：1002-848X(2014)14-0100-03
Comparison of different ultimate bearing capacity calculation methods of pile-end post-grouting bored piles
Li Ziqiang
(Shanghai Xian Dai Architecture, Engineering & Consulting Co., Ltd., Shanghai 200041， China)
Abstract: Before the design of pile-end post-grouting bored piles was taken into the formal specification, many engineering examples had used this technique. The calculation of the ultimate bearing capacity of single pile was based on the local experience and the research achievements of local design institutes. Several project examples were selected to compare the calculation results of the ultimate bearing capacity of single pile and the grouting volume of single pile-according to the research achievements of the local design institute, Technical code for building pile foundation(JGJ 94—2008), and Foundation design code of Shanghai(DGJ 08-11—2010) respectively. Analysis results show that the various calculating methods are different, but the values of the ultimate bearing capacity of single pile calculated by the methods are close and the calculation methods can be used as the basis of ultimate bearing capacity of single pile. The calculating results of the grouting volume of single pile have a slightly large difference and should be selected according to the specification requirements and local experience under the condition that the grouting termination condition is well controlled.
Keywords: pile-end post-grouting bored pile; ultimate bearing capacity; grouting volume; static load test
作者簡介：李自強，高級工程師，一級注冊結(jié)構(gòu)工程師，Email：ziqiang_li@xd-ad.com.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］DGJ 08-11—2010地基基礎(chǔ)設(shè)計規(guī)范[S].上海，2010.
［3］嚴敏，芮明倬，李自強. 樁底后注漿超長灌注樁在東方之門工程中的應(yīng)用[J].建筑結(jié)構(gòu)，2009,39(S1)：778-780.
［4］吳江斌，宋青君，王衛(wèi)東. 上海軟土地區(qū)樁端后注漿灌注樁[R].上海：華東建筑設(shè)計研究院有限公司.
［5］JGJ 94—94建筑樁基技術(shù)規(guī)范[S].北京：中國建筑工業(yè)出版社，1995.
［6］岳建勇，黃紹銘，王衛(wèi)東，等.上海軟土地區(qū)樁端后注漿灌注樁單樁極限承載力估算方法探討［Ｊ］．建筑結(jié)構(gòu)，2009，39（Ｓ１）：721-724.
［7］陶興文.上海地區(qū)鉆孔灌注樁后壓漿技術(shù)的設(shè)計與施工［Ｊ］．探礦工程（巖土鉆掘工程），2001（4）：35-36,38.
［8］吳江斌，王衛(wèi)東. 軟土地區(qū)樁端后注漿灌注樁合理注漿量與承載力計算[J]. 建筑結(jié)構(gòu)，2007,37(5)：114-116,129.
